├── hilo.95 ├── ciduino7.jpg ├── ciduino7-5.jpg ├── ciduino7-7.jpg ├── lunarlander.95 ├── mastermind.95 ├── ti95_receive.sh ├── ti95_send_leonardo.sh ├── ti95_fields.txt ├── ti95_send.sh ├── ti95_send_2.sh ├── ti95_program_codes.txt ├── ti95_program_codes_decimal.txt ├── ti95_interface_leonardo_final.ino ├── compiler_steps.txt ├── ti95_interface_uno.ino ├── ti95_interface_leonardo.ino ├── README.md └── LICENSE /hilo.95: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/molleraj/ti95interface/HEAD/hilo.95 -------------------------------------------------------------------------------- /ciduino7.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/molleraj/ti95interface/HEAD/ciduino7.jpg -------------------------------------------------------------------------------- /ciduino7-5.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/molleraj/ti95interface/HEAD/ciduino7-5.jpg -------------------------------------------------------------------------------- /ciduino7-7.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/molleraj/ti95interface/HEAD/ciduino7-7.jpg -------------------------------------------------------------------------------- /lunarlander.95: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/molleraj/ti95interface/HEAD/lunarlander.95 -------------------------------------------------------------------------------- /mastermind.95: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/molleraj/ti95interface/HEAD/mastermind.95 -------------------------------------------------------------------------------- /ti95_receive.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | sudo stty -F $1 460800 -icrnl -imaxbel \ 3 | -opost -onlcr \ 4 | -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 5 | echo "Receiving from TI-95. Press Ctrl-C to end (after PRESS STOP)" 6 | sudo cat $1 > $2 7 | -------------------------------------------------------------------------------- /ti95_send_leonardo.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # set serial conditions 3 | # removed sudo from stty and cat commands below after testing on Ubuntu 22.04 4 | stty -F $2 460800 -icrnl -imaxbel \ 5 | -opost -onlcr \ 6 | -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 7 | # now send to the TI-95 8 | echo "Sending to TI-95..." 9 | cat $1 > $2 10 | -------------------------------------------------------------------------------- /ti95_fields.txt: -------------------------------------------------------------------------------- 1 | Function Field 2 | CHR nnn 3 | CIO nnn or X 4 | COL nn 5 | DEV nnn 6 | DF aaa 7 | INV DF aaa 8 | DFA Fx:aaa@nnnn 9 | DFN Fx:aaa@aa 10 | DFN CLR 11 | DFN Fx CLR 12 | DSZ nnn or X 13 | INV DSZ nnn or X 14 | EXC nnn or X 15 | FIX n 16 | GET aaa 17 | INV GET aaa 18 | GTL aa 19 | INV GTL nnnn 20 | IF< nnn or X 21 | INV IF< nnn or X 22 | IF= nnn or X 23 | INV IF= nnn or X 24 | IF> nnn or X 25 | INV IF> nnn or X 26 | INC nnn or X 27 | INV INC nnn or X 28 | IND nnn or X 29 | LBL aa 30 | MRG nnn or X or = 31 | NAM aaa 32 | PUT aaa 33 | INV PUT aaa 34 | RCA nnn or X or = 35 | RCB hhhh 36 | RCL nnn or X 37 | RD aaa 38 | RF nn 39 | SBA hhh 40 | SBL aa 41 | INV SBL nnnn 42 | SF nn 43 | SHW n 44 | ST* nnn or X 45 | ST+ nnn or X 46 | ST- nnn or X 47 | ST/ nnn or X 48 | STA nnn or X 49 | STB hhhh 50 | STO nnn or X 51 | TF nn 52 | INV TF nn 53 | VFY aaa 54 | WID nn 55 | WRT aaa 56 | -------------------------------------------------------------------------------- /ti95_send.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # set serial conditions 3 | sudo stty -F $2 500000 -icrnl -imaxbel \ 4 | -opost -onlcr \ 5 | -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 6 | # set file byte start number 7 | bytestart=0 8 | # get file size 9 | filesize=$(wc -c < $1) 10 | # echo $filesize 11 | # get filehandle for USB serial adapter or whatever (e.g., /dev/ttyUSB0) 12 | #exec 4<$2 13 | # as long as you have not reached EOF 14 | while [ $bytestart -lt $filesize ] 15 | do 16 | # send 32 byte chunks 17 | dd bs=1 skip=$bytestart count=32 if=$1 of=$2 18 | #sleep 1 19 | #sudo dd bs=1 skip=3100 count=32 if=lunarlander.95 of=/dev/ttyUSB0 20 | # pause until Sent! is received 21 | message="Unsent" 22 | difference=$(($filesize-$bytestart)) 23 | echo $difference 24 | if [ $difference -gt 32 ] 25 | then 26 | #until [ "$message" = "Sent!" ] 27 | #do 28 | # read -n 5 message < /dev/ttyUSB0 29 | #done 30 | sleep 0.05 31 | fi 32 | # check if less than 32 bytes left in file 33 | #if (($filesize-$bytestart)<32) 34 | # then 35 | # then send remaining bytes 36 | # difference=$filesize-$bytestart 37 | # dd bs=$difference if=$1 38 | #fi 39 | # wait, don't need to do this! 40 | # dd automatically adjusts the final chunk size... 41 | # go to beginning of loop until done 42 | # increase bytestart counter by 32 43 | bytestart=$((bytestart+32)) 44 | done 45 | -------------------------------------------------------------------------------- /ti95_send_2.