PDP-8 CPU Module Maps
Part of
the PDP-8 Hardware Documentation
|
PDP-8 CPU Module Maps
Part of
the PDP-8 Hardware Documentation
|
Note: The following material has been proofread a few times, but the DEC original drawings from which this material is taken were not printed clearly, and as a result, there may be errors here!
Note, to make this figure easier to type, I've turned it on its side!
Key: ---- unused slot
++ low half of double height module
Back end of CPU Backplane
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PA PB PC PD PE PF
1 W024 W024 W024 W024 W024 W024
2 W026 ---- R284 W024 I/O I/O
3 W026 W026 R603 R113 I/O I/O
4 W026 W026 R111 R002 I/O I/O
5 W026 W026 R111 R002 R123 ----
6 R210 ++ R181 R181 R107 ----
7 R210 ++ R211 ++ ---- ----
8 R210 ++ R211 ++ R650 ----
9 R210 ++ R211 ++ W005 ----
10 R210 ++ R211 ++ ---- W640
11 R210 ++ R211 ++ A502 A604
12 R210 ++ R211 ++ R203 A604
13 R210 ++ R211 ++ R401 A604
14 R210 ++ R211 ++ R302 A601
15 R210 ++ R211 ++ R603 A601
16 R210 ++ R211 ++ A704 ++
17 R210 ++ R211 ++ R111 R212
18 R210 ++ R211 ++ R123 R212
19 R603 R603 R181 R181 R123 R212
20 R602 R602 R602 R603 R111 R212
21 R107 R603 R603 R603 R002 R212
22 R111 R111 R603 R602 R107 R212
23 R002 R111 R603 R111 R603 R602
24 R111 R111 R002 R111 R002 R111
25 R111 R284 R111 R002 R205 R205
26 R002 R107 R111 R107 R111 R205
27 R111 R151 R111 R111 R111 R205
28 R602 R203 R111 R111 R002 R603
29 R603 R111 R002 R002 R603 R111
30 R111 R107 R602 R401 R107 R602
31 R111 R111 R111 R107 R603 R111
32 R002 R111 R203 R602 R203 R111
33 R603 R107 R603 R602 R203 R002
34 R302 R202 R302 R002 R111 R111
35 R302 R405 R111 R002 R111 R002
36 W501 R603 R203 R111 R111 R405
PA PB PC PD PE PF
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Front end of CPU Backplane
Note, to make this figure easier to type, I've turned it on its side!
Key: ---- unused slot
++ low half of double height module
* used only with #182 EAE
& used only with #189 A-D converter
= used only with KR01 power interrupt
< used only with 681 data line interface
! differs from preliminary version! (DWJ)
Back end of CPU Backplane
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PA PB PC PD PE PF
1 W024 W024 W024 W024 W024 W024
2 W026 ---- R284 W024 W011 ! W011 !
3 W026 W026 R603 < R113 < W011 ! W011 !
4 W026 W026 R121 < R002 !< W011 ! W011 !
5 W026 W026 R111 < R603 R123 < R107 !=
6 R210 ++ R181 R181 R107 < R002 !=
7 R210 ++ R211 ++ R107 R302 !=
8 R210 ++ R211 ++ R650 W501 !=
9 R210 ++ R211 ++ W005 R602 !=
10 R210 ++ R211 ++ R121 ! W640
11 R210 ++ R211 ++ A502 & A604 &
12 R210 ++ R211 ++ R203 & A604 &
13 R210 ++ R211 ++ R401 & A604 &
14 R210 ++ R211 ++ R302 &= A601 &
15 R210 ++ R211 ++ R603 &< A601 &
16 R210 ++ R211 ++ A704 & ++
17 R210 ++ R211 ++ R111 * R212 *
18 R210 ++ R211 ++ R123 * R212 *
19 R603 R603 R181 R181 R123 * R212 *
20 R602 R602 R602 R603 R111 * R212 *
21 R107 R603 R603 R603 R002 * R212 *
22 R111 R111 R603 R602 R107 * R212 *
23 R002 R111 R603 R111 R603 * R602 *
24 R111 R111 R002 R111 R002 * R111 *
25 R111 R284 R111 R002 R205 * R205 *
26 R002 R107 R111 R107 R111 * R205 *
27 R111 R151 R111 R111 R111 * R205 *
28 R602 R203 R111 R111 R002 * R603 *
29 R603 R111 R002 R002 R603 * R111 *
30 R111 R107 R602 R401 R107 * R602 *
31 R111 R111 R111 R107 R603 * R111 *
32 R002 R111 R203 R602 R203 * R111 *
33 R603 R107 R603 R602 R203 * R002 *
34 R302 R202 R302 R002 R111 * R111 *
35 R302 R405 R111 R002 R111 * R002 *
36 W501 R603 R203 R111 R111 * R405 *
PA PB PC PD PE PF
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Front end of CPU Backplane