[an error occurred while processing this directive] [an error occurred while processing this directive] PDP-8 CPU Module Map [an error occurred while processing this directive] [an error occurred while processing this directive] [an error occurred while processing this directive]
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PDP-8 CPU Module Maps

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[an error occurred while processing this directive] Part of [an error occurred while processing this directive] the PDP-8 Hardware Documentation
[an error occurred while processing this directive] See also [an error occurred while processing this directive] (none)
[an error occurred while processing this directive] [an error occurred while processing this directive] (none) Douglas W. Jones [an error occurred while processing this directive] (none)
[an error occurred while processing this directive] (none)
THE UNIVERSITY OF IOWA Department of Computer Science [an error occurred while processing this directive] and (none) [an error occurred while processing this directive]

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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!

PDP-8 Maintenance Manual Preliminary, F-87P2, 1965

Processor Utilization Module List UML-E-8P-0-19

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

        Top                                     Bottom
        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
        Top                                     Bottom


                Front end of CPU Backplane

PDP-8 Maintenance Manual, F-87, 2/66

Processor Utilization Module List UML-E-8P-0-19

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

        Top                                     Bottom
        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
        Top                                     Bottom

                Front end of CPU Backplane