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # set serial conditions 3 | sudo stty -F $2 500000 -icrnl -imaxbel \ 4 | -opost -onlcr \ 5 | -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 6 | # set file byte start number 7 | bytestart=0 8 | # get file size 9 | filesize=$(wc -c < $1) 10 | # echo $filesize 11 | # get filehandle for USB serial adapter or whatever (e.g., /dev/ttyUSB0) 12 | #exec 4<$2 13 | # as long as you have not reached EOF 14 | while [ $bytestart -lt $filesize ] 15 | do 16 | # send 32 byte chunks 17 | dd bs=1 skip=$bytestart count=$3 if=$1 of=$2 18 | #sleep 1 19 | #sudo dd bs=1 skip=3100 count=32 if=lunarlander.95 of=/dev/ttyUSB0 20 | # pause until Sent! is received 21 | message="Unsent" 22 | difference=$(($filesize-$bytestart)) 23 | echo $difference 24 | if [ $difference -gt $3 ] 25 | then 26 | #until [ "$message" = "Sent!" ] 27 | #do 28 | # read -n 5 message < /dev/ttyUSB0 29 | #done 30 | sleep $4 31 | fi 32 | # check if less than 32 bytes left in file 33 | #if (($filesize-$bytestart)<32) 34 | # then 35 | # then send remaining bytes 36 | # difference=$filesize-$bytestart 37 | # dd bs=$difference if=$1 38 | #fi 39 | # wait, don't need to do this! 40 | # dd automatically adjusts the final chunk size... 41 | # go to beginning of loop until done 42 | # increase bytestart counter by 32 43 | bytestart=$(($bytestart+$3)) 44 | done 45 | -------------------------------------------------------------------------------- /ti95_program_codes.txt: -------------------------------------------------------------------------------- 1 | Code Function 2 | 00 NOP 3 | 01 CE 4 | 02 CLR 5 | 03 CMS 6 | 04 x~t 7 | 05 INV 8 | 06 HYP 9 | 07 HLP 10 | 08 PAU 11 | 09 HLT 12 | 0A BRK 13 | 0B Y/N 14 | 0C EE 15 | 0D +/- 16 | 0E . 17 | 0F ENG 18 | 10 = 19 | 11 ) 20 | 12 ( 21 | 13 SG+ 22 | 14 + 23 | 15 - 24 | 16 * 25 | 17 / 26 | 18 y^x 27 | 19 CUB 28 | 1A QAD 29 | 1B nPr 30 | 1C nCr 31 | 1D LCM 32 | 1E PF 33 | 1F CD 34 | 20 space 35 | 21 ! 36 | 22 " 37 | 23 # 38 | 24 $ 39 | 25 % 40 | 26 & 41 | 27 ' 42 | 28 ( 43 | 29 ) 44 | 2A * 45 | 2B + 46 | 2C , 47 | 2D - 48 | 2E . 49 | 2F / 50 | 30 0 51 | 31 1 52 | 32 2 53 | 33 3 54 | 34 4 55 | 35 5 56 | 36 6 57 | 37 7 58 | 38 8 59 | 39 9 60 | 3A : 61 | 3B ; 62 | 3C < 63 | 3D = 64 | 3E > 65 | 3F ? 66 | 40 @ 67 | 41 A 68 | 42 B 69 | 43 C 70 | 44 D 71 | 45 E 72 | 46 F 73 | 47 G 74 | 48 H 75 | 49 I 76 | 4A J 77 | 4B K 78 | 4C L 79 | 4D M 80 | 4E N 81 | 4F O 82 | 50 P 83 | 51 Q 84 | 52 R 85 | 53 S 86 | 54 T 87 | 55 U 88 | 56 V 89 | 57 W 90 | 58 X 91 | 59 Y 92 | 5A Z 93 | 5B [ 94 | 5C \ 95 | 5D ] 96 | 5E ^ 97 | 5F _ 98 | 60 ` 99 | 61 a 100 | 62 b 101 | 63 c 102 | 64 d 103 | 65 e 104 | 66 f 105 | 67 g 106 | 68 h 107 | 69 i 108 | 6A j 109 | 6B k 110 | 6C l 111 | 6D m 112 | 6E n 113 | 6F o 114 | 70 p 115 | 71 q 116 | 72 r 117 | 73 s 118 | 74 t 119 | 75 u 120 | 76 v 121 | 77 w 122 | 78 x 123 | 79 y 124 | 7A z 125 | 7B { 126 | 7C | 127 | 7D } 128 | 7E ~ 129 | 7F ← 130 | 80 0 131 | 81 1 132 | 82 2 133 | 83 3 134 | 84 4 135 | 85 5 136 | 86 6 137 | 87 7 138 | 88 8 139 | 89 9 140 | 8A A 141 | 8B B 142 | 8C C 143 | 8D D 144 | 8E E 145 | 8F F 146 | 90 F1 147 | 91 F2 148 | 92 F3 149 | 93 F4 150 | 94 F5 151 | 95 LR 152 | 96 LP 153 | 97 LL 154 | 98 LS 155 | 99 R# 156 | 9A ASM 157 | 9B PAR 158 | 9C CAT 159 | 9D CF 160 | 9E WB 161 | 9F KW 162 | A0 1/x 163 | A1 x^2 164 | A2 SQR 165 | A3 LN 166 | A4 LOG 167 | A5 SIN 168 | A6 COS 169 | A7 TAN 170 | A8 x! 171 | A9 ABS 172 | AA INT 173 | AB FRC 174 | AC SGN 175 | AD RND 176 | AE 13d 177 | AF DRG 178 | B0 FRQ 179 | B1 CS1 180 | B2 CS2 181 | B3 s 182 | B4 y' 183 | B5 MN 184 | B6 m-b 185 | B7 r 186 | B8 PI 187 | B9 OLD 188 | BA INS 189 | BB DEL 190 | BC RTN 191 | BD TRC 192 | BE PRT 193 | BF ADV 194 | C0 DMS 195 | C1 P-R 196 | C2 F-C 197 | C3 G-L 198 | C4 i-m 199 | C5 f-M 200 | C6 #-K 201 | C7 D-R 202 | C8 D-G 203 | C9 R-G 204 | CA DEC 205 | CB HEX 206 | CC OCT 207 | CD UNF 208 | CE 2sC 209 | CF RUN 210 | D0 not used 211 | D1 not used 212 | D2 not used 213 | D3 not used 214 | D4 not used 215 | D5 SF 216 | D6 RF 217 | D7 TF 218 | D8 DEV 219 | D9 SHW 220 | DA CHR 221 | DB FIX 222 | DC DF 223 | DD NAM 224 | DE PUT 225 | DF GET 226 | E0 RCL 227 | E1 EXC 228 | E2 STO 229 | E3 ST+ 230 | E4 ST- 231 | E5 ST* 232 | E6 ST/ 233 | E7 DSZ 234 | E8 INC 235 | E9 IF< 236 | EA IF= 237 | EB IF> 238 | EC MRG 239 | ED RCA 240 | EE STA 241 | EF RD 242 | F0 WRT 243 | F1 VFY 244 | F2 CIO 245 | F3 WID 246 | F4 COL 247 | F5 GTL 248 | F6 SBL 249 | F7 DFN 250 | F8 IND 251 | F9 GTO 252 | FA SBR 253 | FB DFA 254 | FC SBA 255 | FD STB 256 | FE RCB 257 | FF LBL 258 | -------------------------------------------------------------------------------- /ti95_program_codes_decimal.txt: -------------------------------------------------------------------------------- 1 | Code Function 2 | 000 NOP 3 | 001 CE 4 | 002 CLR 5 | 003 CMS 6 | 004 x~t 7 | 005 INV 8 | 006 HYP 9 | 007 HLP 10 | 008 PAU 11 | 009 HLT 12 | 010 BRK 13 | 011 Y/N 14 | 012 EE 15 | 013 +/- 16 | 014 . 17 | 015 ENG 18 | 016 = 19 | 017 ) 20 | 018 ( 21 | 019 SG+ 22 | 020 + 23 | 021 - 24 | 022 * 25 | 023 / 26 | 024 y^x 27 | 025 CUB 28 | 026 QAD 29 | 027 nPr 30 | 028 nCr 31 | 029 LCM 32 | 030 PF 33 | 031 CD 34 | 032 space 35 | 033 ! 36 | 034 " 37 | 035 # 38 | 036 $ 39 | 037 % 40 | 038 & 41 | 039 ' 42 | 040 ( 43 | 041 ) 44 | 042 * 45 | 043 + 46 | 044 , 47 | 045 - 48 | 046 . 49 | 047 / 50 | 048 0 51 | 049 1 52 | 050 2 53 | 051 3 54 | 052 4 55 | 053 5 56 | 054 6 57 | 055 7 58 | 056 8 59 | 057 9 60 | 058 : 61 | 059 ; 62 | 060 < 63 | 061 = 64 | 062 > 65 | 063 ? 