| Title: | AMIGA NOTES |
| Notice: | Join us in the *NEW* conference - HYDRA::AMIGA_V2 |
| Moderator: | HYDRA::MOORE |
| Created: | Sat Apr 26 1986 |
| Last Modified: | Wed Feb 05 1992 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 5378 |
| Total number of notes: | 38326 |
What exactly does forbid() do
I understand that it disables multitasking..?
Does this imply that the harddisk.device etc.. also
no longer function.
The reason I ask is because I'm hoping to write some software
for an EPROM programmer, and I need accurate timings. etc..
I guess if it's so then I put the file in ram first.
-Pete-
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 4938.1 | ELWOOD::PETERS | Wed Jul 31 1991 22:36 | 7 | ||
Forbid() stops everything ! You should be ready to complete the
task before doing a forbid(). No user interaction and no devices of any
type. It even stops hardware interrupts.
Steve P.
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| 4938.2 | Does it? | FORTY2::CADWALLADER | Thu Aug 01 1991 07:33 | 10 | |
Are you sure that Forbid() stops interrupts? I thought that this is what Disable() & Enable() are for. Furthermore, when once writing a sprite-moving routine, I found that interrupts had to be disabled by clearing the relevent int register bits, although Forbid() had been called already, to enable the routine to function correctly. BTW - correct me if I'm wrong. | |||||
| 4938.3 | STAR::GUINEAU | but what was the question? | Thu Aug 01 1991 12:01 | 8 | |
I believe .-1 is correct. Forbid() will only disable task switching (which I guess means any task, so the file systems will not run, but I believe drivers can handle interrupts). Disable() stops all interrupts so even the drivers are affected. john | |||||
| 4938.4 | Thanks...But.. | WELSWS::FINNIS | Thu Aug 01 1991 20:05 | 15 | |
Thanks Guys,
I think that I must have had the disable() in the
back of my mind...No not literally..
Can anyone guess the next question..
Yup..
There was a note recently about examples of how to drive the
Parallel Port, but I can't find it. If anyone has any code that
may help I would appreciate it. Or a pointer to the note or the
author.
I've checked out the "C Manual" and "R.K.M" stuff from Fish
Disks.
-Pete-
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