Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA 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] ------