3DS problem solving
6 June 2020
ZX Spectrum composite mod
30 June 2020
Quick links to sections
A/V connector VIC20 - C16 - Plus4 - C64 - C128
RGB C128
1. Luminance (S-video Y)
2. GND
3. Sound out
4. Composite videos
5. Audio in (max 3 Volts)
6. Chroma (S-video C)
7. NC
8. +5V (NC in early versions)
1. GND
2. GND
3. Red (RGB)
4. Green (RGB)
5. Blue (RGB)
6. Intensity
7. Monochrome
8. Horizontal sync
9. Vertical Sync
Cassette connector
PET - VIC20 - C64 - C128
A-1. GND
B-2. + 5V
C-3. Motor
D-4. (IN) Reading
E-5. (OUT) Writing
F-6. (IN) Sense (key pressed)
B-2. + 5V
C-3. Motor
D-4. (IN) Reading
E-5. (OUT) Writing
F-6. (IN) Sense (key pressed)
C16 - Plus 4
1. GND
2. + 5V
3. Motor 4. (IN) Reading
5. (OUT) Writing
6. (IN) Sense (key pressed)
7. GND
2. + 5V
3. Motor 4. (IN) Reading
5. (OUT) Writing
6. (IN) Sense (key pressed)
7. GND
Serial port
VIC20 - C64 - C128 - PLUS4 - C16
1. _SRQ
2. GND
3. ATN (Attention)
4. Clock
5. Date
6. _Reset
User port
C64 - C128
| 1 | GND | |
| 2 | + 5V | +5V (100mA max) |
| 3 | /RESET | Reset, also used to reset the connected device |
| 4 | CNT1 | Counter1, CIA #1 |
| 5 | SP1 | Serial port 1, CIA #1 |
| 6 | CNT2 | Counter 2, CIA #2 |
| 7 | SP2 | Serial port 2, CIA #2 |
| 8 | /PC2 | Handshaking, CIA #2 |
| 9 | AT extension | Serial attention in |
| 10 | 9VAC | 9VAC (100mA max) |
| 11 | 9VAC | 9VAC (100mA max) |
| 12 | GND |
| TO | GND | |
| b | /FLAG2 | Flags 2 |
| c | PB0 | Date 0 |
| D. | PB1 | Date 1 |
| And | PB2 | Date 2 |
| F. | PB3 | Date 3 |
| H. | PB4 | Date 4 |
| j | PB5 | Date 5 |
| k | PB6 | Date 6 |
| L | PB7 | Date 7 |
| m | PA2 | PA2 |
| No | GND |
VIC 20
| 1 | GND | |
| 2 | + 5V | +5V (100mA max) |
| 3 | /RESET | Reset, also used to reset the connected device |
| 4 | JOY0 | Connected to the joystick pin |
| 5 | JOY1 | Connected to the joystick pin |
| 6 | JOY2 | Connected to the joystick pin |
| 7 | Light Pen | Connected to the joystick Fire pin |
| 8 | Cassette Switch | Cassette SENSE line |
| 9 | AT extension | Serial attention in |
| 10 | 9VAC | 9VAC (100mA max) |
| 11 | 9VAC | 9VAC (100mA max) |
| 12 | GND |
| TO | GND | |
| b | CB1 | CB1 |
| c | PB0 | Date 0 |
| D. | PB1 | Date 1 |
| And | PB2 | Date 2 |
| F. | PB3 | Date 3 |
| H. | PB4 | Date 4 |
| j | PB5 | Date 5 |
| k | PB6 | Date 6 |
| L | PB7 | Date 7 |
| m | CB2 | CB2 |
| No | GND |
PLUS 4
| 1 | GND | |
| 2 | + 5V | +5V (100mA max) |
| 3 | /RESET | Reset, also used to reset the connected device |
| 4 | P2 | Date 2 |
| 5 | P3 | Date 3 |
| 6 | P4 | Date 4 |
| 7 | P5 | Date 5 |
| 8 | RCLK extension | Clock reception |
| 9 | AT extension | Serial attention in |
| 10 | 9VAC | 9VAC (100mA max) |
| 11 | 9VAC | 9VAC (100mA max) |
| 12 | GND |
| TO | GND | |
| b | P0 | Date 0 |
| c | RXD extension | RX date |
| D. | Rt0 | Request t0 send |
| And | DTR extension | Data Terminal Ready |
| F. | P7 | Date 7 |
| H. | DCD extension | Data Carrier Detect |
| j | P6 | Date 6 |
| k | P1 | Date 1 |
| L | dsr extension | Dataset ready |
| m | TX extension | TX date |
| No | GND |
PET
| 1 | GND | |
| 2 | VIDEO | |
| 3 | /SRQ IN | |
| 4 | /EOI | Date 2 |
| 5 | DIAG | Date 3 |
| 6 | #2 CAS RD | Cassette reading #2 |
