COMMODORE BUSINESS MACHINES, INC. ================================= 386DX System (Part #368954-01) Processor 80386DX Processor Speed 25/33MHz Chip Set PC CHIPS Max. Onboard 32MB DRAM SRAM Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port (2), VGA port NPU Options 80387/3167 +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |---------------+----------+----------------------+----------| | VGA port | C1 | PS/2 style mouse | C5 | | | | port | | |---------------+----------+----------------------+----------| | Serial port 1 | C2 | Floppy drive | C6 | | | | interface | | |---------------+----------+----------------------+----------| | Serial port 2 | C3 | Hard drivve | C7 | | | | interface | | |---------------+----------+----------------------+----------| | Parallel port | C4 | Basic connectors | C8 | | | | (pins unknown) | | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER CONFIGURABLE SETTINGS | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Combined BIOS enabled | J7 | closed | |---+----------------------------------+--------+------------| | | Combined BIOS disabled | J7 | open | |---+----------------------------------+--------+------------| |>> | Monitor type select color | J14 | pins 1 & 2 | | | | | closed | | | | J20 | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | Monitor type select color | J14 | pins 2 & 3 | | | disabled | | closed | | | | J20 | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | J17 | unknown | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | J18 | unknown | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | J19 | unknown | | | alter | | | |---+----------------------------------+--------+------------| |>> | Factory configured - do not | J31 | unknown | | | alter | | | |---+----------------------------------+--------+------------| |>> | VGA select zero wait states | J23 | closed | |---+----------------------------------+--------+------------| | | VGA select zero wait states | J23 | open | | | disabled | | | |---+----------------------------------+--------+------------| |>> | Monitor type select monochrome | J30 | open | |---+----------------------------------+--------+------------| | | Monitor type select monochrome | J30 | closed | | | disabled | | | |---+----------------------------------+--------+------------| |>> | Floppy drive interface (C6) | J41 | pins 1 & 2 | | | enabled | | closed | |---+----------------------------------+--------+------------| |>> | Floppy drive interface (C6) | J41 | pins 2 & 3 | | | disabled | | closed | |---+----------------------------------+--------+------------| |>> | Hard drive interface (C7) | J43 | closed | | | enabled | | | | | | J44 | closed | |---+----------------------------------+--------+------------| | | Hard drive interface (C7) | J43 | open | | | disabled | | | | | | J44 | open | +------------------------------------------------------------+ +------------------------------------------------------------+ | DRAM CONFIGURATION | |------------------------------------------------------------| | Size | Bank 0 | Bank 1 | |------------------+--------------------+--------------------| | 1MB | (4) 256K x 9 | NONE | |------------------+--------------------+--------------------| | 2MB | (4) 256K x 9 | (4) 256K x 9 | |------------------+--------------------+--------------------| | 4MB | (4) 1M x 9 | NONE | |------------------+--------------------+--------------------| | 5MB | (4) 256K x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 5MB | (4) 1M x 9 | (4) 256K x 9 | |------------------+--------------------+--------------------| | 8MB | (4) 1M x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 16MB | (4) 4M x 9 | NONE | |------------------+--------------------+--------------------| | 17MB | (4) 256K x 9 | (4) 4M x 9 | |------------------+--------------------+--------------------| | 17MB | (4) 4M x 9 | (4) 256K x 9 | |------------------+--------------------+--------------------| | 20MB | (4) 1M x 9 | (4) 4M x 9 | |------------------+--------------------+--------------------| | 20MB | (4) 4M x 9 | (4) 1M x 9 | |------------------+--------------------+--------------------| | 32MB | (4) 4M x 9 | (4) 4M x 9 | +------------------------------------------------------------+ +------------------------------------------------------------+ | SERIAL PORT CONFIGURATION | |------------------------------------------------------------| | Function | Jumper | Position | |--------------------------------------+--------+------------| |>> | Serial port 1 (C2) enabled at | J27 | closed | | | interrupt IRQ4 | | | |---+----------------------------------+--------+------------| | | Serial port 1 (C2) disabled | J27 | open | |---+----------------------------------+--------+------------| |>> | Serial port 2 (C3) enabled at | J29 | closed | | | interrupt select IRQ3 | | | |---+----------------------------------+--------+------------| | | Serial port 2 (C3) disabled | J29 | open | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 1 (C2) select COM1 | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 2 (C3) select COM2 | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 1 (C2) select COM2 | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 1 (C2) select COM1 | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 2 & 3 | | | | | closed | | | Serial port 1 (C2) select COM1 | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 2 & 3 | | | | | closed | | | Serial port 2 (C3) disabled | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 1 (C2) disabled | J39 | | | | | | pins 2 & 3 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 2 (C3) select COM1 | J39 | | | | | | pins 2 & 3 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 