ZXpand primer
Re: ZXpand primer
There is also a new CPLD update, so you don't have to switch memory configuration with M=L / M=H. This CPLD update enables the RAM both at address 8-16k and 40-48k. The same physical RAM will be present in both places.
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Re: ZXpand primer
As far as I am aware, It’s the flash ROM code for the PIC microcontroller. In the PIC it’s in two parts, the “normal” code and a more primitive code that can be used to re-flash the ROM if the “normal” code is corrupted.
Mark
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.