Installation manual

Testing and Troubleshooting
Test Display
You should see sixteen 64K auxiliary bank indicators on the status display
screen numbered from 0 to 15 (see Figure 3.1). Since the Apple’s 6502
processor Cannot address more than 64K of memory at a time, the Apple
swaps memory banks into and out of its addressing range in order to use
MultiRam RGB memory. Therefore, the auxiliary bank indicators show
MultiRam RGB auxiliary memory as the Apple sees it -- one bank at a time,
not 128K or 512K or any amount of memory larger than 64K.
MultiRam RGB Card
Individual Bank
Bank Groups
0=64K 4=64K 5=64K 6=64K = A 256K
1=64K 7=64K 8=64K 9=64 = B 256K
2=64K 10=0K 11=0K 12=0K = C 64K
3=64K 13=0K 14=0K 15=0K = D 64K
Total 640K
[1]See Status [2]80-col test [3]Menu
Test: [4]Quick [5]Full [6lContinuous
RETURN ARROWS SPACE BAR ESCAPE
starts select pause/resume cancel
Status Page Before Testing
Figure 3.1
The usable memory in RAM Groups A, B, C and D is identified on the status
screen and the total usable memory available on the card is shown. Upon boot-
up, question marks appear instead of numbers in both the 64K auxiliary bank
and RAM Group status indicators as the card has not yet been tested.
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