Re: Program for testing RAM memory...

From: Rainer Buchty (
Date: 2001-10-12 20:11:34

> If you tell me how to do it, I can try.

Supposing, you now the memory layout of the VIC20 (which I don't):

10 FOR i=mem_start TO mem_end
20 POKE i,0:IF PEEK(i)<>0 THEN ?"Can't clear memory location ";i
30 POKE i,255:IF PEEK(i)<>255 THEN ?"Can't set memory location ";i
40 POKE i,85:IF PEEK(i)<>85 THEN ?"Pattern 0x55 failed on memory location";i
50 POKE i,170:IF PEEK(i)<>170 THEN ?"Pattern 0xaa failed on memory location";i
60 NEXT i

where mem_start and mem_end are the appropriate values for the memory area
to test.


(Hell, I really had to think how to do the not-equal comparison and append
a variable to a string in BASIC... Haven't used that language for years
now :)


Rainer Buchty, LRR, Technical University of Munich
currently at
		Agere Systems
		Processor Architectures and Compiler Research
		600 Mountain Avenue, Room 7A-312
		Murray Hill NJ 07974

		Phone: 1 (908) 582-4422		Dept. Fax: -4092

       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail 2.1.1.