IBM 5155 64kb detected.

[twistedpneumatic]

Hi guys,

My 5155 only counts up to 64KB. I just swapped RAM from bank 1 and bank 3. Still no change. Granted both banks could have a faulty chip...but where do I go that isn't buying 36 ICs?

 

[twistedpneumatic]

Changed the dipswitches to 3/4 to off. Now it wont boot . Changed them back to no avail.

 

[twistedpneumatic]

False alarm....I just accidentally pushed switch 5 so it was looking for an MDA card. Flipped 3/4 back again and its posting 256K.

 

[asmpgm]

If your system has a rocker type system board switch, it might pay to double check it and make sure positions 3 & 4 are clicked completely off.