caasnsr@nmtsun.nmt.edu (Clifford Adams) (08/14/88)
In article <1239@ficc.UUCP> peter@ficc.UUCP (Peter da Silva) writes: >If anyone out there has a Compucolor-2 (a Z-80 based PC from the early >'80s) you can implement HACF from Basic: >10 FOR I = 1 TO 255: OUT 6,I: NEXT An even shorter sequence was possible on one model of the Commodore PET personal computer. All that was needed was to place a certain value xxx into memory location yyy. Several hours later one of the video chips would be dead. The instruction was: POKE xxx,yyy Apparently the value yyy would put the chip into an adjustment mode, which increased the frequency of a certain function. Faster and faster.....till meltdown. What was really interesting is that COMPUTE! magazine (back when it was good) had an article about this function, *giving the exact values for xxx and yyy*! (perhaps that's why I can't find any PETs :-) >Peter da Silva, Ferranti International Controls Corporation, >sugar!ficc!peter. -- Clifford A. Adams --- "I understand only inasmuch as I become." ForthLisp Project Programmer (Goal: LISP interpreter in Forth) caasnsr@nmtsun.nmt.edu ...cmcl2!lanl!unm-la!unmvax!nmtsun!caasnsr