Date   : Fri, 01 Mar 1985 10:12:00 EST
From   : brake@ari-hq1.ARPA
Subject: Dynamic Memory

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]