SAC.CCSO-OLA@E.ISI.EDU (11/21/88)
Well, gang, I figured out the problems which plagued my North Star Horizon. In an earlier post, I sent out a plea for help with my 64K North Star, running NS CP/M 2.2. Anyways, the answer was: I had 16K of RAM addressed incorrectly. The 64K is in 4 16K boards. One of the boards, the 16K at 08000h, had its address switches set wrong. (Bloody gremlins!) I really don't recall touching the switches, but fiddling around inside it's possible to do nearly any adjustment by accident! The missing 16K, where everybody thought 16K oughta be, caused lots of problems which would only manifest themselves in programs or data that needed that bank. Hence, the sporadic nature of the bug. (Gosh! To think that the machine could limp, let alone run well most of the time, with one- fourth of its memory absent...amazing!) >JS< ======================================================================= John L. Schuncke, Jr. SSgt USAF | Where I is: Communications programmer | Command and Control Systems Office extrordinaire | SAC.CCSO-OLA@E.ISI.EDU ======================================================================= Disclaimer: "C'mon, I'm just an NCO. Do I look like I know what's going on?" +----------------+ | A> PIP | | * NUL:=Flames | | *^C | +----------------+