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Chapter 3
TESTING & TROUBLESHOOTING
This chapter covers testing procedures you may use to check the RAM on your
MultiRam C Card.
This chapter should be read by everyone who has just bought and installed the
MultiRam, C Card. You should always refer back to this chapter when you add or
replace RAM on the card or if a problem develops while using the card.
RAM TEST PROCEDURE
On the back side of the disk supplied with your card, the side marked
“Utilities”, is a test program that will identify good RAM, bad or missing RAM,
and will alert you if a 64K chip has been placed into a bank of 256K RAM or
vice—Versa.
Before continuing, please make a backup copy of the Utilities side of the disk
if you have not already done so. Use The Filer on the Utility side of the
MultiRam disk or COPYA from a DOS 3.3 System Master disk to copy Utilities to a
blank disk. See your //c manual for detailed disk copying instructions.
Insert a backup copy of the Utilities disk into disk drive 1 sod boot the disk.
You will see a menu. Choose the MultiRam C test from the menu.
If the backup Utility disk does not boot correctly, does not boot at all, no
video is seen, or if the //c does not seem to be working correctly with any
software you try to boot, turn to the next section “NON—RAM PROBLEMS.” Continue
the RAM test if you see the Utility menu.
Test Display
A 40—column screen display known as the “status page” should appear.
You should see eight 64K auxiliary bank indicators on the left side of the
screen numbered from 1 to 8. Since the Apple’s 65C02 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 C memory. Therefore, the
auxiliary bank indicators show MultiRam C auxiliary memory as the Apple sees it
--one bank at a time, not 128K or 512K or any amount of memory larger than 64K.
On the right aide of the screen the usable memory in RAM Banks A and B is
identified and the total usable memory available on the card is shown. Upon
boot—up, question marks appear instead of numbers on both aides of the screen as
the card has not yet been tested (see Figure 3.1).