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Articles / TULARC / PC info / Motherboards / Motherboards / |  |
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CLASS 3421 Motherboard Settings and Configuration |
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Articles / TULARC / PC info / Motherboards / Motherboards / | |
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CLASS 3421 Motherboard Settings and Configuration |
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NCR CORPORATION
CLASS 3421
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Processor |
80386SX |
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Processor Speed |
20MHz |
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Chip Set |
NCR |
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Max. Onboard DRAM |
8MB |
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Cache |
None |
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BIOS |
AMI |
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Dimensions |
381mm x 254mm |
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I/O Options |
Serial port, parallel port, PS/2 mouse port, SCSI interface (2), floppy drive interface, CPU upgrade slot, proprietary SIMM sockets (3) |
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NPU Options |
80387SX |
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CONNECTIONS |
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Purpose |
Location |
Purpose |
Location |
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Video controller |
CN1 |
IDE/floppy drive power |
CN8 |
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Internal SCSI interface |
CN2 |
FS1 header |
JP1 |
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External SCSI interface |
CN3 |
SCSI terminating resistors |
R1, R2, R3 |
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Serial port |
CN4 |
Proprietary SIMM socket |
S1, S2, S3 |
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Parallel port |
CN5 |
MCA slot |
S4, S5, S6, S7 |
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PS/2 mouse port |
CN6 |
CPU upgrade slot |
S8 |
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Floppy drive interface |
CN7 |
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Note: Pin 1 locations unverified. |
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DRAM CONFIGURATION |
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Size |
Bank 0 |
S1 |
S2 |
S3 |
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2MB |
2MB |
NONE |
NONE |
NONE |
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4MB |
2MB |
(1) 1M x 18 |
NONE |
NONE |
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6MB |
2MB |
(1) 1M x 18 |
(1) 1M x 18 |
NONE |
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8MB |
2MB |
(1) 1M x 18 |
(1) 1M x 18 |
(1) 1M x 18 |
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Note: Bank 0 factory installed and is not configurable. Locations and individual chip sizes for Bank 0 inside DRAM area are unknown. |
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CLASS 3421 , motherboard, processor, socket, pentium, pentium pro, celeron, powerpc, alpha, 8088, 8086, 286, 386, 486, configuration, RAM, DRAM, floppy, jumper, connections
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