| 7 | CASWR | Cassette writing |
| 8 | #1 CAS RD | Cassette reading #1 |
| 9 | VDRIVE | Vertical drive |
| 10 | HDRIVE | Horizontal drive |
| 11 | GRAPHICS | 9VAC (100mA max) |
| 12 | GND |
| TO | GND | |
| b | CA1 | |
| c | PA0 | Date 0 |
| D. | PA1 | Date 1 |
| And | PA2 | Date 2 |
| F. | PA3 | Date 3 |
| H. | PA4 | Date 4 |
| j | PA5 | Date 5 |
| k | PA6 | Date 6 |
| L | V7 | |
| m | CB2 | |
| No | GND |
Power connector
C64 - VIC20
1. GND / NC
2. GND (black)
3. GND / NC
4. NC (On VIC20: +5V or NC)
5. +5V (red)
6. 9V ~ (Brown)
7. 9V ~ (white)
C128
1. +5V (red)
2. GND (black)
3. 9V ~ (Brown)
4. NC / GND
5. 9V ~ (white)
PLUS4
1. +5V (1A)
2. GND
3. 9V ~ (0.75A)
4. 9V~
C16
Internal: GND
External: +9V (0.8A)
Joystick holder
VIC20 - C64 - C128
| PIN | PORT 1 | PORT 2 (not VIC20) |
DESCRIPTION |
|---|---|---|---|
| 1 | JOY A0 | JOY B0 | ON |
| 2 | JOY A1 | JOY B1 | BELOW |
| 3 | JOY A2 | JOY B2 | LEFT |
| 4 | JOY A3 | JOY B3 | RIGHT |
| 5 | POT AY | POT BY | INPUT Y |
| 6 | PULS. TO | PULS. B. | FIRE |
| 7 | +5 VOLT | +5 VOLT | 100mA MAX |
| 8 | GND | GND | |
| 9 | POT AX | POT BX | INPUT X |
C16 - PLUS 4
| PIN | PORT 1 | PORT 2 | DESCRIPTION |
|---|---|---|---|
| 1 | JOY A0 | JOY B0 | ON |
| 2 | JOY A1 | JOY B1 | BELOW |
| 3 | JOY A2 | JOY B2 | LEFT |
| 4 | JOY A3 | JOY B3 | RIGHT |
| 5 | +5V DC | +5V DC | |
| 6 | PULS. TO | PULS. B. | FIRE |
| 7 | GND | GND | |
| 8 | DATE 2 | DATE 1 | SELECT |
Expansion port
C64
| Pin | Signal | Direction (from C64) | Meaning |
|---|---|---|---|
| 1 | GND | PWR extension | ground |
| 2-3 | +5V DC | PWR extension | +5V DC |
| 4 | _IRQ | In | InterruptRequest |
| 5 | R/_W | Out | Read or _Write indicator |
| 6 | DOT Clk | Out | Dot clock frequency |
| 7 | _IO1 | Out | Input/Output area 1 indicator |
| 8 | _GAME | In | Game configuration |
| 9 | _EXROM | In | External ROMs |
| 10 | _IO2 | Out | Input/Output area 2 indicators |
| 11 | _ROML | Out | ROM Low |
| 12 | B.A | Out | Bus Available |
| 13 | _DMA | In | Direct Memory Access |
| 14 | Q7 | I | Data lines 7 |
| 15 | Q6 | I | Data lines 6 |
| 16 | Q5 | I | Data lines 5 |
| 17 | Q4 | I | Datalines 4 |
| 18 | Q3 | I | Data lines 3 |
| 19 | Q2 | I | Data lines 2 |
| 20 | Q1 | I | Data line 1 |
| 21 | D0 | I | Dataline 0 |
| 22-A | GND | PWR extension | ground |
| b | _ROMH | Out | ROM High |
| c | _RESET | In | Reset |
| D. | _NMI | In | Non-maskable interrupts |
| And | PHI2 | Out | Phase 2 clock |
| F. | A15 | Out | Address line 15 |
| H. | A14 | Out | Address line 14 |
| j | A13 | Out | Address line 13 |
| k | A12 | Out | Address line 12 |
| L | A11 | Out | Address line 11 |
| m | A10 | Out | Address line 10 |
| No | A9 | Out | Address line 9 |
| P. | A8 | Out | Address line 8 |
| R | A7 | Out | Address line 7 |
| S. | A6 | Out | Address line 6 |
| T | A5 | Out | Address line 5 |
| u | A4 | Out | Address line 4 |
| v | A3 | Out | Address line 3 |
| w | A2 | Out | Address line 2 |
| x | A1 | Out | Address line 1 |
| Y | A0 | Out | Address line 0 |
| Z | GND | PWR extension | ground |
VIC20
| Pin | signal | Description | Comment |
|---|---|---|---|
| 1 | GND | ground | (0 Volts) |
| 2 | D0 | data line 0 | databus of the computer |
