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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: cypher007 on January 08, 2020, 05:03:07 PM

Title: A500 and Baseboard 4mb. not seeing all ram [SOLVED]
Post by: cypher007 on January 08, 2020, 05:03:07 PM

i have an A500 rev 5 with a baseboard 4mb fully populated in the trapdoor and 512k onboard.

back in the day i had to fit a 8372A to get 1mb chip and i remember having to bend one pin up on that. i also had to run the wire from the Gary adaptor to the middle pad 2 of JP2 and cut the trace between 2-3.

now reading the manual again after 30 years it seems i should have linked pad 1-2 as well?

is this why when i run avail, after running cram, i see 1mb chip and 3mb fast? i would have thought it should read 1mb chip and 3.5mb fast?

its as if its not seeing the 512k chip onboard or maybe the 512k chip on the card?

Title: Re: A500 and Baseboard 4mb. not seeing all ram
Post by: cypher007 on January 09, 2020, 09:43:40 AM

solved.

needed to read the rest of the manual. i had the jumper set correctly what i needed to do was run cram with the command contig not fatter.

now have 1mb chip and 3.5mb fast.