66 | 064 @ 67 | 065 A 68 | 066 B 69 | 067 C 70 | 068 D 71 | 069 E 72 | 070 F 73 | 071 G 74 | 072 H 75 | 073 I 76 | 074 J 77 | 075 K 78 | 076 L 79 | 077 M 80 | 078 N 81 | 079 O 82 | 080 P 83 | 081 Q 84 | 082 R 85 | 083 S 86 | 084 T 87 | 085 U 88 | 086 V 89 | 087 W 90 | 088 X 91 | 089 Y 92 | 090 Z 93 | 091 [ 94 | 092 \ 95 | 093 ] 96 | 094 ^ 97 | 095 _ 98 | 096 ` 99 | 097 a 100 | 098 b 101 | 099 c 102 | 100 d 103 | 101 e 104 | 102 f 105 | 103 g 106 | 104 h 107 | 105 i 108 | 106 j 109 | 107 k 110 | 108 l 111 | 109 m 112 | 110 n 113 | 111 o 114 | 112 p 115 | 113 q 116 | 114 r 117 | 115 s 118 | 116 t 119 | 117 u 120 | 118 v 121 | 119 w 122 | 120 x 123 | 121 y 124 | 122 z 125 | 123 { 126 | 124 | 127 | 125 } 128 | 126 ~ 129 | 127 ← 130 | 128 0 131 | 129 1 132 | 130 2 133 | 131 3 134 | 132 4 135 | 133 5 136 | 134 6 137 | 135 7 138 | 136 8 139 | 137 9 140 | 138 A 141 | 139 B 142 | 140 C 143 | 141 D 144 | 142 E 145 | 143 F 146 | 144 F1 147 | 145 F2 148 | 146 F3 149 | 147 F4 150 | 148 F5 151 | 149 LR 152 | 150 LP 153 | 151 LL 154 | 152 LS 155 | 153 R# 156 | 154 ASM 157 | 155 PAR 158 | 156 CAT 159 | 157 CF 160 | 158 WB 161 | 159 KW 162 | 160 1/x 163 | 161 x^2 164 | 162 SQR 165 | 163 LN 166 | 164 LOG 167 | 165 SIN 168 | 166 COS 169 | 167 TAN 170 | 168 x! 171 | 169 ABS 172 | 170 INT 173 | 171 FRC 174 | 172 SGN 175 | 173 RND 176 | 174 13d 177 | 175 DRG 178 | 176 FRQ 179 | 177 CS1 180 | 178 CS2 181 | 179 s 182 | 180 y' 183 | 181 MN 184 | 182 m-b 185 | 183 r 186 | 184 PI 187 | 185 OLD 188 | 186 INS 189 | 187 DEL 190 | 188 RTN 191 | 189 TRC 192 | 190 PRT 193 | 191 ADV 194 | 192 DMS 195 | 193 P-R 196 | 194 F-C 197 | 195 G-L 198 | 196 i-m 199 | 197 f-M 200 | 198 #-K 201 | 199 D-R 202 | 200 D-G 203 | 201 R-G 204 | 202 DEC 205 | 203 HEX 206 | 204 OCT 207 | 205 UNF 208 | 206 2sC 209 | 207 RUN 210 | 208 not used 211 | 209 not used 212 | 210 not used 213 | 211 not used 214 | 212 not used 215 | 213 SF 216 | 214 RF 217 | 215 TF 218 | 216 DEV 219 | 217 SHW 220 | 218 CHR 221 | 219 FIX 222 | 220 DF 223 | 221 NAM 224 | 222 PUT 225 | 223 GET 226 | 224 RCL 227 | 225 EXC 228 | 226 STO 229 | 227 ST+ 230 | 228 ST- 231 | 229 ST* 232 | 230 ST/ 233 | 231 DSZ 234 | 232 INC 235 | 233 IF< 236 | 234 IF= 237 | 235 IF> 238 | 236 MRG 239 | 237 RCA 240 | 238 STA 241 | 239 RD 242 | 240 WRT 243 | 241 VFY 244 | 242 CIO 245 | 243 WID 246 | 244 COL 247 | 245 GTL 248 | 246 SBL 249 | 247 DFN 250 | 248 IND 251 | 249 GTO 252 | 250 SBR 253 | 251 DFA 254 | 252 SBA 255 | 253 STB 256 | 254 RCB 257 | 255 LBL 258 | -------------------------------------------------------------------------------- /ti95_interface_leonardo_final.ino: -------------------------------------------------------------------------------- 1 | #define INPUT_PIN 10 2 | #define OUTPUT_PIN 9 3 | #include 4 | 5 | uint8_t reverse_table[256] = { 0,128,64,192,32,160,96,224,16,144,80,208,48,176,112,240,8,136,72,200,40,168,104,232,24,152,88,216,56,184,120,248,4,132,68,196,36,164,100,228,20,148,84,212,52,180,116,244,12,140,76,204,44,172,108,236,28,156,92,220,60,188,124,252,2,130,66,194,34,162,98,226,18,146,82,210,50,178,114,242,10,138,74,202,42,170,106,234,26,154,90,218,58,186,122,250,6,134,70,198,38,166,102,230,22,150,86,214,54,182,118,246,14,142,78,206,46,174,110,238,30,158,94,222,62,190,126,254,1,129,65,193,33,161,97,225,17,145,81,209,49,177,113,241,9,137,73,201,41,169,105,233,25,153,89,217,57,185,121,249,5,133,69,197,37,165,101,229,21,149,85,213,53,181,117,245,13,141,77,205,45,173,109,237,29,157,93,221,61,189,125,253,3,131,67,195,35,163,99,227,19,147,83,211,51,179,115,243,11,139,75,203,43,171,107,235,27,155,91,219,59,187,123,251,7,135,71,199,39,167,103,231,23,151,87,215,55,183,119,247,15,143,79,207,47,175,111,239,31,159,95,223,63,191,127,255}; 6 | 7 | volatile int pwm_value = 0; 8 | volatile int prev_time = 0; 9 | volatile int byte_bit = 0; 10 | volatile byte current_byte = 0; 11 | volatile char reverse_byte = 0; 12 | volatile boolean state = 0; 13 | volatile boolean output_state = 0; 14 | volatile char receivedChar; 15 | volatile char reverseChar; 16 | volatile boolean newData = false; 17 | volatile boolean current_bit = false; 18 | static bool Xoffed = false; 19 | volatile boolean received; 20 | //volatile boolean sent; 21 | 22 | // paste data to serial monitor to "play tape" to TI-95 23 | // reverse bytes and stream bits coming in from serial monitor 24 | // run "WRT" routine on TI-95 to "record tape" on PC 25 | // convert PWM to bits, bits to bytes, and reverse bytes 26 | 27 | void setup() { 28 | // put your setup code here, to run once: 29 | // communicate at 460800 baud 30 | Serial.begin(460800); 31 | // Serial.setRxBufferSize(16384); 32 | // set TI-95 connection pins to input and output 33 | pinMode(INPUT_PIN, INPUT); 34 | pinMode(OUTPUT_PIN, OUTPUT); 35 | // use pullup resistor 36 | digitalWrite(INPUT_PIN, HIGH); 37 | // attach a PinChange Interrupt to our pin on the rising edge 38 | attachPCINT(digitalPinToPCINT(INPUT_PIN),change,CHANGE); 39 | //Serial.print(SERIAL_BUFFER_SIZE); 40 | } 41 | 42 | int incomingByte = 0; 43 | void loop() { 44 | // send data only when you receive data: 45 | if (Serial.available() > 0) { 46 | // read the incoming byte and reverse