17 Jun
1998
17 Jun
'98
7:58 p.m.
Thanks for the help identifying the boards.
(Edited for clarity)
I wrote:
Uncle Roger wrote:
Max Eskin wrote:
>Unknown
nubus board
>Has markings DRO1 DEMO PC 10-184464- SER. NO. AA on component side.
>Has several unmarked chips and empty sockets. There is also a good
>deal of loose blue wire running hither and yon. On the end is a
female
>>37 pin connector. Obviously this is a prototype. Is there any way
>>to find out for what?
> Well, Dx-37F is
an external floppy connector for PC's. Coupled with
the
>"PC" in "DEMO PC", I'd guess a hardware PC emulator.
>
My thoughts exactly. Look at the card. Is there an intel or cyrix
microprocessor on the board? Another hint is four identical square
chips (the chipset).
Okay. There is not a single Intel chip on the board. There are no Cyrix,
Chips, nor any other obvious CPU type ICs on the board. There appears to
be some TTL, a PAL, a GAL, and a few empty sockets.
Here is what I can identify:
Cypress
2 ICs, one I believe is a PAL since it has PALC22V10 printed on it. The
other has CY7C245. Also there are 5 cards with 8 ICs (4 to a side). of
the 8 7 are unmarked and the 8th has CYM1441PZ printed on it.
Hitachi
4 chips all 74FCT534M
National
1 IC 74F525QC
Bunches of 74FCT chips of various flavors and breeds.
Lattice GAL16V8B-7LP
Unidentified:
1 square, unmarked surface mount IC with 104 pins.
2 ICs labled Bl (with the Bl underlined) 898-5 and R220/330. Also at the
edge of the chip there is the number 8805.
1 IC AD565AJD with gold colored top.
There are two empty square 76 pin sockets.
There are two empty rectangular 26 pin sockets. (ROM sockets?)
There are 7 sockets .5in on the inside edges. All are empty except for
one which contains the previously mentioned National IC.
This is likely not too helpful. It is appears to be missing some parts.
If anyone is interested, make me an offer. Otherwise it gets installed
in /dev/null on Sunday.
Thanks,
--pec
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