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Please need help regarding old motherboard PAT48AV-1.10

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First post, by sozza

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Please need help regarding old motherboard: PAT48AV-1.10

The data I found is:
PAT48AV Specifications

Main Processor ∙486SX, 486DX, or Cyrix M6 microprocessor for up to 50MHz.
Processor Upgrades ∙Available with a ZIF socket for a 487SX, OverDrive, 486DX2, or Pentium Overdrive processor

Cache Memory ∙8KB of on-chip cache memory
∙64K, 128K, or 256K of write-back secondary cache memory.
Main Memory ∙Up to 128MB of total main memory ∙Eight 30 pin SIMM sockets for 256Kx9, 1Mx9, 4Mx9, or 16Mx9

Expansion Slots ∙Three VL-Bus slots (Two master, one slave)
∙Seven ISA slots

current stats: some green stuff around where old battery where now got 2 cables instead no bios battery
got no clue wht to put there wht model of battery wht cabels go to + or -

no cache memory 8 socks empty
how to find 256k how to search for them ?

some data I can read is
PAT48AV-1.10
AmiBios american megatrends 486DX ISA BIOS @ 1993 AB1677229
Ali m1429 a1 9348 ts7 b15544

and got a Intel over Drive dx400pr100 c4440648 3z926v1 0 intel 89 93

pics
V8UIF8I.jpg?2

HELP please

1. how can I find 8 of l2 cache 256k any modelnr?
2. where to find a cpu fan?
3. how to connect new bios battery? wht model?
4. how to find out jumper settings?
5. ...

sorry about bad english

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Last edited by sozza on 2017-02-01, 20:07. Edited 1 time in total.

Reply 2 of 7, by Roman78

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Hello and welcome.

For the fan, as is see there is a Cooler already on it. Mostly you won't need a fan. But a fan is always better, cooler. I get my fan's mostly from defective computers, but if you don't have any, you could get some from a electronic store. Here in Germany it would be Conrad or Reichelt.

Bios battery are 3.6 volt, again from the electro store. Here some more info Old 486 CMOS Battery Low

And the jumper, well some are printed on the board itself and some are in the first link you gave. I read on the German Dosforum (just googled the mainboard number) that it max support 50 mhz, even if a 66 at 33x2 is installed.

Reply 3 of 7, by sozza

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I also without IC cache

no cache memory 8 socks empty
how to find 256k how to search for them how to know its 256k models?

Reply 5 of 7, by Robin4

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sozza wrote:

I also without IC cache

no cache memory 8 socks empty
how to find 256k how to search for them how to know its 256k models?

You can easily find cache chips on ebay.

You dont need a fan for that overdrive, how it is now it just normal..

An 50mhz probably can run just without an cooler.. Only if its written on the cpu then you have to install an heatsink with fan.. And its also not needed to use thermal paste because those 486 dont getting hot in very short time.. just a sink and fan on top is enough..

~ At least it can do black and white~

Reply 7 of 7, by sozza

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So name or type code for those cache chips for this mother board?

Robin4 wrote:
You can easily find cache chips on ebay. […]
Show full quote
sozza wrote:

I also without IC cache

no cache memory 8 socks empty
how to find 256k how to search for them how to know its 256k models?

You can easily find cache chips on ebay.

You dont need a fan for that overdrive, how it is now it just normal..

An 50mhz probably can run just without an cooler.. Only if its written on the cpu then you have to install an heatsink with fan.. And its also not needed to use thermal paste because those 486 dont getting hot in very short time.. just a sink and fan on top is enough..

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