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PC-104 board found

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First post, by 19rsn007

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Hi people,

I found a PC-104 board with a 386SX @40MHz with some ram which does power up but since it has no video output I can not see what it does.
It does beep, 2 short beeps then a short pause and then 8 short beeps.

Google found me this is either ram or videocard.
The last option sound reasonable to me, since it doesn't have a videochip on board or an external videocard.
I have an old ISA videocard (acumos avga2) which I don't know if it is working and an old 486 motherboard with bad battery leakage damage.
Now I am considering to build a PC-104 to ISA adapter so I can test it.

should I do this?

If it works I am thinking about building a ISA backplane for the PC-104 bus.

Reply 2 of 9, by dionb

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On a similar note: is there a specific term for PC/104 cases? I'd like to build myself a little stack of PC/104 hardware, but despite this being an old and much-used standard, I'm not having any luck finding things to build it in...

Reply 3 of 9, by imi

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I don't think there would be any specific term but "PC/104 case", these weren't really meant to go into cases anyways but to be used in other industrial or automotive equipment mostly.

Reply 4 of 9, by Marco

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386sx40? That’s new to me. Always thought they were built up to 33 only

1) VLSI SCAMP 311 | 386SX25@30 | 16MB | CL-GD5434 | CT2830| SCC-1 | MT32 | Fast-SCSI AHA 1542CF + BlueSCSI v2/15k U320
2) SIS486 | 486DX/2 66(@80) | 32MB | TGUI9440 | SG NX Pro 16 | LAPC-I

Reply 5 of 9, by 19rsn007

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Marco wrote on 2020-07-18, 19:29:

386sx40? That’s new to me. Always thought they were built up to 33 only

Well I didn't even know the had these speeds, but if the manufacturer says so....
http://advdownload.advantech.com/productfile/ … 5-L_startup.pdf

Reply 6 of 9, by debs3759

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386SX40 was only produced by AMD, and was QFP (ie soldered to the board)

See my graphics card database at www.gpuzoo.com
Constantly being worked on. Feel free to message me with any corrections or details of cards you would like me to research and add.

Reply 7 of 9, by Tiido

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PC104 to ISA is indeed quite straightforward :
http://www.tmeeco.eu/BitShit/PC104toISA.jpg
http://www.tmeeco.eu/BitShit/PC104internet.jpg

I upgraded one 386SX board to a 40MHz one not so long ago :
http://www.tmeeco.eu/BitShit/PCschit/SX25toSX40a.jpg

T-04YBSC, a new YMF71x based sound card & Official VOGONS thread about it
Newly made 4MB 60ns 30pin SIMMs ~
mida sa loed ? nagunii aru ei saa 😜

Reply 8 of 9, by pentiumspeed

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I done that same way except on a compaq LTE 386s/20 using a AMD 386SX-25 and clock generator oscillator changed and that was back in the day (around early '94)!

Cheers,

Great Northern aka Canada.

Reply 9 of 9, by Marco

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Respect for getting this soldered !!!
my sx25 vlsi board won’t exceed 30MHz unfortunately.

1) VLSI SCAMP 311 | 386SX25@30 | 16MB | CL-GD5434 | CT2830| SCC-1 | MT32 | Fast-SCSI AHA 1542CF + BlueSCSI v2/15k U320
2) SIS486 | 486DX/2 66(@80) | 32MB | TGUI9440 | SG NX Pro 16 | LAPC-I

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