Re: 4k Z8 microcontrollers for 10 meg profile formatting

Thanks, James,

Knowing nothing about the architecture of the Z8, and not needing another project... on the face of it, changing the code to accommodate an extra 2K seems like it shouldn't be TOO hard... at least, it should be a lot easier than going the other way around!

It looks like there's a ROM dump on bitsavers---but it can't hurt to ask: anyone got listings? :-)

--Tom
On Oct 8, 2015 6:19 PM, "James MacPhail" <gg__at_email.domain.hidden> wrote:

>
> To low level format a ProFile, you need:
>
> - A Z8 with piggyback socket (as advertised in the eBay listing), but see
> note below.
>
> - An EPROM that plugs into the piggyback socket on the Z8.
>
> - A host computer and formatting software. You can use an Apple /// (Apple
> 3) and the "official" Apple software, or a Lisa running BLU (which attempts
> to mimic the basic function of the Apple ProFile Low Level Formatting
> software).
>
> Patrick posted that he had written some LLF software (with one or more
> features currently not in BLU), possibly for a different host computer.
>
> Al posted that there is stuff on bitsavers for this, presumably the EPROM
> image and the Apple /// software.
>
> Note: The 5M ProFile LLF EPROM is programmed for use in a 2K Z8, while the
> 10M ProFile LLF EPROM is programmed for use in a 4K Z8 (the version in the
> eBay listing).
>
> While it is probably possible to make some changes to the 5M ProFile LLF
> EPROM so it will work in a 4K Z8, I'm not aware of anyone having worked on
> it.
>
> Good luck!
>
> James
>
> I went ahead and bought a set of these on impulse while sitting in a
>> restaurant---and maybe I should have waited a little longer. Are
>> these chips only useful for 10 meg ProFiles? What about 5 meg
>> versions? And don't you need a special ROM too? What about Widgets?
>>
>
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