File:Sinclair ZX Spectrum Issue 4B ULA and IC1 socket.jpg

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Summary

Crop of a photograph of a Sinclair ZX Spectrum Issue 4B main board showing the Ferranti ULA 6C001E-7 (date code 8429) in its socket at IC1, with IC25 (PC74HCT157P), IC24 (74HCT00) and IC23 (SN74LS32N) to its right and the upper RAM chips IC22 and IC21 (OKI M3732H-20RS) below. Cropped for Sinclair ZX Spectrum ULA Replacement.

Source

Cropped from File:Sinclair ZX Spectrum Issue 4B Motherboard.jpg on Wikimedia Commons (retrieved 2026-10-25), originally published on Flickr by AUIC Oficial on 29 April 2018 (RetroMadrid 2018).

Author

AUIC Oficial, photograph by Fernando Sáenz

Licence

Public domain: marked by the author with the Public Domain Mark on Flickr and recorded on Commons as Template:PD-author-FlickrPDM.

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	10:56, 25 October 2026		1,400 × 1,080 (318 KB)	Josh (talk \| contribs)	Image for the Spectrum ULA replacement guide

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Sinclair ZX Spectrum ULA Replacement