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- Date: Friday, 16 November 1984
- From: Hugh Redelmeier
- To: net.micro.cpm
- Re: Need Kaypro technical help
-
- I have done serial I/O on the Kaypro II (pre-1984 version) using
- interrupts.
-
- - Only the first 16K of address space is bank switched.
-
- - Remember to put your interrupt routine and the vector above 16k.
-
- - You must use the interrupt mode that allows you to
- specify that the interrupt vector is above 16k.
-
- - If you are using PluPerfect CPM2.2E, it is already using
- interrupts with the SIO (using the SIO channel to the keyboard
- as a timer to turn off the disk after a few seconds of inactivity!).
- It would be tricky to share the SIO interrupts with CP/M 2.2E.
-
- - Be careful to use very little stack in your interrupt routine:
- the interrupted routine may not have left you much. Best to
- switch to a private stack immediately on entry to your
- interrupt routine.
-
-
-
- Date: Saturday, 24 November 1984
- From: Mike Rubenstein
- To: net.micro.cpm
- Re: Need Kaypro technical help
-
- On the Kaypro 10 the first 32K is bank switched.
- --
- Mike Rubenstein, OACB, UT Medical Branch, Galveston TX 77550
-