Apple made 2 SCSI cards, the Highspeed one you listed that goes for $100-200 each depending on the day of the week, and a normal one (no cache) that goes for $50+ (and you have to have the C revision ROM for it to work on the IIgs).

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My IIgs have a ROM 03, I suppose that is what you're talking about? From what I saw, the SCSI card has to be plugged into the leftmost slot. I suppose there is no differences between the 2 cards you mention in term of performance, considering the age the the IIgs.

I have the normal one, works fine considering the machine its connected to. On mine I can turn the external drives off and boot directly to floppy to play games (they are all floppy based and not HD installable anyway). With the HS you need to do some things on boot or you get errors.

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So finally the HS one is not really the choice considering this boot error. Why there is that error? Strange that Apple make a card that generate error on boot...

Any SCSI card and 4MB make the IIgs a nice machine, if you just want to play games a stock IIgs with the 1MB RAM card will do nicely.

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Mine have a full memory card install, but I think it has only 1 meg on it. When I go to the control panel, in the RAM disk config, it tell me that the memory looks like 2048K. I suppose one can find chips to install in place of the one already installed and upgrade the memory card.

Another question, I plugged the IIgs with the composite output to my TV. But all display looks white on gray, even if the color mode is selected. And when I change the color it only goes from one gray to another. Any idea?