cliff@ethos.UUCP (Cliff Elam) (08/06/87)
Following is a more complete parts list for upgrading a PC7300 0.0K
EIA/RAM board to a 1.5M board.
There are a few unanswered questions before I (or you) take a deep
breath and begin:
1> What the **** is the part in location B1?
2> What speed are he **** drams? I can get 120 or 150's but I don't
want to do THAT kind of experimenting!
3> In a letter Mark Hilliard (seismo!rochester!kodak!gizzmo!mark) writes:
: OK, but I notice that in the schematics there is a delay line that is
: installed. This delay line is in a chip package, where do you plan on
: finding this at?
What's the news on this "delay line?" It's delaying me some! (sorry)
Special Notes:
The list is taken from Craig Votava's (ihnp4!looney!cmv) posting: all I
did was add some data from a book. Assume all standard disclaimers
apply.
----------------------------ASSEMBLY-LIST-BEGIN----------------------
(All data from my Motorola Schottky TTL Data book, copywrite 1983)
LOCATION: [A,B,C,E,H,J,K][5,6,7,8,9,10]
DESIGNATION: 48256 (memory chips, 256K by 1, 150ns) (or 120?)
LOCATION: [A,B,C,E,H,J,K][5,6,7,8,9,10]
DESIGNATION: (16 pin T/L sockets)
LOCATION: 1B
DESIGNATION: 74A574
LOCATION: 2C,2E
DESIGNATION: SN74LS280 (9 bit odd/even parity generators/checkers)
LOCATION: 2H
DESIGNATION: MC74F00 (Quad 2-input NAND gate)
LOCATION: 2J
DESIGNATION: MC74F32 (Quad 2-input OR gate)
LOCATION: 3A
DESIGNATION: MC74F08 (Quad 2-input AND gate)
LOCATION: 3H,3J
DESIGNATION: MC74F138 (1-of-8 decoder/demultiplexer)
LOCATION: 3K,4A,4B,4C,4E,4H,4J,4K
DESIGNATION: MC74F258 (Quad 2-input multiplexer (with 3-state outputs))
LOCATION: R1,R2
DESIGNATION: 33 Ohm 1/4W (or better) 5% (or better) resistor
LOCATION: RP2,RP3,RP4,RP5,RP6,RP7,RP8,RP10,RP12
DESIGNATION: 33 Ohm 8pin Resistor Pack 1/4W (or better) 5% (or better)
LOCATION: W1-3
DESIGNATION: Jumpers, 6 pins total, two each location
----------------------------ASSEMBLY-LIST-END------------------------
-cliff elam
ihnp4!ethos!fubar!cliff
--
Cliff {ihnp4,mcnc}!ethos!cliff
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