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# AST RESEARCH, INC.
CUPID Tower ISA 486/25 and 486/33 (version 1) Model 202352-001
Processor 80486DX (on external CPU/Memory module)
Processor Speed 25/33MHz
Chip Set AST
Max. Onboard None (16MB on external CPU/Memory module)
DRAM
SRAM Cache None
BIOS AST
Dimensions 355mm x 266mm
I/O Options 32-bit external CPU/Memory module slot,
32-bit external Memory module slot (2),
floppy drive interface, IDE interface,
parallel port, serial port (2)
NPU Options 4167 (on external CPU/Memory module)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| IDE interface | P1 | Serial port 1 | P11 |
| | | (COM1) | |
|------------------+----------+-------------------+----------|
| Parallel port | P2 | Serial port 2 | P12 |
| | | (COM2) | |
|------------------+----------+-------------------+----------|
| Third floppy | P3 | IDE interface LED | P13 |
| drive interface | | | |
|------------------+----------+-------------------+----------|
| Floppy drive | P4 | 32-bit external | S1 |
| interface (A: | | CPU/Memory module | |
| and B:) | | | |
|------------------+----------+-------------------+----------|
| Front panel | P5 | 32-bit external | S2 & S3 |
| switches & LEDs | | Memory module | |
| | | slots | |
|------------------+----------+-------------------+----------|
| Speaker | P6 | Optional ROM | U4 |
| | | (even) | |
|------------------+----------+-------------------+----------|
| External battery | P8 | Optional ROM | U5 |
| | | (odd) | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
| | SW1 | |
|-------------------------------------+-----------+----------|
| » | Factory configured - do not | switch 1 | open |
| | alter | | |
|---+---------------------------------+-----------+----------|
| » | Password check enabled | switch 2 | closed |
|---+---------------------------------+-----------+----------|
| | Password check disabled | switch 2 | open |
|---+---------------------------------+-----------+----------|
| » | Factory configured - do not | switch 3 | open |
| | alter | | |
|---+---------------------------------+-----------+----------|
| » | Keyboard select installed | switch 4 | open |
|---+---------------------------------+-----------+----------|
| » | Keyboard select not installed | switch 4 | closed |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------------+-----------+------------|
| » | Parity check enabled | E1 | closed |
|-----+-----------------------------+-----------+------------|
| | Parity check disabled | E1 | open |
|------------------------------------------------------------|
| Note:AST CPU/Memory module part number is 202361-002, |
| 202361-005, or 202361-006 for 25MHz |
| |
| systems or 202361-004 or 202361-007 for 33MHz systems. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|---------------+----------------------+---------------------|
| 2MB | (2) 1M x 9 | NONE |
|---------------+----------------------+---------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|---------------+----------------------+---------------------|
| 8MB | (2) 4M x 9 | NONE |
|---------------+----------------------+---------------------|
| 10MB | (2) 1M x 9 | (2) 4M x 9 |
|---------------+----------------------+---------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
|------------------------------------------------------------|
| Notes:128KB of DRAM is reserved for System and VGA BIOS |
| shadowing and cannot be disabled. |
| |
| Up to two of the following memory boards may be installed |
| in addition to the CPU/Memory |
| |
| module: AST part numbers 202275-002, 202275-004, |
| 202275-006, 202387-001, |
| |
| or 202387-005. |
+------------------------------------------------------------+