Commodore 16
Budget 264-series machine with the best Commodore BASIC and the hottest chip.
Open the Commodore 16 in Retro Bench- Also
- C16 / C116 (264 series)
- Year
- 1984
- CPU
- 7501/8501 @ 0.89/1.79 MHz (NTSC)
- RAM
- 16 KB (12,277 free)
- ROM
- BASIC 3.5 + KERNAL (2 × 16 KB)
- Video
- TED 7360: 40×25 text, 320×200, 121 colors
- Sound
- TED, 2 voices
- OS
- Commodore BASIC 3.5
Chips
| Chip | Where | Role |
|---|---|---|
| 7360 / 8360 TED | U1 | Video, sound, DRAM controller, MMU, keyboard scan |
| 7501 / 8501 CPU | U2 | CPU |
| PLA 82S100 | U16 | Address decode + bank switching |
| 6529 Single Port Interface | U13 | Keyboard column latch / user port |
| 4416 DRAM 16K×4 | U5, U6 | C16 main RAM (2 chips = 16 KB); C128 VDC video RAM |
| 23128 Mask ROM 16K×8 | U3 (BASIC 318006), U4 (KERNAL 318005) | BASIC and KERNAL ROMs (C16, Plus/4, C64C short board, C128) |
Ports and connectors
- Power in (9 V DC), Round 2-pin power socket UNVERIFIED
- Joystick 1 / 2, Mini-DIN 8 (264 series)
- Cassette (1531 Datasette), Mini-DIN 7
- Serial (IEC) disk / printer, DIN-6
- Video / audio, DIN-8 (262°)
- Memory expansion port, 50-contact card edge (2 × 25)
Power rails
| Rail | Expect | Measure at |
|---|---|---|
| +9 V DC in | About +9 V DC UNVERIFIED | c16-power pin 2 (CN8); 7805 VR1 input |
| +5 V | +5 V | 7805 output; TED pin 4; 7501 pin 5; 4416 pin 9 |
Symptoms
- Hot chip, no video: check TED
- No boot: check 7501, TED
- Garbled screen / random crashes: check 4416, 4164
- Dead keyboard: check 6529, TED
- No RS-232 (Plus/4): check 6551
- Black screen: check 7501