[MAME]

Space Guerrilla PCB Layout
--------------------------

All PCBs slot into a metal frame. Each PCB is joined by the 14way/28way edge connectors
on one side, and the 50 pin connectors via flat cables on the other side.

                       14-way
OEC-5            |----------------|
|----------------|----------------|-----------------|
|      1       2       3       4       5      6     |
|A   74273   7417             555                   |
|                                                   |
|B   74273   7417     555     7493    76477  LM380  |
|                                                   |
|C   DIP16   74121    4066    7400           4030   |
|                                                   |
|D   LM324   LM324    LM3900  LM3900  458    4006   |
|                                                   |
|                                                   |
|                                                   |
|                                                   |
| VR1   VR2   VR3   VR4   VR5   VR6   VR7    VOL    |
|---------------------------------------------------|

Notes:
      DIP16 - Joins to DIP16 socket at 3F on IOC2-A PCB via a 16-wire flat cable.
      VR1-7 - Potentiometers for volume of sounds
      VOL   - Master Volume
      Note PCB also contains a lot of resistors, transistors, capacitors etc



                            28-way
IOC2-A           |-----------------------------|
|----------------|-----------------------------|----------------|
|      1         2       3       4       5      6      7        |
|A     DIP16   DIP16   DIP16   DIP16                            |
|                                                           VR1 |
|B     D1-8    7404    7404    7404    LM324          4066      |
|                                                               |
|C     D9-16   74240   7406    DIP8           LM324         VR2 |
|                                                               |
|D     74240   74240   74175   75472   555           555        |
|                                                               |
|E     DSW1    74240   74273   7417                         VR3 |
|                                                               |
|F     DIP16   DIP16   DIP16   555     458    LM3900   LM3900   |
|                                                               |
|G     74244   74244   7432    555                          VR4 |
|                                                               |
|H                                                              |
|                                                               |
|                                                               |
|  |-------------|                                              |
|--|-------------|----------------------------------------------|
      50 pin

Notes:
      DIP8 - Unpopulated position for DIP8 IC
      DIP16- Unpopulated position for DIP16 IC
      D1-16- Diodes
      VR1-4- Potentiometers for volume of sounds



                            28-way
CRTC1-A          |-----------------------------|
|----------------|-----------------------------|----------------|
|   1      2      3      4      5      6      7      8      9   |
|A 20MHz  7455   Diodes 1-4   DIP16  DIP16  DIP16  4027   4027  |
|                      &                                        |
|B 74163  7404   Transtrs 1-7 DIP16  DIP16  DIP16  4027   4027  |
|                                                               |
|C 7486   74161  7404         DIP16  DIP16  DIP16  4027   4027  |
|                                                               |
|D 7486   74161  7408      82S09     74374  74157  4027   4027  |
|                                                               |
|E 7486   74161  7402  7411   74157  74377  7408   4027   4027  |
|                                                               |
|F 7486   74161  7411  74157  74244  74377  7400   74153  74157 |
|                                                               |
|G 74107  7404   7474  74175  74107  74157  7404   74377  74157 |
|                                                               |
|H 7404   7404   74244 74139  7404   7427   7474   74164  7404  |
|                                                               |
|                                                               |
|  |-------------|       |-------------|       |-------------|  |
|--|-------------|-------|-------------|-------|-------------|--|
      50 pin                 50 pin                50 pin

Notes:
      4027 - MOSTEK MK4027-4 RAM (DIP16)
      DIP16- Unpopulated position for DIP16 IC



                            28-way
CRTC2-A          |-----------------------------|
|----------------|-----------------------------|----------------|
|   1      2      3      4      5      6      7      8      9   |
|A 7402  74377  74157  7400   74194  74S288        4027   4027  |
|                                                               |
|B 7486  74153  7486   7400   74194  74S288        4027   4027  |
|                                                               |
|C 7408  74374  74158         74273  7427          4027   4027  |
|                                                               |
|D 7400  74244  25S10  74181  7430   7408          4027   4027  |
|                                                               |
|E 7400  74153  25S10  74181         7402          4027   4027  |
|                                                               |
|F 7408  74153         7411   7404   7404          4027   4027  |
|                                                               |
|G 7404  74153  DIP16  74153  74153  74283         4027   4027  |
|                                                               |
|H 74138 74244  7474   74153  74153  74157         4027   4027  |
|                                                               |
|                                                               |
|  |-------------|       |-------------|       |-------------|  |
|--|-------------|-------|-------------|-------|-------------|--|
      50 pin                 50 pin                50 pin

Notes:
      74S288 - 32bytes x8 Bipolar PROM (DIP16, both PROMs contain identical contents)
      4027   - MOSTEK MK4027-4 RAM (DIP16)



                            28-way
SBC-A            |-----------------------------|
|----------------|-----------------------------|----------------|
|   1      2      3      4      5      6      7      8      9   |
|A 74161        DIP18  4045   4045                 ROM2   ROM1  |
|                                                               |
|B 7404  7402   74139  DIP18  DIP18                ROM4   ROM3  |
|                                                               |
|C 7404  7404   7420   4045   4045                 ROM6   ROM5  |
|                                                               |
|D              7420   DIP18  DIP18                ROM8   ROM7  |
|                                                               |
|E 74241 74241         8216   8216                 DIP24  DIP24 |
|                                                               |
|F    Z80              74241                       DIP24  DIP24 |
|                                                               |
|G       7407          74241                       ROM14  ROM13 |
|                                                               |
|H                     74241  7442   7442   74244  ROM16  ROM15 |
|                                                               |
|                                                               |
|  |-------------|       |-------------|                        |
|--|-------------|-------|-------------|------------------------|
      50 pin                 50 pin

Notes:
      4045 - TMS4045-45NL RAM (DIP18)
      8216 - Mitsubishi M5L8216 RAM (DIP16)
      DIP18- Unpopulated position for DIP18 IC
      DIP24- Unpopulated position for DIP24 IC
      All ROMs type 2708 (DIP24)

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