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 |