danbabcock@eklektik.UUCP (/dev/ph1) (05/05/90)
gfre@pawl.rpi.edu (gregory m stiegler) wrote: >Ok, now for the big question. Does anyone have a way to slow the drives >down? The circuit seems to work fine but you can't boot. I assume the E >clock is being sped up along with the processor. Any fixes for that? >--==Niemand==-- >gfre@pawl.rpi.edu - all the following assumes kickstart 1.3 - There is a simple way to slow the drives down. Just replace the longword at address $fea176 (which used to be $6d000024) with $6d24e388. What could be easier? If you can boot (perhaps with an autobooting hard drive) but still want to slow the drives down - and can't modify kickstart - there is also a software solution. In fact, I wrote a program to do it. The program actually has the complete trackdisk.device code imbedded in it - with all absolute addresses converted to assembler labels! Then I simply pull a NoClick-like stunt to redirect the trackdisk tasks to the RAM-resident code. This also allows me to fix the infamous RawRead/RawWrite bug. If you want a copy of the program, please send me a disk (email from this site seems to be lost in a black hole...) to the address below, or contact me on People/Link. -- Dan Babcock 1106 Jefferson Road Pittsburgh, PA 15235 Phone: (412)-373-1753 People/Link: DANBABCOCK