1 (C2) disabled | J39 | | | | | | pins 2 & 3 | | | | J40 | closed | | | | | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 1 & 2 | | | | | closed | | | Serial port 2 (C3) select COM2 | J39 | | | | | | pins 2 & 3 | | | | J40 | closed | | | | | | | | | | pins 1 & 2 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 2 & 3 | | | | | closed | | | Serial port 1 (C2) select COM2 | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 2 & 3 | | | | | closed | | | Serial port 2 (C3) disabled | J39 | | | | | | pins 1 & 2 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | |---+----------------------------------+--------+------------| | | | J38 | pins 2 & 3 | | | | | closed | | | Serial port 1 & 2 disabled | J39 | | | | | | pins 2 & 3 | | | | J40 | closed | | | | | | | | | | pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | PARALLEL PORT CONFIGURATION (C4) | |------------------------------------------------------------| | Function | Jumper | Position | |-----------------------------------+--------+---------------| |>> | Parallel port enabled at IRQ7 | J28 | pins 2 & 3 | | | | | closed | |---+-------------------------------+--------+---------------| | | Parallel port enabled at IRQ5 | J28 | pins 1 & 2 | | | | | closed | |---+-------------------------------+--------+---------------| | | Parallel port enable LPT1 | J36 | pins 2 & 3 | | | | | closed | | | | J37 | | | | | | pins 1 & 2 | | | | | closed | |---+-------------------------------+--------+---------------| | | Parallel port enable LPT2 | J36 | pins 1 & 2 | | | | | closed | | | | J37 | | | | | | pins 1 & 2 | | | | | closed | |---+-------------------------------+--------+---------------| | | Parallel port enable LPT3 | J36 | pins 1 & 2 | | | | | closed | | | | J37 | | | | | | pins 2 & 3 | | | | | closed | |---+-------------------------------+--------+---------------| | | Parallel port disabled | J36 | pins 2 & 3 | | | | | closed | | | | J37 | | | | | | pins 2 & 3 | | | | | closed | +------------------------------------------------------------+ +----------------------------------------------------------------+ | SRAM JUMPER CONFIGURATION | |----------------------------------------------------------------| | Size |Jumper|Jumper|Jumper|Jumper|Jumper|Jumper|Jumper|Jumper| | | J8 | J9 | J11 | J12 | J13 | J15 | J16 | J42 | |--------+------+------+------+------+------+------+------+------| |Disabled|closed|pins 1|pins 1| N/A | N/A | open | N/A | N/A | | | | & 2 | & 2 | | | | | | | | |closed|closed| | | | | | |--------+------+------+------+------+------+------+------+------| | 64KB |closed|pins 2|pins 2|pins 1|pins 1|closed|pins 2|pins 1| | | | & 3 | & 3 | & 2 | & 2 | | & 3 | & 2 | | | |closed|closed|closed|closed| |closed|closed| |--------+------+------+------+------+------+------+------+------| | 128KB |closed|pins 2|pins 2|pins 2|pins 1|closed| open |pins 2| | | | & 3 | & 3 | & 3 | & 2 | | | & 3 | | | |closed|closed|closed|closed| | |closed| |--------+------+------+------+------+------+------+------+------| | 256KB |closed|pins 2|pins 2|pins 2|pins 1|closed|pins 1|pins 2| | | | & 3 | & 3 | & 3 | & 2 | | & 2 | & 3 | | | |closed|closed|closed|closed| |closed|closed| +----------------------------------------------------------------+ +------------------------------------------------------------+ | SRAM CONFIGURATION | |------------------------------------------------------------| | Size | Cache SRAM | Location | TAG (UAA) | TAG (U11) | |-------+-------------+------------+------------+------------| | 64KB | (8) 8K x 8 | Banks 0 & | (1) 8K x 8 | (1) 8K x 8 | | | | 1 | | | |-------+-------------+------------+------------+------------| | 128KB | (4) 32K x 8 | Bank 0 | (1) 32K x | NONE | | | | | 8 | | |-------+-------------+------------+------------+------------| | 256KB | (8) 32K x 8 | Banks 0 & | (1) 32K x | (1) 32K x | | | | 1 | 8 | 8 | +------------------------------------------------------------+ +------------------------------------------------------------+ | VIDEO SWITCH CONFIGURATION (SW1) | |------------------------------------------------------------| | Mode |switch 1|switch 2|switch 3|switch 4|switch | | | | | | | 5 | |----------------+--------+--------+--------+--------+-------| | 56Hz vertical | open | open | N/A | N/A | N/A | | refresh | | | | | | |----------------+--------+--------+--------+--------+-------| | 60Hz vertical | open | closed | N/A | N/A | N/A | | refresh | | | | | | |----------------+--------+--------+--------+--------+-------| | 72Hz vertical | closed | open | N/A | N/A | N/A | | refresh | | | | | | |----------------+--------+--------+--------+--------+-------| | Enable | N/A | N/A | open | open | N/A | | interlaced | | | | | | |----------------+--------+--------+--------+--------+-------| | 60Hz | N/A | N/A | open | closed | N/A | | non-interlaced | | | | | | |----------------+--------+--------+--------+--------+-------| | 72Hz | N/A | N/A | closed | open | N/A | | non-interlaced | | | | | | |----------------+--------+--------+--------+--------+-------| | 31.5KHz | N/A | N/A | N/A | N/A | open | |horizontal scan | | | | | | | rate | | | | | | |----------------+--------+--------+--------+--------+-------| |40KHz horizontal| N/A | N/A | N/A | N/A |closed | | scan rate | | | | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | VRAM CONFIGURATION | |------------------------------------------------------------| | Size | VRAM | SW1/switch 6 | |------------------+--------------------+--------------------| | 512KB | (2) 256K x 4 | closed | |------------------+--------------------+--------------------| | 1MB | (4) 256K x 4 | open | +------------------------------------------------------------+