Do you mean the Memotech HRG or the chips?
Lets put it this way, the Memotech HRG don’t come up very often.
The PALs are obsolete. But can be replaced by GALs, but I suspect you already know this.
Mark
Memotech HRG ROM/PAL dumps?
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1024MAK
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Re: Memotech HRG ROM/PAL dumps?
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: Memotech HRG ROM/PAL dumps?
OMG destroy a Memotech to understand this mysterious card ?
Don't do that, it's bad luck for at least 81 years.
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
Re: Memotech HRG ROM/PAL dumps?
Maybe I should do so.
That could ensure me get at least 141 years old
In theory, there is no difference between theory and practice. But, in practice, there is.
Re: Memotech HRG ROM/PAL dumps?
Well hopefully not destroy. Desoldering these is pretty easy with a proper vacuum driven desoldering station - I've pulled hundreds of chips at this point. The reading/etc is not a risk. It's the overall "subjecting old parts to more heat than they're used to" thing. It's definitely working at the moment.