fate7@swbell.net wrote:
> Hi... any one have any compatibility problems with a ZipGSX and ROM 3?

No.

> Actually, I don't even get to the initial blue boot up screen on the 3, just a jigsaw of low-res colored pixels. Any ideas?

The Low res colored pixels usually indicate that the CPU is not in place 
or not clocking.  Verify the cpu plug is in place and that the crystal 
is attached and in place.

Also try inserting the Zip in your Rom 1 to verify it works.

Thankx,
Ed

Quoted from the CSA2 FAQ on accelerators:

The normally recommended SW1 settings are identical to the factory 
default settings except for SW1-4 ...

ON    x     x  x     x  m  m
OFF      x        x     m  m
       1  2  3  4  5  6  7  8

1- Cxxx/Dxxx Cache: ON= enabled.
2- Defeat Joystick delay: OFF= allow delay.
3- Defeat AppleTalk delay: ON= no delay.
4- Defeat Counter Delay: ON= no delay. Set OFF to pass IIgs diagnostic 
self-test #05 ("Speed Test").
5- Defeat CPS Follow: OFF for floppy drives to work.
6- ZipGS enable: ON. Set OFF to allow powerup boot in
    slow mode.

7 & 8- Set these to installed Zip cache memory size:

ON  ON    8k
ON  OFF  16k
OFF ON   32k
OFF OFF  64k


The factory default SW2 settings are ...

ON    x     x  x  x     x
OFF      x           x     x
       1  2  3  4  5  6  7  8


SW2-1 through SW2-7 control whether a card in Slot 1-7 is accessed at 
full speed (set ON) or "normal" speed (set OFF)*.

SW2-8 sets Defeat Speaker Delay. To play 'old Apple' music and effects 
correctly, the switch should be OFF to permit the delay.

*Note: Whether or not a particular card can work without a slow-down is 
  something you can determine by experimentaton. This is easiest using 
the Zip CDA accessed via the Desk Accessories menu OpenApple- Control- 
Escape). The CDA settings are not permanent. Once you find the settings 
you like, you can turn OFF the computer and set the switches on the 
board to match the settings that work best.



Ed Eastman wrote:
> fate7@swbell.net wrote:
> 
>> Hi... any one have any compatibility problems with a ZipGSX and ROM 3?
> 
> No.

One more thing, although I have 32k cache chips, the thing will only 
work at higher speeds with it set for 8k cache.  It locks up otherwise 
so I figured the board itself has issues at higher speeds.

Thankx,
Ed