ZX Spectrum 128
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- This article is about the "toastrack" 128K model. For other Spectrum models with 128K of RAM see ZX Spectrum 128K models
Infobox: ZX Spectrum 128
| Manufacturer | Sinclair Research / Investrónica |
| Mfg. volume | |
| CPU | Z80A @ 3.5469MHz |
| ROM | 32kB |
| RAM | 128kB |
| as pages | 8*16kB |
| Gfx Res | 256x192 |
| Gfx Colours | 15 (2 per 8x8 cell) |
Hardware
- Processor: Zilog Z80A microprocessor clocked at 3.5469MHz.
- ROM: 32KB ROM, arranged in 2 pages of 16KB.
- RAM: 128KB of Dynamic RAM, arranged in 8 pages of 16KB.
- Graphics: 256 x 192 pixels, 16 colours, attribute based. See Spectrum Video Modes.
- Sound: AY-3-8912 3 channel, 8 octave Programmable Sound Generator and "beeper". Modulated onto video signal.
- Keyboard: 58 plastic keys above a rubber pad and plastic membrane. Optional editor keypad.
- I/O: Software controlled RS232 serial port. Keypad Port. Tape In (ear) and Tape Out (mic).
Timings
Paging
| 0xFFFF - 0xC000 |
Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | Bank 5 (screen 0) |
Bank 6 | Bank 7 (screen 1) |
| 0xBFFF - 0x8000 |
Bank 2 | |||||||
| 0x7FFF - 0x4000 |
Bank 5 | |||||||
| 0x3FFF - 0x0000 |
ROM 0 | ROM 1 |