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RE: [N8VEM-S100:6420] AIRBL 8080a boot loader ROM



Just swap the two chips that are on the board.  Move the low bank to the high bank, and vise-a-versa.
I found the bug in the RAM Test.... upon fail, it jumps to a print routine where it nukes the value in HL (where the RAM test failed to compare).  This is why it's coming up with 045C (which should be the address right after the Error Message string).



Date: Mon, 23 Feb 2015 07:58:35 -0800
From: jeffrey.h...@gmail.com
To: n8vem...@googlegroups.com
Subject: Re: [N8VEM-S100:6420] AIRBL 8080a boot loader ROM

On Saturday, February 21, 2015 at 3:53:00 PM UTC-7, Crustyomo wrote:
 wait... first boot up to the monitor then test the lower RAM with the command    R 00 7F
This will test ram from page 00 to page 7F (ie 0000 to 7FFF) which is the whole lower chip. 

I ran this test twice. Passed twice.
 
Now, swap the RAM chips, and do each test again, the system RAM test and the lower RAM test...  I'm wondering if there's problems with the RAM or if the board has a timing issue?


Can you tell me which RAM chips to swap. I'll just swap the RAM chips on the board to see if the error occurs somewhere else in RAM space from the current 045C after swapping position of RAM chips.

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