Mirco Gaggiottini Retrofixer
ITALY • + Follow
Components
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27C256 |
x 1 | |
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CFR-25JB-52-10KYAGEO
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x 2 | |
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1N4148ON SEMI
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x 2 |
Tools, APP Software Used etc.
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TL866II Plus ProgrammerXgecu
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Description
ZX Spectrum ROM replacement
ROM replacement for Sinclair ZX Spectrum
Use a 27C256, program it with the zx spectrum 48k rom and solder it to the board.
You can write a second image into the eprom from address $4000 so you can select it by closing the J1 connector
R1, R2: 10K Ohm resistor 1/4w
D1, D2: 1N4148 or equivalent diode
U1: 27C256
GitHub:
https://github.com/zeus074/ZX-Spectrum-ROM-adapter
*Program U1 before soldering it, don't use socket for the eprom.
Video:
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Schematic and Layout
Schematic
ZX-Spectrum-ROM-Replacement.pdf
Jul 12,2025
626 views
ZX Spectrum ROM replacement
A new way to change the ROM of the ZX Spectrum without modifying the motherboard
626
7
7
Published: Jul 12,2025
Standard PCB
Download Gerber file 16
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File Last Updated: 2025/07/22 (GMT+8)
File update record
2025-07-2215:50:30
Gerber file is updated.
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