Modifying a Sinclair ZX81 issue 1 - Upgrade the internal RAM to 16k bytes
Well, I had hoped to expand the text on the blog page that I created in August. But real life and other distractions has delayed this (blame the good weather ).
So go and have a look now
http://8and16bit.blogspot.co.uk/2015/08 ... cb-to.html
Mark
Modifying a Sinclair ZX81 issue 1 - RAM
- 1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Modifying a Sinclair ZX81 issue 1 - RAM
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
Re: Modifying a Sinclair ZX81 issue 1 - RAM
Nice work Mark !
32K SRAM WRX compatible, 32Bit IO-Port, ROM Ghost, ZX-Printer.