Re: Looking for a Micro SCI disk controller

["Bill Garber" <willy46pa@comcast.net>]

"Wayne Stewart" <waynes@telus.dotnet> wrote in
message news:zRvQb.9163$P51.8532@clgrps12...
: Bill Garber wrote:
: > Seems to me from looking at quite a few,
: > from //c thru platinum //e, that code is
: > included in the rom. Prom should not be
: > necessary in that case. However there is
: > one questionable IC on that card. I had
: > a bit of trouble reading it even using
: > the larger version with brightness and
: > contrast enhanced. Do you know what chip
: > that is? It's at location U17.
: There shouldn't be any such code in the ROM.
: The floppy drive interface was designed after
: the Apple II was built. If the II didn't need
: it then they wouldn't have added it to the II+
: or IIe.

Ok, I just checked 2 different IIe actual ROMs
and neither one has the Disk II code. I guess
my upgrade ROMs have it because they were more
or less captured with the drive card in the slot.
Had to be, otherwise there would have been no
place to save it to. ;-) Now, maybe someone can
explain how that can work without any PROM.

: The part at U17 is a MPQ2906.

Yeah, That's a transistor array.

Bill @ GarberStreet Enterprizez };-)
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Email - willy4SPAM6pa@comXcast.net
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