Table of Contents
Plus/4 Assembly 310163-01
- Released in 1984.
- Version: A
- Schematic Number 310164.
Specs
- CPU : 8501/7501 @ 0.885/1.76 MHz
- RAM : 64kB DRAM
- ROM : 32kB ROM Total - 16K BASIC, 14K Kernal, 2K Character (additional 32kb ROM for integrated software)
- Graphics : TED 8360
- Sound : TED 8360
- Interfaces : 2 Control Ports, A/V, Datasette Port, Expansion Port, Serial IEC, TV RF, User Port
- Keyboard : 67 Keys
- Power Supply : External Transformer (9V AC + 5V DC)
Schematics
Capacitor List
Cap - Value - Rating - Type C1 - 100uf - 16v - Radial C7 - 2200uf - 16v - Axial C8 - 10uf - 16v - Radial C17 - 10uf - 16v - Radial C18 - 10uf - 16v - Radial C20 - 10uf - 16v - Radial C22 - 10uF - 16v - Radial C23 - 1uf - 16v - Radial C27 - 10uf - 16v - Radial C30 - 10uf - 16v - Radial
IC List
| PCB ID | Chip ID | Notes |
|---|---|---|
| U1 | 8360/7360 | TED |
| U2 | 8501/7501 | Processor |
| U3 | 6551A | ACIA |
| U4 | 74LS08 | Logic AND |
| U5 | 6529B | SPI |
| U6 | 74LS04 | HEX Inverter Buffer |
| U7 | 7406 | Hex Inverter Buffer |
| U8 | 555 | Timer |
| U9 | 74LS257 | Multiplexor |
| PCB ID | Chip ID | Notes |
|---|---|---|
| U10 | 74LS257 | Multiplexor |
| U11 | 4164-2 | DRAM |
| U12 | 4164-2 | DRAM |
| U13 | 4164-2 | DRAM |
| U14 | 4164-2 | DRAM |
| U15 | 4164-2 | DRAM |
| U16 | 4164-2 | DRAM |
| U17 | 4164-2 | DRAM |
| U18 | 4164-2 | DRAM |
| PCB ID | Chip ID | Notes |
|---|---|---|
| U19 | 7700 | PLA |
| U20 | 74LS139 | Demultiplexor |
| U21 | 74LS175 | Quad D-Type Flip Flop |
| U22 | 74LS27 | Triple 3-Input NOR Gate |
| U23 | 23128 | ROM - Basic |
| U24 | 23128 | ROM - Kernal |
| U25 | 23128 | ROM - Function Low |
| U26 | 23128 | ROM - Function High |
| U27 | 6529B | SPI |