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Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!panda!talcott!harvard!seismo!brl-tgr!tgr!brake@ari-hq1.ARPA
From: brake@ari-hq1.ARPA
Newsgroups: net.micro.cpm
Subject: Dynamic Memory
Message-ID: <8809@brl-tgr.ARPA>
Date: Fri, 1-Mar-85 10:26:23 EST
Article-I.D.: brl-tgr.8809
Posted: Fri Mar  1 10:26:23 1985
Date-Received: Mon, 4-Mar-85 06:02:02 EST
Sender: news@brl-tgr.ARPA
Lines: 19

I tried to install dynamic memory in my CompuPro system (8085/8088). The
board could be strapped for up to 8 wait states so I didn't think that
I would have any problems. I figured that in the worst case 8 wait states
would be alright since the memory was so cheap. Wrong! I put the memory
at 0000H and I couldn't get the 8085 to boot under CP/M since the disk 
controller (DISK1) was too fast for the memory even with 8 wait states. 
I put the memory above my RAM16's and tried to use the 8088 (CP/M86) 
debugger to deposit values in the memory without any luck. The only way
I could get the memory to work was to run my 8085 at 2 MHZ with no wait
states. 

The lesson to be learned is that if you have a disk controller that
does DMA don't buy dynamic memory. 

Dennis    [BRAKE@ARI-HQ1]



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