5150 Not Passs Mem Refresh Test

[KLund1]

FC000 = BASIC chip U32. There are couple of BASIC sets at [here].

I have a 5700043 in U32 on this board. I downloaded and burned the matching file from your link above(IBM '81, C1.00) to an eprom, a 2732. I get the same error. I burned a few others from different manufactures and got the same result. But they were all 2732's. Should I buy a 8K eprom?

 

[modem7]

I have a 5700043 in U32 on this board. I downloaded and burned the matching file from your link above(IBM '81, C1.00) to an eprom, a 2732. I get the same error. I burned a few others from different manufactures and got the same result. But they were all 2732's. Should I buy a 8K eprom?

The code is 8 KB sized, and so at minimum, you will need a 2764 (with adapter). But you can use a 27128 (with adapter) if you double up the 8 KB code in the 27128. Or use a 27256 (with adapter) if the code is quadrupled.

[ At [here] is show an example method of quadrupling. ]