it 47 | receivedChar = reverse_table[Serial.read()]; 48 | // you have received new data 49 | newData = true; 50 | // play byte via PWM to TI-95 51 | play_byte(); 52 | } 53 | } 54 | 55 | void play_byte() 56 | { 57 | // for each byte, proceed through bits and send them to TI-95 58 | for (int i = 0; i < 8; i++) { 59 | // get bit 60 | current_bit = bitRead(receivedChar,i); 61 | if (current_bit == 0) { 62 | // zero pulse 63 | pwm_zero(); 64 | } 65 | if (current_bit == 1) { 66 | // one pulse 67 | pwm_one(); 68 | } 69 | } 70 | } 71 | 72 | void pwm_zero() { 73 | // pulse zero bit - 700 us 74 | output_state = not(output_state); 75 | digitalWrite(OUTPUT_PIN, output_state); 76 | delayMicroseconds(700); 77 | } 78 | 79 | void pwm_one() { 80 | // pulse one bit - two 350 us pulses 81 | pwm_one_half(); 82 | pwm_one_half(); 83 | } 84 | void pwm_one_half() { 85 | // each half of one (true) pulse 86 | output_state = not(output_state); 87 | digitalWrite(OUTPUT_PIN, output_state); 88 | delayMicroseconds(350); 89 | } 90 | 91 | void change() 92 | { 93 | // decode PWM into bits and bytes upon pin change interrupt 94 | pwm_value = micros()-prev_time; 95 | prev_time = micros(); 96 | // get state 97 | state = not(digitalRead(INPUT_PIN)); 98 | if (byte_bit==8) { 99 | // send reversed byte to serial after reaching eighth bit 100 | reverse_byte = reverse_table[current_byte]; 101 | Serial.write(reverse_byte); 102 | byte_bit=0; 103 | current_byte=0; 104 | } 105 | // long high or low pulse is a zero 106 | if ((pwm_value > 400) && (pwm_value < 750)) { 107 | byte_bit++; 108 | } 109 | else if ((pwm_value > 0) && (pwm_value < 400) && (state == 1)) { 110 | // short high pulse is a one 111 | bitSet(current_byte,byte_bit); 112 | byte_bit++; 113 | } 114 | } 115 | -------------------------------------------------------------------------------- /compiler_steps.txt: -------------------------------------------------------------------------------- 1 | Developing a TI-95 keystroke compiler in Linux 2 | 3 | The goal of the project is to create a piece of software that will convert TI-95 keystroke listings typed on a PC into TI-95 binary tape files and back. These will require two different approaches. 4 | 5 | From keystroke listings to tape files 6 | 7 | 1. Add initial 1208 zero bytes and constant header. 8 | 2. Convert listings to bytes from start to finish. 9 | 2a. Convert listings line by line. 10 | 2b. First line is three letter ASCII name of file ("CIR" for example). 11 | 2c. Split lines by spaces. Each line should be a single instruction (800, +, +/-, etc.), except for multipart instructions ("GTL AA") or ASCII (`Hello world`). 12 | 2d. Check for INV instructions before each instruction. 13 | 2d. Check for IND instructions after each instruction. 14 | 2e. Check for fields after appropriate instructions. Convert to appropriate number of bytes (1 or 2). 15 | 2f. Check for ASCII lines (`Hello world`) and convert accordingly to ASCII bytes (20h-7Fh). 16 | 3. Count number of bytes in converted binary file. 17 | 4. Combine total bytes and three-letter name in first line of file to first header in program. Calculate and add checksum. Print in duplicate with eight zero bytes in between. 18 | 5. Add another 1208 zero bytes. 19 | 6. Divide total bytes by 16. If there is a remainder, add that to the quotient to get the total number of 16 byte blocks. 20 | 7. Divide the number of 16 byte blocks by four. The quotient is the number of 64 byte records. The remainder times 16 is the length of the last incomplete block. 21 | 8. Create calculated number of (empty) complete records (64 bytes). 22 | 9. Create one incomplete record of specified length. 23 | 10. Copy incomplete record length from beginning of binary file bytes. 24 | Reverse order of copied bytes and paste into the incomplete record. 25 | 11. Proceed complete record lengths specified into file. Reverse order 26 | of copied bytes and paste into respective subsequent complete records 27 | until done. 28 | 12. Calculate checksums for each incomplete and complete record. 29 | 13. Paste complete and incomplete records into file with eight zero byte 30 | spacing between records, FF byte bookends, and checksums after each 31 | record. 32 | 14. Complete tape file with final FF byte. 33 | 15. Save tape file to disk. 34 | 35 | From tape files to keystroke listings 36 | 37 | 1. Identify header with name and byte length. Save each to respective 38 | variables. Begin keystroke listing file with respective 39 | three-letter name. 40 | 2. Identify header with number of complete records and length of 41 | incomplete record. Create this number of complete record and length 42 | incomplete record data structure. 43 | 3. From end of file, obtain incomplete and complete records and verify 44 | checksums. Reverse byte order and copy contents to respective data 45 | structure. 46 | 4. Combine incomplete and complete records in reverse order as found in 47 | file into single binary file for keystroke listing conversion. 48 | 5. Use table to convert bytes into keystrokes. Separate complete 49 | operations (e.g., +, GTL AH, INC 001) by newlines or specified delimiter 50 | (even spaces would be OK, and more realistic to the calculator's LEARN 51 | mode). 