A2091 SCSI ram install

[melott]

Installing some ram to my A2091 SCSI card

I have the chips but I've checked the hardware sites
to see how it should be installed........

For 512K
For 1 meg

For 2 megs its obvious :-)

Mel

[melott]

davideo wrote:
You need to set the Jumper 1 for the size of ram fitted. See picture here http://amiga.resource.cx/photos/a2091 the Jumper is on the top edge just in front of the 2 chips with labels stuck on them.

The ram chips are fitted in columns from the inside of the board outwards. 1st row = 512k, 1st and 2nd = 1Meg, all 4 columns full = 2Meg.

Hope that helps, Dave G 8-)

...yes ... very much

Thanks

Mel

[melott]

JimS wrote:
Commodore's service notes recommend only using the 0 or 2MB settings. Seems there's a bug in the RAM autoconfig for the 2091 board. They say that if you must use the .5MB or 1MB settings, make sure the 2091 is in the first slot.. in rev4 & 6 motherboards, this is the one closest to the power supply.

-Jim

Would this problem have anything to do with earlier vs latest roms ?


Mel