bds@mtgzz.UUCP (b.d.szablak) (10/18/85)
Question for ST developers: Does the ST allow you to set the interrupt vectors, and can the ST generate timed or periodic interrupts? Any other comments about ST internals would be welcomed as well. Bruce Szablak ihnp4!mtgzz!bds
djb@riccb.UUCP (Dave J. Burris ) (10/21/85)
> Does the ST allow you to set the interrupt vectors, and can the ST > generate timed or periodic interrupts? > Yes and yes. There is one programmable timer reserved for applications programs. There is a BIOS routine that allows you to redefine vectors. -- Dave Burris ..!ihnp4!ihopa!riccb!djb Rockwell Switching Systems, Downers Grove, Il.
Felton.PA@XEROX.ARPA (10/21/85)
I don't have the technical information to answer the question of interrupt vectors with specifics. But, I do know that the ST can change the color registers scan line by scan line just as the Amiga and old Atari 800 could. This is usually done with "periodic interrupts". I am trying to program the ST in Hippo C with grossly inadequate documentation about the machine. Can anyone tell me how to read the joystick ports. Also, if any one knows, how do you use the BitBlt capabilities. John
davecl@shark.UUCP (Dave Clemans) (10/24/85)
You can definitely play tricks to get large numbers of colors visible simultaneously. Neochrome 0.5 (a very good color paint program available free from Atari to any ST purchaser) shows around 200 colors at once in its color selection area. dgc