52 | 5a. Look for INV byte. If so, do not place new line - wait for next instruction, 53 | 5b. Look for IND byte after every instruction byte. If IND byte found, expect nnn or X (A-Z) after it (5b). 54 | 5c. Check for field after instructions with fields. 55 | 5d. Anytime an instruction or field are complete, or if none are found, look for sets of ASCII bytes (20-7E) until another instruction or number (not 20-7E). Place these ASCII bytes within quotes (e.g., 'Tests:'). 56 | 5e. Place new line after every complete instruction (INV +, SF +, SF IND +, 'Words', 800, etc.). Go back to 5a until done. 57 | 6. Save keystroke listing file to disk. 58 | 59 | In each direction, the program (can) save an intermediate binary file 60 | (direct conversion from keystrokes, not tape format). 61 | 62 | Errors: 63 | 1. No three-letter name in input or output, or inconsistent between 64 | header copies. 65 | 2. Checksums don't match. 66 | 3. Incorrect keystroke listing syntax (no argument where required, or 67 | argument where none required). 68 | 4. GTL a label that is not specified (no LBL). 69 | 5. Multiple keystroke commands (not 20-7F or 80-8F bytes) on single line (except INV or IND and other instructions). 70 | 6. Only INV or IND on a single line (these both require subsequent instructions or fields). 71 | 72 | -------------------------------------------------------------------------------- /ti95_interface_uno.ino: -------------------------------------------------------------------------------- 1 | #define INPUT_PIN 7 2 | #define OUTPUT_PIN 6 3 | #include 4 | 5 | uint8_t reverse_table[256] = { 0,128,64,192,32,160,96,224,16,144,80,208,48,176,112,240,8,136,72,200,40,168,104,232,24,152,88,216,56,184,120,248,4,132,68,196,36,164,100,228,20,148,84,212,52,180,116,244,12,140,76,204,44,172,108,236,28,156,92,220,60,188,124,252,2,130,66,194,34,162,98,226,18,146,82,210,50,178,114,242,10,138,74,202,42,170,106,234,26,154,90,218,58,186,122,250,6,134,70,198,38,166,102,230,22,150,86,214,54,182,118,246,14,142,78,206,46,174,110,238,30,158,94,222,62,190,126,254,1,129,65,193,33,161,97,225,17,145,81,209,49,177,113,241,9,137,73,201,41,169,105,233,25,153,89,217,57,185,121,249,5,133,69,197,37,165,101,229,21,149,85,213,53,181,117,245,13,141,77,205,45,173,109,237,29,157,93,221,61,189,125,253,3,131,67,195,35,163,99,227,19,147,83,211,51,179,115,243,11,139,75,203,43,171,107,235,27,155,91,219,59,187,123,251,7,135,71,199,39,167,103,231,23,151,87,215,55,183,119,247,15,143,79,207,47,175,111,239,31,159,95,223,63,191,127,255}; 6 | 7 | volatile int pwm_value = 0; 8 | volatile int prev_time = 0; 9 | volatile int byte_bit = 0; 10 | volatile byte current_byte = 0; 11 | volatile char reverse_byte = 0; 12 | volatile boolean state = 0; 13 | volatile boolean output_state = 0; 14 | volatile char receivedChar; 15 | volatile char reverseChar; 16 | volatile boolean newData = false; 17 | volatile boolean current_bit = false; 18 | static bool Xoffed = false; 19 | volatile boolean received; 20 | //volatile boolean sent; 21 | 22 | // paste data to serial monitor to "play tape" to TI-95 23 | // reverse bytes and stream bits coming in from serial monitor 24 | // run "WRT" routine on TI-95 to "record tape" on PC 25 | // convert PWM to bits, bits to bytes, and reverse bytes 26 | 27 | void setup() { 28 | // put your setup code here, to run once: 29 | // communicate at 500000 baud 30 | Serial.begin(500000); 31 | // Serial.setRxBufferSize(16384); 32 | // set TI-95 connection pins to input and output 33 | pinMode(INPUT_PIN, INPUT); 34 | pinMode(OUTPUT_PIN, OUTPUT); 35 | // use pullup resistor 36 | digitalWrite(INPUT_PIN, HIGH); 37 | // attach a PinChange Interrupt to our pin on the rising edge 38 | attachPCINT(digitalPinToPCINT(INPUT_PIN),change,CHANGE); 39 | //Serial.print(SERIAL_BUFFER_SIZE); 40 | } 41 | 42 | int incomingByte = 0; 43 | void loop() { 44 | // send data only when you receive data: 45 | if (Serial.available() > 0) { 46 | // read the incoming byte: 47 | //incomingByte = Serial.read(); 48 | int serial_bytes = Serial.available(); 49 | if (serial_bytes == 31) { 50 | received = true; 51 | } 52 | //Serial.print("Remaining bytes: "); 53 | //Serial.println(serial_bytes); 54 | // say what you got: 55 | //Serial.print("I received: "); 56 | //Serial.println(incomingByte); 57 | receivedChar = Serial.read(); 58 | Serial.println(receivedChar); 59 | newData = true; 60 | play_byte(); 61 | //check_buffer(); 62 | //recvOneChar(); 63 | } 64 | // report back to PC if 31 bytes sent... 65 | if (received==true && (Serial.available() == 0)) { 66 | Serial.println("Sent!"); 67 | received=false; 68 | } 69 | // PC receives "Sent!" and sends another 32 bytes... 