Overclocking the machine
Overclocking the machine
Just wondering if anyone has looked into overclocking their machine yet?
Re: Overclocking the machine
Yes, it was done in some clones in the past. It is very well described there: http://www.user.dccnet.com/wrigter/inde ... /turbo.htm.
Claudius
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Re: Overclocking the machine
Andy (a member here) has seriously overclocked a ZX81. However he was using his older ULA replacement module.
With a standard Sinclair ULA, overclocking is difficult as you can’t change the frequency without messing up the screen display.
Mark
With a standard Sinclair ULA, overclocking is difficult as you can’t change the frequency without messing up the screen display.
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
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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: Overclocking the machine
Slight correction, the older ULA could do 2X speed... my special 1 of a kind zeddy , whilst based on that older ULA its very different and the cpld is on a break out board so that i could use all the IO it goes 20Mhz flat out and runs 3.333Mhz at normal speed ( 20Mhz / 6 ) it also benefits from completely split busses so no resistor isolation bridges are needed.
the Wilf Rigter pages are awesome !
Regards Andy
what's that Smell.... smells like fresh flux and solder fumes...