https://github.com/konkotgit/ZX-external-ROM

ZX Spectrum external ROM
https://github.com/konkotgit/ZX-external-ROM

diagnostics interface rom zx-spectrum

Last synced: 3 months ago
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ZX Spectrum external ROM

• Host: GitHub
• URL: https://github.com/konkotgit/ZX-external-ROM
• Owner: konkotgit
• Created: 2020-04-11T10:00:19.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2022-06-28T16:10:45.000Z (over 2 years ago)
• Last Synced: 2024-07-30T21:10:05.802Z (6 months ago)
• Topics: diagnostics, interface, rom, zx-spectrum
• Size: 648 KB
• Stars: 11
• Watchers: 5
• Forks: 5
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ZX Spectrum external ROM

The interface allows you to connect an external ROM. The interface uses a 64K x 8-bit memory organization system, e.g. EEPROM W27C (E) 512 - 4 banks 16KB each, switched with DIP switch, which gives us the opportunity to run 4 different ROMs. 

After uploading the diagnostic ROMs, it can be used as a simple diagnostic interface for repairs.

The interface will work properly with computers:

* ZX Spectrum 48

* ZX Spectrum 128

* ZX Spectrum +2

* Timex 2048

The interface does not work with ZX Spectrum 128 + 2A / B and +3 computers

![ZX Spectrum external ROM](/photos/zx_external_diagnostic_interface_small.jpg)

### Look at YouTube:

[![YouTube link](https://img.youtube.com/vi/Yh-fAGhiGfk/0.jpg)](https://www.youtube.com/watch?v=Yh-fAGhiGfk)