70 | } 71 | 72 | void recvOneChar() { 73 | if (Serial.available() > 0) { 74 | receivedChar = Serial.read(); 75 | Serial.println(receivedChar); 76 | newData = true; 77 | } 78 | } 79 | 80 | void play_byte() 81 | { 82 | //reverseChar = reverse[receivedChar]; 83 | //Serial.println(receivedChar); 84 | for (int i = 0; i < 8; i++) { 85 | current_bit = bitRead(receivedChar,i); 86 | if (current_bit == 0) { 87 | //Serial.println(0); 88 | pwm_zero(); 89 | } 90 | if (current_bit == 1) { 91 | //Serial.println(1); 92 | pwm_one(); 93 | } 94 | } 95 | } 96 | 97 | void pwm_zero() { 98 | // print zero 99 | int start_time = micros(); 100 | output_state = not(output_state); 101 | digitalWrite(OUTPUT_PIN, output_state); 102 | delayMicroseconds(700); 103 | int zero_time = micros()-start_time; 104 | Serial.print(zero_time); 105 | Serial.print("\t"); 106 | Serial.println(output_state); 107 | } 108 | 109 | void pwm_one() { 110 | pwm_one_half(); 111 | pwm_one_half(); 112 | } 113 | void pwm_one_half() { 114 | // print one 115 | int start_time = micros(); 116 | output_state = not(output_state); 117 | digitalWrite(OUTPUT_PIN, output_state); 118 | delayMicroseconds(350); 119 | int one_time = micros()-start_time; 120 | Serial.print(one_time); 121 | Serial.print("\t"); 122 | Serial.println(output_state); 123 | } 124 | 125 | void change() 126 | { 127 | pwm_value = micros()-prev_time; 128 | prev_time = micros(); 129 | state = not(digitalRead(INPUT_PIN)); 130 | if (byte_bit==8) { 131 | // char 132 | reverse_byte = reverse_table[current_byte]; 133 | //if (reverse_byte<0x10) 134 | //{ 135 | // Serial.print("0"); 136 | //} 137 | //Serial.print(reverse_byte,HEX); 138 | Serial.write(reverse_byte); 139 | byte_bit=0; 140 | current_byte=0; 141 | } 142 | // long high or low pulse is a zero 143 | if ((pwm_value > 400) && (pwm_value < 750)) { 144 | //Serial.println("0"); 145 | byte_bit++; 146 | } 147 | else if ((pwm_value > 0) && (pwm_value < 400) && (state == 1)) { 148 | // short high pulse is a one 149 | //Serial.println("1"); 150 | bitSet(current_byte,byte_bit); 151 | byte_bit++; 152 | } 153 | //Serial.println(byte_bit); 154 | //Serial.print(pwm_value); 155 | //Serial.print("\t"); 156 | //Serial.println(state); 157 | //bitSet(current_byte,byte_bit); 158 | } 159 | 160 | // add software xon xoff flow control 161 | void check_buffer(){ 162 | if((!Xoffed)&&(Serial.available()>48)) { //buffer is 3/4 full better shut it down! 163 | Serial.write(0x13); // xoff 164 | Xoffed = true; 165 | } 166 | else if(Xoffed&&(Serial.available()<32)) { // more room in buffer Yea! turn it on! 167 | Serial.write(0x11); // Xon 168 | Xoffed = false; 169 | } 170 | } 171 | -------------------------------------------------------------------------------- /ti95_interface_leonardo.ino: -------------------------------------------------------------------------------- 1 | #define INPUT_PIN 10 2 | #define OUTPUT_PIN 9 3 | #include 4 | 5 | uint8_t reverse_table[256] = { 0,128,64,192,32,160,96,224,16,144,80,208,48,176,112,240,8,136,72,200,40,168,104,232,24,152,88,216,56,184,120,248,4,132,68,196,36,164,100,228,20,148,84,212,52,180,116,244,12,140,76,204,44,172,108,236,28,156,92,220,60,188,124,252,2,130,66,194,34,162,98,226,18,146,82,210,50,178,114,242,10,138,74,202,42,170,106,234,26,154,90,218,58,186,122,250,6,134,70,198,38,166,102,230,22,150,86,214,54,182,118,246,14,142,78,206,46,174,110,238,30,158,94,222,62,190,126,254,1,129,65,193,33,161,97,225,17,145,81,209,49,177,113,241,9,137,73,201,41,169,105,233,25,153,89,217,57,185,121,249,5,133,69,197,37,165,101,229,21,149,85,213,53,181,117,245,13,141,77,205,45,173,109,237,29,157,93,221,61,189,125,253,3,131,67,195,35,163,99,227,19,147,83,211,51,179,115,243,11,139,75,203,43,171,107,235,27,155,91,219,59,187,123,251,7,135,71,199,39,167,103,231,23,151,87,215,55,183,119,247,15,143,79,207,47,175,111,239,31,159,95,223,63,191,127,255}; 6 | 7 | volatile int pwm_value = 0; 8 | volatile int prev_time = 0; 9 | volatile int byte_bit = 0; 10 | volatile byte current_byte = 0; 11 | volatile char reverse_byte = 0; 12 | volatile boolean state = 0; 13 | volatile boolean output_state = 0; 14 | volatile char receivedChar; 15 | volatile char reverseChar; 16 | volatile boolean newData = false; 17 | volatile boolean current_bit = false; 18 | static bool Xoffed = false; 19 | volatile boolean received; 20 | //volatile boolean sent; 21 | 22 | // paste data to serial monitor to "play tape" to TI-95 23 | // reverse bytes and stream bits coming in from serial monitor 24 | // run "WRT" routine on TI-95 to "record tape" on PC 25 | // convert PWM to bits, bits to bytes, and reverse bytes 26 | 27 | void setup() { 28 | // put your setup code here, to run once: 29 | // communicate at 500000 baud 30 | Serial.begin(500000); 31 | // Serial.setRxBufferSize(16384); 32 | // set TI-95 connection pins to input and output 33 | pinMode(INPUT_PIN, INPUT); 34 | pinMode(OUTPUT_PIN, OUTPUT); 35 | // use pullup resistor 36 | digitalWrite(INPUT_PIN, HIGH); 37 | // attach a PinChange Interrupt to our pin on the rising edge 38 | attachPCINT(digitalPinToPCINT(INPUT_PIN),change,CHANGE); 39 | //Serial.print(SERIAL_BUFFER_SIZE); 40 | } 41 | 42 | int incomingByte = 0; 43 | void loop() { 44 | // send data only when you receive data: 45 | if (Serial.available() > 0) { 46 | // read the incoming byte: 47 | //incomingByte = Serial.read(); 48 | //int serial_bytes = Serial.available(); 49 | //if (serial_bytes == 31) { 50 | // received = true; 51 | //} 52 | //Serial.print("Remaining bytes: "); 53 | //Serial.println(serial_bytes); 54 | // say what you got: 55 | //Serial.print("I received: "); 56 | //Serial.println(incomingByte); 57 | receivedChar = reverse_table[Serial.read()]; 58 | //Serial.println(receivedChar); 59 | newData = true; 60 | play_byte(); 61 | //check_buffer(); 62 | //recvOneChar(); 63 | } 64 | // report back to PC if 31 bytes sent... 65 | // if (received==true && (Serial.available() == 0)) { 66 | // Serial.println("Sent!"); 67 | // received=false; 68 | //} 69 | // PC receives "Sent!" and sends another 32 bytes... 