Re: EPROM Programmers AP64e MPC APEP and YKH128

[Wayne Lafreniere <wplafreniere@lynx.bc.ca>]

Hi Mark,

Just a correction to my last post, should be:

As for the eprom listing, please correct me if i'm wrong but i've been reading
roms on other cards by peeking all 16 ioslot locations then peeking all 256
iospace locations. This "activates " the EPROM space at C800
to CFFF , which I then copy to say $4000 (4000<C800.CFFFM) and save to
disk with bsave "name",A$4000, L2048 (note mixed binary and decimal). This
works every time. Looked at all cards with eproms in them, and saved all to
disk. But the AP64e does not do this. All files exactly 2048 long, so should
your file.  Will look at this file of the EPROM.



Wayne Lafreniere wrote:

> Hi Mark,
>
> I'm on a IIGS in Applesoft and 40 column mode. The card does not boot (pr# or
> otherwise). The chip is a 2716 (16k is 2k*8 sorry I'm an electronics guy more
> than computer). No menu or anything else but locked up computer. Unsoldered D2
> - is marked 2233 or possibly ZZ33 but should be the first. On web only ref is
> to a Russki site that says its a 3ooV 5A (!) silicon diode however its also
> marked 2233 A and maybe this indicates a second issue of this number for a
> different spec. Its obviously a small signal diode or zener. And in all my old
> electronic catalog it doesn't list this one.
>
> As for the eprom listing, please correct me if i'm wrong but i've been reading
> roms on other cards by peeking all 16 ioslot locations then peeking all 256
> iospace locations. This "activates " the EPROM space at Cx00 (in my case C200)
> to CxFF (CFFF), which I then copy to say $4000 (4000<C200.CFFFM) and save to
> disk with bsave "name",A$4000, L2048 (note mixed binary and decimal). This
> works every time. Looked at all cards with eproms in them, and saved all to
> disk. But the AP64e does not do this. All files exactly 2048 long so should
> your file.  Will look at this file of the EPROM.
>
> Thanks,
> Wayne
>
> Mark Cummings wrote:
>
> > Wayne,
> >
> > > No it just does not "do" anything but crash. Just peeked iospace , slot no
> > > program comes up. same with a pr#.
> >
> > the normal way to start it is to boot into ProDOS or just the Applesoft
> > Prompt, and get back to 40-column mode, then type PR#n (n=slot of the card).
> > this boots the card and comes up with your first menu where you choose what
> > size EPROM you are working on. there is more involved but if you get this
> > far you are nearly there and it probably works.
> >
> > > As for the Eprom, mine is a 16k chip - so may not be for this card at all!
> >
> > my bad, the EPROM is actually a 2716 or 2K in size. must have been on
> > another planet before. your EPROM should be the same, it is not likely to be
> > 16K (27128) if it's for the Apple ][, besides which it would have too many
> > pins, ie 28 instead of 24.
> >
> > > Caution duly noted on switches.
> > > Sorry didn't see your post about D2, but it is a small signal diode-
> > boldly
> > > marked 22 (nothing else I can see -wiggled back and forth). As for the
> > other
> > > two cards the APEP is probably an earlier relative of the AP64e.
> >
> > hmm 22 might mean 22V Zener ???, I'm still lost.
> >
> > anyway I did manage to get the image of the EPROM after about an hour of
> > investigation and about 10 attempts at burning a temporary image so I could
> > read the original EPROM completely. it appears that the mapping of the
> > addresses means that it is not as linear as I thought, and now I will have
> > to re-visit the disassembly we are working on.
> > I still have something wrong because now it looks to be 4K in size. I'll
> > check again tomorrow, but if you use only the first 2K it should be right.
> >
> > anyway for now it's here as a 4K file:
> > http://home.iprimus.com.au/figjams/apple2/AP64EPROM.BIN
> >
> > > > anyway the Manual:
> > > > http://home.iprimus.com.au/figjams/apple2/AP-64e.PDF
> > > > Wayne Stewart also has another version of this book on his "organised"
> > site.
> > > > the Circuit:
> > > > http://home.iprimus.com.au/figjams/apple2/AP64Ecct.PDF
> >
> > hope you can get it going, and I'll try to fix up the file back to 2K by
> > tomorrow.
> > if you need it in another format let me know. I could for example put in on
> > a shrink-it disk or file if that's easier.
> >
> > Mark