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Re: Parallel Card

mdj wrote:
> David Wilson wrote:
> > mdj wrote:
> > > Sorry, I don't know what a HAL16R8 is ...
> >
> > A HAL16R8 is to a ROM as a PAL16R8 is to a PROM. A GAL16V8 would be the
> > EPROM equivalent.

I should have compared the GAL with an EEPROM as it does not use UV
light to erase it.

> It's interesting that Apple II hardware generally used PALs and later
> GALs, which I suppose indicates the production quantities were too
> small to justify HAL pricing.

Only Apple itself used HALs AFAIK (eg TMG chip on IIe and IIc, GLU chip
on IIc). All the other manuafcturers like Precision Software
(FingerPrint GSi card has two PAL10L8 chips) were not selling enough
cards.