13.022 I just received my Sirius RAM card and populated it with 8 1MB SIMMS. However my ROM 3 GS crashes early in the boot process. Could it be a problem with my RamFAST and DMA?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
13.022 I just received my Sirius RAM card and populated it with 8 1MB SIMMS. However my ROM 3 GS crashes early in the boot process. Could it be a problem with my RamFAST and DMA?
First, if your RamFAST is the Rev. C (full-length) card, it cannot DMA to
8MB; so, you will have to turn DMA off. The Rev. D can DMA to 8MB fine.
Second, make sure there are 8 SIMMs on the Sirius. Alltech used to say
that you are supposed to take out one of the SIMMs when using the 8MB Sirius
card on a ROM 3; but, this leads to problems. Plug in all 8 SIMMs and use it
that way. You lose the 1MB from the motherboard this way, but you gain it back
on the 'extra' SIMM you put in.
By: Supertimer
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