| 3 | Q1 | data line 1 | |
| 4 | Q2 | data lines 2 | |
| 5 | Q3 | data lines 3 | |
| 6 | Q4 | data lines 4 | |
| 7 | Q5 | data lines 5 | |
| 8 | Q6 | dataline 6 | |
| 9 | Q7 | data lines 7 | |
| 10 | /BLK 1 | Memory block 1 | Chip select for block 1; active-low, if address on bus is within $2000-$3FFF. |
| 11 | /BLK 2 | Memory block 2 | Chip select for block 2; active-low, if address on bus is within $4000-$5FFF. |
| 12 | /BLK 3 | Memory block 3 | Chip select for block 3; active-low, if address on bus is within $6000-$7FFF. |
| 13 | /BLK 5 | Memory block 5 | Chip select for block 5; active-low, if address on bus is within $A000-$BFFF. |
| 14 | /RAM 1 | RAM 1 | Chip select for RAM (memory area $0400 – $07FF) |
| 15 | /RAM 2 | RAM 2 | Chip select for RAM (memory area $0800 – $0BFF) |
| 16 | /RAM 3 | RAM 3 | Chip select for RAM (memory area $0C00 – $0FFF) |
| 17 | VR/W | VIC Read – /Write | high during read cycle, low during write cycle of the VIC |
| 18 | CR/W | CPU Read-/Write | high during read cycle, low during write cycle of the CPU |
| 19 | /IRQ | InterruptRequest | Interrupt Request Line |
| 20 | NC | not connected | |
| 21 | +5V DC | Supply Voltage +5V DC | + 5 Volts DC. |
| 22 | GND | ground | (0 Volts) |
| TO | GND | ground | (0 Volts) |
| b | A0 | address line 0 | address bus of the computer |
| c | A1 | address line 1 | |
| D. | A2 | address line 2 | |
| And | A3 | address line 3 | |
| F. | A4 | address line 4 | |
| H. | A5 | address line 5 | |
| j | A6 | address line 6 | |
| k | A7 | address line 7 | |
| L | A8 | address line 8 | |
| m | A9 | address line 9 | |
| No | A10 | address line 10 | |
| P. | A11 | address line 11 | |
| R | A12 | address line 12 | |
| S. | A13 | address line 13 | |
| T | /I/O2 | inputs/outputs 2 | input/output area 2 ; active low, if address on the bus is within $9800-$9BFF. |
| u | /I/O3 | inputs/outputs 3 | input/output area 3 ; active low, if address on the bus is within $9C00-$9FFF. |
| v | SØ2 | S Phi 2 | system clock (1.108MHz for PAL, 1.018MHz for NTSC) |
| w | /NMI | non-maskable interrupts | Non Maskable Interrupt Line |
| x | /RESET | Reset | If you pull this line to low, all chips will be re-initialized. The program counter of the CPU will be loaded with the reset-vector $FFFC and $FFFD (usually $FFD22). |
| Y | NC | not connected | |
| Z | GND | ground | (0 Volts) |
C16 - PLUS 4
| PIN | SIGNAL | PIN | SIGNAL |
|---|---|---|---|
| 1 | GND | TO | GND |
| 2 | +5V DC | b | C1 Low |
| 3 | +5V DC | c | _Reset |
| 4 | _IRQ | D. | RAS |
| 5 | R/_W | And | Ø0 |
| 6 | C1 High | F. | A15 |
| 7 | C2Low | H. | A14 |
| 8 | C2 High | j | A13 |
| 9 | _CS1 ($C000-$FFFF) | k | A12 |
| 10 | _CS0 ($8000-$BFFF) | L | A11 |
| 11 | CAS | m | A10 |
| 12 | Mux | No | A9 |
| 13 | B.A | P. | A8 |
| 14 | Q7 | R | A7 |
| 15 | Q6 | S. | A6 |
| 16 | Q5 | T | A5 |
| 17 | Q4 | u | A4 |
| 18 | Q3 | v | A3 |
| 19 | Q2 | w | A2 |
| 20 | Q1 | x | A1 |
| 21 | D0 | Y | A0 |
| 22 | AEC extension | Z | NC |
| 23 | Audio-in | YY | NC |
| 24 | Ø2 | BB | NC |
| 25 | GND | CC | GND |
geek and handyman
2 Comments
peccato non trova la porta utente del vic20
Grazie della segnalazione, l’ho aggiunto.