brian@aaisd.UUCP (Brian Conley) (11/07/90)
This is in response to the request:
Yes please send the signal assignments for the RAM SIMM sockets for the
MAC IIfx. It would be much appreciated.
Conor Nolan
Trinity College
cnolan@mee.tcd.ie
The mail I sent you seemed to bounce, so here it is on the net.
Pin Number Signal Name Signal Description
---------- ----------- ------------------
1 GND Ground
2 n.c. Not Connected
3 +5v +5 Volts
4 +5v +5 Volts
5 /CAS Column address strobe
6 D0 Data input bus, bit 0
7 Q0 Data output bus, bit 0
8 /W0 Write-enable input for RAM IC 0
9 A0 Address bus, bit 0
10 n.c. Not Connected
11 A1 Address bus, bit 1
12 D1 Data input bus, bit 1
13 Q1 Data output bus, bit 1
14 /W1 Write-enable input for RAM IC 1
15 A2 Address bus, bit 2
16 n.c. Not Connected
17 A3 Address bus, bit 3
18 GND Ground
19 GND Ground
20 D2 Data input bus, bit 2
21 Q2 Data output bus, bit 2
22 /W2 Write-enable input for RAM IC 2
23 A4 Address bus, bit 4
24 n.c. Not Connected
25 A5 Address bus, bit 5
26 D3 Data input bus, bit 3
27 Q3 Data output bus, bit 3
28 /W3 Write-enable input for RAM IC 3
29 A6 Address bus, bit 6
30 n.c. Not Connected
31 A7 Address bus, bit 7
32 D4 Data input bus, bit 4
33 Q4 Data output bus, bit 4
34 /W4 Write-enable input for RAM IC 4
35 A8 Address bus, bit 8
36 n.c. Not Connected
37 A9 Address bus, bit 9
38 A10 Address bus, bit 10
39 A11 Address bus, bit 11
40 D5 Data input bus, bit 5
41 Q5 Data output bus, bit 5
42 /W5 Write-enable input for RAM IC 5
43 n.c. Not Connected
44 n.c. Not Connected
45 GND Ground
46 D6 Data input bus, bit 6
47 Q6 Data output bus, bit 6
48 /W6 Write-enable input for RAM IC 6
49 n.c. Not Connected
50 D7 Data input bus, bit 7
51 Q7 Data output bus, bit 7
52 /W7 Write-enable input for RAM IC 7
53 /QB Reserved (parity)
54 n.c. Not Connected
55 /RAS Row address strobe
56 n.c. Not Connected
57 n.c. Not Connected
58 Q Parity-check output
59 /WWP Write wrong parity
60 PDCI Parity daisy-chain input
61 +5v +5 volts
62 +5v +5 volts
63 PDCO Parity daisy-chain output
64 GND Ground
This information was taken out of the Guide to the Macintosh Family Hardware
by Apple Computer, Inc.
Macintosh is a registered trademark of Apple Computer Inc.
I would recommend buying this book it is loaded with information.
I hope this information is what you needed. Please let me know when you
receive it.
--
| Brian Conley (408)727-5546 ext 327 | Sysop: The Storage House |
| Systems Administration (SUN/DEC/Apollo) | A Macintosh based BBS |
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