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Weird memory issues

Posted: 28 Aug 2020 20:07
by philbo34
In an attempt to save my sanity .
Yesterday I plugged the diag cartridge into 1 of my ste,s expected to get 1 meg . Showed 4 meg happy days . I had another with 4 X 256 k Simms in . Tried that showed 4 meg .
The icing on the cake I just tried my 4160 ste and that shows 2 meg . Am I going mad or just extremely stupid .
Most of the Simms only have 2 chips
Toshiba tc514400Asj-70.
Am I missing something basic.
I will open the 4160 up later if get chance.
Cheers

Re: Weird memory issues

Posted: 28 Aug 2020 20:13
by exxos
tc514400 1M x 4 bit. 2 chips per sim 1M x 8 bit. X 4 simms = 4MB x 8 bit.

Re: Weird memory issues

Posted: 28 Aug 2020 20:14
by philbo34
Slight update put a 2.06 ROM in the 4160 and the mem test shows 4 meg. So I'm guessing it's something on diag cart.
Or I'm a muppet

Re: Weird memory issues

Posted: 28 Aug 2020 20:15
by exxos
IIRC The cart should show 4MB.

Re: Weird memory issues

Posted: 28 Aug 2020 20:41
by philbo34
Getting out of memory errors now
I'm not going to waste people time untill every fix done first . Cheers for help