PS/1 MT2133A, MT2155A, MT2168A Motherboard Settings and Configuration
IBM CORPORATION
PS/1 MT2133A, MT2155A, MT2168A
Processor | 80486SX/80487SX/80486DX/80486DX2/P23T/P24T |
Processor Speed | 25/33/50(internal)/66(internal)MHz |
Chip Set | Unidentified |
Video Chip Set | Unidentified |
Maximum Onboard Memory | 32MB |
Maximum Video Memory | 1MB |
Cache | 64/256KB |
BIOS | Unidentified |
Dimensions | 330mm x 218mm |
I/O Options | Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
PS/2 mouse port | J2 | VGA feature connector | J14 |
Serial port 1 | J3 | Power LED | J26 pins 1 & 2 |
Serial port 2 | J4 | IDE interface LED | J26 pins 3 & 4 |
Parallel port | J5 | Speaker | J27 |
VGA port | J6 | Power supply | J29 |
Floppy drive interface | J7 | Power supply | J30 |
IDE interface | J9 | Riser slot | SL1 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Password normal operation | J31 | Pins 2 & 3 closed | |
Password clear | J31 | Pins 1 & 2 closed | |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
2MB | (1) 512K x 36 | None | None | None |
4MB | (1) 1M x 36 | None | None | None |
4MB | (1) 512K x 36 | (1) 512K x 36 | None | None |
6MB | (1) 512K x 36 | (1) 512K x 36 | (1) 512K x 36 | None |
8MB | (1) 2M x 36 | None | None | None |
8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
8MB | (1) 512K x 36 | (1) 512K x 36 | (1) 512K x 36 | (1) 512K x 36 |
16MB | (1) 4M x 36 | None | None | None |
16MB | (1) 2M x 36 | (1) 2M x 36 | None | None |
24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x 36 | None |
32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x 36 |
Note: Banks are interchangeable. | ||||
CACHE CONFIGURATION | ||
Size | Bank 0 | TAG |
64KB | (8) 8K x 8 | (1) 32K x 8 |
256KB | (8) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | J16 | J17 | J18 | J32 |
64KB | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed |
256KB | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
VIDEO MEMORY CONFIGURATION | |
Size | CN1 |
512KB | 512KB module installed |
1MB | 1MB module installed |
CPU TYPE SELECTION | |
Type | J23 |
80486SX | Pins 2 & 3 closed |
80487SX | Pins 2 & 3 closed |
80486DX | Pins 1 & 2 closed |
80486DX2 | Pins 1 & 2 closed |
P23T | Pins 2 & 3 closed |
P24T | Pins 1 & 2 closed |
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