386 PC

Old 386 PC for sale. am386-SX. The power supply had failed, so I wired in a temporary ATX. I'm able to get it POST report a missing video card if I take it out, but with the video card in it doesn't POST. Possibly dead video card? I don't have any other ISA cards to test with.

The case is in great condition for its age. No cracks, or breaks. Some minor scratches on the top from a monitor I presume, but it's held up pretty well.

Panasonic JU-257-204P Floppy Drive

TSENG Labs VGA adapter. Lists product number as 8909 Rev B on rear of PCB. Very common ET400B controller chip.

Teac FD-55GFR-570-U 5 1/4" floppy disk drive.

Huge PC COM 8-Port RS232/422 serial card with two ports

Generic hard drive and floppy disk controller, unsure of chipset.

Serial, parallel and game port controller card.

Motherboard from an unknown manufacturer. Includes the ALI M1217 chipset.

The CPU is soldered directly to the board, and does not feature a heatsink or fan.

It's an AMD am386SX-33. There's no installed co-processor.

More technical information taken from https://stason.org/TULARC/pc/motherboards/U/UNIDENTIFIED-386-386SX-25-33-ALI-M1217.html

UNIDENTIFIED

386SX-25/33 (ALI M1217)

Processor

80386SX

Processor Speed

25/33MHz

Chip Set

ALI

Video Chip Set

None

Maximum Onboard Memory

16MB

Maximum Video Memory

None

Cache

None

BIOS

AMI/Award

Dimensions

220mm x 170mm

I/O Options

None

NPU Options

80387SX

External Connections:

J4 External battery

J8 Turbo switch/LED

J6 Reset switch

J9 Power LED & keylock

J7 Speaker

Jumpers:

Address delay enabled

J5

Pins 1 & 2 closed

Address delay disabled

J5

Open

NPU synchronous with CPU

JP2

Pins 1 & 2 closed

NPU asynchronous with CPU

JP2

Pins 2 & 3 closed

CMOS chip type US1287

JP3

Closed

CMOS chip type 146818

JP3

Open

Monitor type select color

JP4

Pins 2 & 3 closed

Monitor type select monochrome

JP4

Pins 1 & 2 closed

Parity enabled

JP6

Closed

Parity disabled

JP6

Open