hodas@eniac.seas.upenn.edu (Josh Hodas) (06/07/89)
I seem to have lost my notes on what the interpretation of the "mach" resource used in cdevs is. I though it was in a technote somewhere, but when I checked my TTN stack it wasn't there. COuld some kind soul just send me a quick note with the bit patterns? Josh ------------------------- Josh Hodas (hodas@eniac.seas.upenn.edu) 4223 Pine Street Philadelphia, PA 19104 (215) 222-7112 (home) (215) 898-5423 (school office)
tomj@oakhill.UUCP (Tom Johnson) (06/08/89)
In article <11736@netnews.upenn.edu> hodas@eniac.seas.upenn.edu (Josh Hodas) writes: > >I seem to have lost my notes on what the interpretation of the "mach" >resource used in cdevs is. I though it was in a technote somewhere, >but when I checked my TTN stack it wasn't there. > >COuld some kind soul just send me a quick note with the bit patterns? > >Josh According to IM-V pg 328: Softmask Hardmask Action -------- -------- -------------------------- 0 $FFFF always call cdev with macDev message $FFFF $0000 appear on all machines $7FFF $0400 appear on all machines with ADB $3FFF $0000 appear on macII only The cdev will show up if every bit that is "0" in Softmask is also "0" in ROM85 global, and every bit that is "1" in Hardmask is also "1" in the low memory global HwCfgFlgs. Hope this helps. --tomj