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.

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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.

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Panasonic JU-257-204P Floppy Drive

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

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

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

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

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Serial, parallel and game port controller card.

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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

UNIDENTIFIED-386-386SX-25-33-ALI-M1217-1.png

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