Friday, 11 April 2025

Building a Replica Acorn System 5 Computer System - Part 3a, The 80 x 25 VDU Video PCB

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This is the Acorn 80 character by 25 line text card based on a 6845 type Cathode Ray Tube Controller ( CRTC) chip. It provides all the timin...
Tuesday, 25 March 2025

Building a Replica Acorn System 5 Computer System - Part 2a, The 40 x 25 VDU (Teletext ) Video PCB

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This is the 40 character by 25 line text card based on a SAA5050 Teletext chip. It can show normal Teletext characters and semi-graphics. It...
Tuesday, 18 March 2025

Building a Replica Acorn System 5 Computer System - Part 1b, The 6502A PCB

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 Soldering components continued. The vertically mounted resistor now all in. The link headers fitted. The 20 way IDC latched header fitted....
Monday, 17 March 2025

Building a Replica Acorn System 5 Computer System - Part 1a, The 6502A PCB

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Finally after the long process of buying all the parts, well, all the electronic parts at least, construction has started 😀. Here I have st...
Saturday, 15 March 2025

Building a Replica Acorn System 5 Computer System - The PCBs

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 The PCBs arrived 😀    Well, okay, they actually arrived last year, but I forgot to post the photos 😳
Thursday, 7 November 2024

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Building a Replica Acorn System 5 Computer System Earlier this year I came across a website all about the Acorn System computer (a single bo...
Saturday, 4 November 2023

Extracting or removing a DIL chip from a socket

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Or indeed, inserting a DIL chip in a socket Sounds easy right? Unfortunately many people who are trying this for the first time quickly find...