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From: Finn Thain <fthain@linux-m68k.org>
To: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: qemu-devel@nongnu.org, Laurent Vivier <laurent@vivier.eu>,
	qemu-ppc@nongnu.org, Greg Kurz <groug@kaod.org>,
	David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [RFC 10/10] hw/mos6522: Synchronize timer interrupt and timer counter
Date: Thu, 26 Aug 2021 16:43:27 +1000 (AEST)	[thread overview]
Message-ID: <f19e9c90-1248-e442-fd3a-1d4022945764@linux-m68k.org> (raw)
In-Reply-To: <8895ba94-2a50-8845-2744-e318fc08dd47@ilande.co.uk>


On Wed, 25 Aug 2021, Mark Cave-Ayland wrote:

> 
> Unfortunately the datasheet I was using for reference doesn't appear to 
> have the relevant detail here. Have you got a reference to the datasheet 
> you're using which shows what happens to the timers at the zero crossing 
> point?
> 

The datasheets which I normally refer to (Rockwell and Synertek) agree 
about this. Also, I established the sequence experimentally when I was 
writing the clocksource drivers for Linux/m68k.


  reply	other threads:[~2021-08-26  6:44 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 10:09 [RFC 00/10] hw/mos6522: VIA timer emulation fixes and improvements Finn Thain
2021-08-24 10:09 ` [RFC 09/10] hw/mos6522: Avoid using discrepant QEMU clock values Finn Thain
2021-08-24 10:28   ` Philippe Mathieu-Daudé
2021-08-29  1:23     ` Finn Thain
2021-08-25  8:44   ` Mark Cave-Ayland
2021-08-29  1:55     ` Finn Thain
2021-08-24 10:09 ` [RFC 06/10] hw/mos6522: Implement oneshot mode Finn Thain
2021-08-25  8:18   ` Mark Cave-Ayland
2021-08-29  1:20     ` Finn Thain
2021-08-24 10:09 ` [RFC 01/10] hw/mos6522: Remove get_load_time() methods and functions Finn Thain
2021-08-24 10:29   ` Philippe Mathieu-Daudé
2021-08-25  6:55   ` Mark Cave-Ayland
2021-08-28  1:00     ` Finn Thain
2021-08-24 10:09 ` [RFC 08/10] hw/mos6522: Call mos6522_update_irq() when appropriate Finn Thain
2021-08-24 10:22   ` Philippe Mathieu-Daudé
2021-08-25  8:26   ` Mark Cave-Ayland
2021-08-24 10:09 ` [RFC 07/10] hw/mos6522: Fix initial timer counter reload Finn Thain
2021-08-25  8:23   ` Mark Cave-Ayland
2021-08-28  0:46     ` Finn Thain
2021-08-24 10:09 ` [RFC 10/10] hw/mos6522: Synchronize timer interrupt and timer counter Finn Thain
2021-08-25  8:52   ` Mark Cave-Ayland
2021-08-26  6:43     ` Finn Thain [this message]
2021-08-24 10:09 ` [RFC 04/10] hw/mos6522: Rename timer callback functions Finn Thain
2021-08-24 10:28   ` Philippe Mathieu-Daudé
2021-08-25  7:11   ` Mark Cave-Ayland
2021-08-26  7:42     ` Philippe Mathieu-Daudé
2021-08-24 10:09 ` [RFC 02/10] hw/mos6522: Remove get_counter_value() methods and functions Finn Thain
2021-08-24 10:29   ` Philippe Mathieu-Daudé
2021-08-24 10:09 ` [RFC 05/10] hw/mos6522: Don't clear T1 interrupt flag on latch write Finn Thain
2021-08-25  7:20   ` Mark Cave-Ayland
2021-08-26  5:21     ` Finn Thain
2021-09-01 14:32       ` Laurent Vivier
2021-09-01 22:26         ` Finn Thain
2021-08-24 10:09 ` [RFC 03/10] hw/mos6522: Remove redundant mos6522_timer1_update() calls Finn Thain
2021-08-25  7:09   ` Mark Cave-Ayland
2021-08-24 10:34 ` [RFC 00/10] hw/mos6522: VIA timer emulation fixes and improvements Philippe Mathieu-Daudé
2021-08-28  1:22   ` Finn Thain
2021-08-31 21:14     ` Mark Cave-Ayland
2021-08-31 22:44       ` Finn Thain
2021-09-01  7:57         ` Mark Cave-Ayland
2021-09-01  8:06           ` Mark Cave-Ayland
2021-09-10 17:29             ` Mark Cave-Ayland
2021-09-11  0:08               ` Finn Thain
2021-09-01  2:20       ` Finn Thain
2021-08-25  3:11 ` David Gibson
2021-08-25  9:10 ` Mark Cave-Ayland
2021-08-28  4:11   ` Finn Thain

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