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Groups > comp.sys.apple2.programmer > #4638
| From | ol.sc@web.de (Oliver Schmidt) |
|---|---|
| Newsgroups | comp.sys.apple2.programmer |
| Subject | Re: A2osX : Now Preemptive .....and still lacking contributors! |
| Date | 2018-07-02 08:49 +0000 |
| Organization | albasani.net |
| Message-ID | <phcou3$3ci$1@news.albasani.net> (permalink) |
| References | (1 earlier) <aa7e6987-c7e3-4b2f-a758-8fc1d90fd7af@googlegroups.com> <5443c4c7-c99d-43d6-84fb-6d4807466968@googlegroups.com> <c10af0d1-e6b0-48df-a0a5-c545d57703d0@googlegroups.com> <e96901c6-8f9d-47a4-8045-ada55bdf04fd@googlegroups.com> <0b0f57cd-19dc-4154-ba93-fdfa1a3207f7@googlegroups.com> |
Hi, >> This is incorrect. When an IRQ occurs, the 6502 has an IRQ response pend= >ing, but the Z80 stays active until it voluntarily gives up control. It is= > probably for this reason that the SoftCard BIOS generally uses 6502 code t= >o do menial things like read the keyboard, because it gives the opportunity= > for the 6502 to service interrupts. I've done interrupt driven serial I/O from CP/M back then and I remember it in the same way (with 6502 code) - and I remember that the Microsoft documention was pretty clear and accurate regarding IRQ handling. Regards, Oliver
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A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remygibert63@gmail.com> - 2018-05-24 08:35 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! Jean-Michel Paris <paris.jean.michel@gmail.com> - 2018-05-24 13:29 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-05-26 03:19 -0700
A2osX : Now Preemptive .....and still lacking contributors! Jonathan Roseberry <jonathan.roseberry4@gmail.com> - 2018-05-25 17:25 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-05-25 23:55 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-06-09 10:09 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! Jean-Michel Paris <paris.jean.michel@gmail.com> - 2018-06-10 05:45 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! Antoine Vignau <antoine.vignau@laposte.net> - 2018-06-11 21:17 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-06-12 03:24 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-06-29 04:30 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! Antoine Vignau <antoine.vignau@laposte.net> - 2018-06-30 05:28 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-06-30 07:01 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! MG <*@guidero.us> - 2018-06-30 12:45 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-06-30 23:11 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! ol.sc@web.de (Oliver Schmidt) - 2018-07-02 08:49 +0000
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-07-02 06:33 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! MG <*@guidero.us> - 2018-07-02 22:30 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-07-03 10:39 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! barana <barana24@hotmail.com> - 2018-07-13 22:59 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-07-14 00:00 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! barana <barana24@hotmail.com> - 2018-07-14 00:50 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! remy gibert <remy.gibert@free.fr> - 2018-07-14 01:18 -0700
Re: A2osX : Now Preemptive .....and still lacking contributors! MG <*@guidero.us> - 2018-06-30 12:40 -0700
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