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molka's MCS-86 test-board

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jrmunro

Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada

Posted: Wed Aug 10, 2016 9:19 pm Post subject:

Received the 186/188 expansion today.

Chook

Joined: 29 Oct 2008
Posts: 2250
Location: Australia

Posted: Thu Aug 11, 2016 7:22 pm Post subject:

molka wrote:

Chook wrote:

I received my tester today. All the 8086 and 8088 I have tested work, but whenever I plug in an 8087 I get a rom check sum failure error. Only the combination of a P8086 and a C8087-3 has worked.

It's maybe related to the FPUs high power consumption.
Do you use USB power supply? if so you should try powering the board with a 5V 2-3A DC adapter.

Hi, I bought a 5V power supply yesterday and now all my chips are working! Thank you.
_________________
General failure reading disk in drive A
Who's General Failure and why is he reading my disk?

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