dlnghrst@telstr.UUCP (David Langhorst) (02/25/91)
...Alot of people over on c.s.amiga.audio are concerned with the fact that the CIA A timer was taken out of the A3000. Most muzik software relies on the CIA A for it's timing....they are mostly interested in how to cope w/o it, but I was wondering why it got left out in the first place...why? ------------------------------------------------------------------------------ Ivan D Terrible - sharkey.cc.umich.edu!wybbs!telstr!dlnghrst - David Langhorst ------------------------------------------------------------------------------
riley@theory.tn.cornell.edu (Daniel S. Riley) (03/01/91)
In article <dlnghrst.0181@telstr.UUCP> dlnghrst@telstr.UUCP (David Langhorst) writes: >...Alot of people over on c.s.amiga.audio are concerned with the fact that the >CIA A timer was taken out of the A3000. Most muzik software relies on the CIA >A for it's timing....they are mostly interested in how to cope w/o it, but I >was wondering why it got left out in the first place...why? The hardware is still there. However, the CIA A timer has *always* been reserved to the operating system. Under 1.x, it wasn't correctly allocated by the operating system, so it appeared to be free when it wasn't really. This was a bug, which is fixed in 2.x. To make matters worse, there was a lot of confusion in the early editions of the hardware reference manual over which timers were allocated for what. This was all sorted out a while back, but not before a number of music programs used the wrong hardware timer. -Dan Riley (riley@theory.tn.cornell.edu, cornell!batcomputer!riley) -Wilson Lab, Cornell University -- -Dan Riley (riley@theory.tn.cornell.edu, cornell!batcomputer!riley) -Wilson Lab, Cornell University