70 | } 71 | 72 | void recvOneChar() { 73 | if (Serial.available() > 0) { 74 | receivedChar = Serial.read(); 75 | Serial.println(receivedChar); 76 | newData = true; 77 | } 78 | } 79 | 80 | void play_byte() 81 | { 82 | //reverseChar = reverse[receivedChar]; 83 | //Serial.println(receivedChar); 84 | for (int i = 0; i < 8; i++) { 85 | current_bit = bitRead(receivedChar,i); 86 | if (current_bit == 0) { 87 | //Serial.println(0); 88 | pwm_zero(); 89 | } 90 | if (current_bit == 1) { 91 | //Serial.println(1); 92 | pwm_one(); 93 | } 94 | } 95 | } 96 | 97 | void pwm_zero() { 98 | // print zero 99 | int start_time = micros(); 100 | output_state = not(output_state); 101 | digitalWrite(OUTPUT_PIN, output_state); 102 | delayMicroseconds(700); 103 | int zero_time = micros()-start_time; 104 | //Serial.print(zero_time); 105 | //Serial.print("\t"); 106 | //Serial.println(output_state); 107 | } 108 | 109 | void pwm_one() { 110 | pwm_one_half(); 111 | pwm_one_half(); 112 | } 113 | void pwm_one_half() { 114 | // print one 115 | int start_time = micros(); 116 | output_state = not(output_state); 117 | digitalWrite(OUTPUT_PIN, output_state); 118 | delayMicroseconds(350); 119 | int one_time = micros()-start_time; 120 | //Serial.print(one_time); 121 | //Serial.print("\t"); 122 | //Serial.println(output_state); 123 | } 124 | 125 | void change() 126 | { 127 | pwm_value = micros()-prev_time; 128 | prev_time = micros(); 129 | state = not(digitalRead(INPUT_PIN)); 130 | if (byte_bit==8) { 131 | // char 132 | reverse_byte = reverse_table[current_byte]; 133 | //if (reverse_byte<0x10) 134 | //{ 135 | // Serial.print("0"); 136 | //} 137 | //Serial.print(reverse_byte,HEX); 138 | Serial.write(reverse_byte); 139 | byte_bit=0; 140 | current_byte=0; 141 | } 142 | // long high or low pulse is a zero 143 | if ((pwm_value > 400) && (pwm_value < 750)) { 144 | //Serial.println("0"); 145 | byte_bit++; 146 | } 147 | else if ((pwm_value > 0) && (pwm_value < 400) && (state == 1)) { 148 | // short high pulse is a one 149 | //Serial.println("1"); 150 | bitSet(current_byte,byte_bit); 151 | byte_bit++; 152 | } 153 | //Serial.println(byte_bit); 154 | //Serial.print(pwm_value); 155 | //Serial.print("\t"); 156 | //Serial.println(state); 157 | //bitSet(current_byte,byte_bit); 158 | } 159 | 160 | // add software xon xoff flow control 161 | void check_buffer(){ 162 | if((!Xoffed)&&(Serial.available()>48)) { //buffer is 3/4 full better shut it down! 163 | Serial.write(0x13); // xoff 164 | Xoffed = true; 165 | } 166 | else if(Xoffed&&(Serial.available()<32)) { // more room in buffer Yea! turn it on! 167 | Serial.write(0x11); // Xon 168 | Xoffed = false; 169 | } 170 | } 171 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # CIduino7: TI-95 Arduino Replacement Cassette Interface 2 | 3 | Watch the demo here! https://www.youtube.com/watch?v=DMReYWH7o-4 4 | 5 | ![image](/ciduino7-5.jpg) 6 | 7 | All files in this repository are related to the Arduino Uno/Leonardo-based replacement TI-95 cassette interface I am building. I decided to call it a CIduino7 as it replaces the original TI cassette interface for the 74/95, the TI CI-7. 8 | 9 | This interface will let you send and receive TI-95 programs from a Linux/Windows/Mac machine. It thus *requires* the Arduino Leonardo and a PC/Mac. Theoretically it should work with the TI-74 BasiCalc and CC-40 as these share the same Dockbus and Hexbus physical interfaces, respectively, and probably similar cassette protocols. Gregory McGill confirmed the interface works with the TI-74 on February 22, 2022. 10 | 11 | Currently only the Arduino Leonardo works for transmission in both directions (receiving from and sending to the TI-95), probably because it properly emulates hardware handshaking. 12 | 13 | Plans for building the interface are described below. I am now selling pre-built interfaces for $25 plus shipping. I offer a 14 day warranty - you can return the unit within two weeks of purchase for a refund if it's defective or damaged. 14 | 15 | Schematic (Arduino Uno/Leonardo to TI-95 Dockbus): 16 | 
 17 | GND      -> 10  
 18 | (PWM) 10 ->  6  
 19 | (PWM) 9  ->  3  
 20 |
21 | 22 | For reference, this is the Dockbus orientation from the back of the TI-95/TI-74. Look on the back of the calculator for a square notch. Pin 1 is closest to the square notch and pin 10 is furthest from it. 23 | 24 | 
 25 | Left side of calculator - square notch - 1--------10 (Dockbus) - right side of calculator
 26 |
