Commodore 116

Owner: Michael Kathke
Location: Germany

Basically a prototype for the C-16 and Plus/4 computers, the C116 was loaded with neat features.

CPU:

• 7501 (6502 / 6510 compatible)

TED:

• 7360 (ACIA + Sound + Video)

RAM:

• 16kB

VIDEO:

• 40x25 character
• 121 colours

OTHER:

• Realtime clock
• Build in ASM "TEDMON" :-)
• No serial port :-(

BASIC:

• CLOSE, CMD, DLOAD, DOPEN, DSAVE, GET, GET#, GETKEY, INPUT, INPUT#, JOY, LOAD, OPEN, POT, PRINT, PRINT#, PRINT USING, PUDEF, READ-DATA, SAVE, VERIFY
• DEF-FN, DIM, DO-LOOP-[EXIT, UNTIL, WHILE], END, FOR-TO-NEXT, GOSUB-RETURN, GOTO, IF-THEN-[ELSE], LET, MONITOR
• NEW, ON-[GOSUB, GOTO], REM, RESTORE, RUN, SYS, USR, WAIT
• FRE, PEEK, POKE
• BACKUP, COLLECT, COPY, DIRECTORY, HEADER, INITIALIZE, NEW, RENAME, SCRATCH, VALIDATE
• BOX, CHAR, CIRCLE, COLOR, DRAW, GRAPHIC, LOCATE, PAINT, RCLR, RDOT, RGR, RLUM, SCALE, WIDTH, GSHAPE, SSHABE
• SOUND, VOL
• CLR, POS, SCNCLR, SPC, TAB
• DS, DS$, EL, ER, ERR$, RESUME, ST, TRAP
• ASC, CHR$, INSTR, LEFT$, LEN, MID$, RIGHT$, STR$, VAL
• AUTO, CONT, DELETE, HELP, KEY, LIST, RENUMBER, STOP, TROFF, TRON
• ABS, ATN, COS, DEC, EXP, HEX&, INT, LOG, RND, SIN, SGN, SQR, TI, TI$, AND, NOT, OR

Upgrading the C116 from 16kB to 64kB:

1. Lift "pin 14 from U8" or cut PCB layer between 14 and 16 at U8 (+5V)
2. Patch from "U2 pin 21 (A14)" to "U8 pin 14 (A3)"
3. Lift "pin 2 from U7" or cut PCB layer between 2 and 16 at U7 (+5V)
4. Patch from "U2 pin22 (A15)" to "U7 pin 2 (A0)"
5. Remove both RAM-Chips U5 and U6 "TMS 4416-20"
6. Insert 4464 chips. (NEC1464C15, TMS4464-15)

... 2B \/ 2B ... you have 60671 bytes free!

Upgrading the C116: View One & View Two

• Funky cursor keys. Notice that it's all one piece, rather than 4 seperate keys, as on the Plus/4.
• Interior view
• Top view, showing the nice keyboard. Basically a chiclet version of the Plus/4 keyboard.
• Close-up of the keys
• Serial label from the underside
• The colorful logo, kept pretty much intact for the Plus/4
• Printed circuit board.The cable in the upper left is for the speaker, the upper right goes to the Switch 16/64kB RAM.
• The complete handdrawn schematic! (These files are very large.)
  • Page 1
  • Page 2
  • Page 3
  • Page 4
• The strange ports...from left to right:
  1. Power Plug
  2. Reset Button
  3. Serial RS
  4. Cassette
  5. Memory Expansion (up on is my external keyboard port)
  6. Joy 1
  7. Joy 2
  8. Video

Back to the Museum!