Skoti

POLAND • + Follow

Şevki Erduran

TURKEY
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Jose Maria Leal Real

SPAIN
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Engineer

PORTUGAL
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IRELAND, REPUBLIC OF
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25

Description

ZX Spectrum diagnostic 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

Code

Project Page

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

Schematic and Layout

Schematic

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

Apr 15,2023

4,555 views

ZX Spectrum diagnostic ROM

The interface allows you to connect an external ROM that can be used as ZX Spectrum diagnostic interface.

4555

9.88 (2)

Published: Apr 15,2023

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