Re: RAM problem (P500)

From: B. Degnan (
Date: 2006-06-25 21:49:06

I recall that you said that this system was labeled defective (from your 
earlier post)...perhaps you're simply confirmed the original tech's 
assessment of the system after installing the RAM.  What are the BASIC ROM 
chip identification numbers and what slots do you have them installed?  I 
will compare with what I have.  Our P500's were probably produced in the 
same week and should have the same chips.
Bill D

At 06:32 PM 6/25/2006 +0200, you wrote:
>I'm working on my P500. After I bought it I found out that it had no RAM
>at all. This weekend I installed 16 sockets and 16 RAM chips. After
>turning on the P500 I got the boot screen after about 5 seconds.
>When I type in a small BASIC program with a PRINT statement I can do a
>LIST and the program is listed normaly. But when I run it prints garbage
>on the screen. Also variables are not handled right.
>If I POKE from 0 to 2047 I can PEEK back the right value but above 2047 I
>get wrong values back.
>Is this a problem with the RAM chips or with the MUX (4 x 74S153).
>Does anybody have an idea ?

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