ZX Spectrum Technical Section
Spectrum Board Information
Schematics, Component layouts and port/connector pin-outs
| Title | Description | Date |
|---|---|---|
| Issue 2 board schematics | Schematic diagram of the Issue 2 Spectrum circuit board | - |
| Issue 2 component layout | Component layout template of the Issue 2 Spectrum circuit board | - |
| Issue 3 board schematics | Schematic diagram of the Issue 3 Spectrum circuit board | - |
| Issue 3 component layout | Component layout template of the Issue 3 Spectrum circuit board | - |
| Issue 3b board schematics | Schematic diagram of the Issue 3b Spectrum circuit board | - |
| Issue 3b component layout | Component layout template of the Issue 3b Spectrum circuit board | - |
| Issue 4a/b board schematics | Schematic diagram of the Issue 4a and 4b Spectrum circuit board | - |
| Issue 4a component layout | Component layout template of the Issue 4a Spectrum circuit board | - |
| Issue 5 board schematics | Schematic diagram of the Issue 5 Spectrum circuit board | - |
| Issue 5 component layout | Component layout template of the Issue 5 Spectrum circuit board | - |
| Issue 6a board schematics | Schematic diagram of the Issue 6a Spectrum circuit board | - |
| Issue 6a component layout | Component layout template of the Issue 6a Spectrum circuit board | - |
| Spectrum 128K board schematics | Analogue schematic diagram of the Spectrum 128K circuit board | - |
| Spectrum 128K board schematics II | Digital schematic diagram of the Spectrum 128K circuit board | - |
| Spectrum +2 board schematics | Schematic diagram of the Spectrum +2 circuit board | - |
| Spectrum +2 component layout | Component layout template of the Spectrum +2 circuit board | - |
| Spectrum +2 power supply | Schematic diagram of the Spectrum +2 power supply circuit board | - |
| Spectrum +2 Datasette Wiring Pinouts | Pinouts from the cassette recorder in the Spectrum +2 | - |
| Spectrum +2 Power Supply Pinouts | Pinouts from the cassette recorder in the Spectrum +2 | - |
| Kempston Joystick Interface | Schematic diagram of the Kempston joystick interface | - |
| Adding 'BRIGHT' signal to RGB monitor | Circuit diagram to modify your RGB output to include the bright signal from the computer | - |
| Pinouts & Power Supply requirements | Spectrum pinouts, including the ULA, 8192 sound chip, 128K composite video output, 128K RGB output, Sinclair power supply info and Interface 1 RS232 pinouts | - |
| DISCiple/+D Floppy Disk Connections | The cable and port connections for the DISCiple/+D | -b |
Spectrum Firmware
Disassembly of ROM code and other firmware-related articles.
| Title | Description | Date |
|---|---|---|
| ROM Disassembly | The complete ZX Spectrum ROM disassembly | - |
| How to create a 16K ROM | An assembler listing to create a 16K ROM for the Spectrum | - |
| ZX Interface 1 Operating System | The complete ZX Interface 1 ROM disassembly | - |
| Tape Loading Routine | The Spectrum tape loading routine as found in the ROM | - |
| Reading Sinclair Interface 2 ROMs | How to read the ROM interface in a Sinclair Interface 2 | - |
| Sinclair 128K Keypad ROM disassembly | The complete ZX Spectrum 128K keypad ROM code | - |
| Z80 Instruction Set | The complete Z80 Assembler list of instructions | - |
Peripherals
Original documents written by third-party manufacturers of Sinclair peripherals.
| Title | Description | Date |
|---|---|---|
| ZX Interface 1 Issue 4 board schematics | Schematic diagram of the Issue 4 ZX Interface 1 circuit board | - |
| ZX Interface 1 Microdrive board schematics | Schematic diagram of the ZX Interface 1 Microdrive circuit board | - |
| Multiface 1 board schematics | Schematic diagram of the Multiface 1 circuit board | - |