27 | 28 | ![image](/ciduino7-7.jpg) 29 | 30 | I constructed my CIduino7 (shown in the image above) by connecting the male end of three male to female 20 cm Dupont jumper wires to the female GND and PWM pins of an Arduino Leonardo (specified above). I connected the female ends to the 3, 6, and 10 male pins of two stacked Arduino female headers wrapped on the outside with electrical tape. This wrapped, stacked header could then be inserted into the Dockbus port on the rear of the TI-95 (and TI-74). I uploaded the ti95_interface_leonardo_final.ino sketch to the Leonardo, making sure to install the PinChangeInterrupt (NicoHood, v1.2.9) library beforehand. 31 | 32 | TI-95 operation: 33 | 34 | Press I/O to access input/output menus first. Then select TAP for tape storage operations (F1). Select RD (F1) to read a file from cassette (PC/Arduino) or WRT (F2) to write a file to cassette (PC/Arduino). Enter in the three letter designation of the file you are transferring (e.g., MLD for lunarlander.95). Only run scripts on the computer (listed below) after pressing OK at "PRESS PLAY" or before pressing OK at "PRESS RECORD" prompts. 35 | 36 | PC operation: 37 | 38 | Scripts are Linux compatible, tested on a GalliumOS (Ubuntu 18.04) Chromebook. They have not yet been tested on a Mac (Unix), but they are expected to be compatible with Unix as well. Baud rate was reduced from 500000 to 460800 to make the sketch compatible with the terminal emulator RealTerm on Windows. The serial port should be set to that of the Arduino Leonardo and 460800 baud/8 bits/no stop bit/1 parity bit (460800 8N1). Send and receive TI-95 tape format files with regular send (send to TI-95) and capture (receive from TI-95) in RealTerm (confirmed to work on Windows 10). You can download RealTerm here: https://sourceforge.net/projects/realterm/. In RealTerm, make sure to NOT capture input to file as hex (leave Capture as Hex unset). 39 | 40 | Note that files some times get corrupted in transfer, usually after changing serial settings or running multiple programs that access the serial port. Make sure to inspect your file with a hex editor like hexedit, bless, xxd, or HxD. If your three letter header (e.g., HLO, MST, MLD) is incorrect or the data otherwise doesn't correspond to your program, unplug the adapter, plug it in again, and repeat the file transfer. Make sure your adapter is set to 460800 8n1. This has resolved issues in every case for me. 41 | 42 | Tape file format: 43 | 44 | Now that the format is documented, it will be possible to compile keystroke listings (typed in a certain format) to tape format and back. I am currently implementing a simple keystroke listing compiler in bash. So far I have provided the compiler plan in compiler_steps.txt. 45 | 46 | 1208 zero bytes (zero padding; time zero/one bit pulses on TI-95) 47 | 48 | FF byte 49 | 00 05 00 00 05 84 8E byte header (unknown, constant in all programs) 50 | Eight 00 bytes 51 | 52 | Repeat previous structure 53 | 54 | FF byte 55 | Total bytes low byte, total bytes high byte, three byte ASCII filename, checksum of previous five bytes 56 | Eight 00 bytes 57 | 58 | Repeat previous structure 59 | 60 | 1208 zero bytes (zero padding; time zero/one bit pulses on TI-95) 61 | 62 | FF byte 63 | Total bytes high byte, total bytes low byte, 00 byte, number of full (64 byte) records, number of bytes in final incomplete (<64 byte record) record (if present), 82 byte, checksum of previous six bytes 64 | Eight 00 bytes 65 | 66 | Repeat previous structure 67 | 68 | FF byte 69 | 64 byte record (reverse program order!) 70 | Checksum of previous 64 bytes 71 | Eight 00 bytes 72 | 73 | Repeat previous structure 74 | 75 | ... (repeat until all complete records encoded) 76 | 77 | FF byte 78 | Final record (under 64 bytes) 79 | Checksum of remaining previous bytes 80 | Eight 00 bytes 81 | 82 | Repeat previous structure 83 | 84 | FF byte (closing) 85 | 86 | Remember - all listings are in reverse order in the tape file. It also looks like the final incomplete record is only formed in multiples of 16 (10, 20, and 30h in the examples I have seen). Extra 00 bytes are placed in the beginning of the first complete record as needed (after the end of the program). 87 | 88 | Included files: 89 | 90 | ti95_receive.sh - to receive files from the TI-95 on the PC. 91 | Syntax: `ti95_receive.sh ` 92 | 93 | ti95_send.sh - to send files from the PC to the TI-95. 94 | Syntax: `ti95_send.sh ` 95 | 96 | ti95_send_2.sh - to send files from the PC to the TI-95, with adjustable chunk size (bytes per transfer) and delay between sending chunks. 97 | Syntax: `ti95_send_2.sh ` 98 | 99 | ti95_send_leonardo.sh - to send files from the PC to the TI-95 with the Leonardo-based interface. Currently the only working send script. 100 | Syntax: `ti95_send_leonardo.sh ` 101 | 102 | ti95_interface_uno.ino - sketch with send/receive PWM routines for Arduino Uno. 103 | 104 | ti95_interface_leonardo.ino - sketch with send/receive PWM routines for Arduino Leonardo. 105 | 106 | ti95_interface_leonardo_final.ino - final, cleaned up sketch with send/receive PWM routines for Arduino Leonardo. Requires PinChangeInterrupt library (NicoHood, v1.2.9 used when I compile/upload). 107 | 108 | lunarlander.95 - sample program received with ti95_receive.sh. This is a lunar lander simulation based on that for the HP 29C. Load with the filename MLD. 109 | 110 | mastermind.95 - Mastermind game for the TI-95. Load with the filename MST. 111 | 112 | hilo.95 - Hi-Lo game for the TI-95. Load with the filename HLO. 113 | 114 | © Abraham Moller, 2022 115 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------