From: Nick Axel (njaxel_at_netscape.net)
Date: 2004-04-29 20:23:18
Hello Nick,
thanks for replying. You're right, Tpr is not important. My routines
wouldn't work and I was looking for timing problems and that's how I
came across Tpr and started wondering. They work now, problem solved.
Best wishes,
Nick
ncoplin@orbeng.com wrote:
> Hi Nick,
>
> I have checked the various sources I have about the IEC bus, but your
> are right in that none show the Tpr signal.
>
> In 64HDD's code I don't have a Tpr, and it still seems to work...
>
> - Nick
>
>
> -----Original Message-----
> From: owner-cbm-hackers@cling.gu.se
> [mailto:owner-cbm-hackers@cling.gu.se]On Behalf Of njaxel@netscape.net
> Sent: Monday, 26 April 2004 1:54 PM
> To: cbm-hackers@cling.gu.se
> Subject: Que: Tpr on serial bus diagram
>
>
> Hi,
>
> while experimenting with the serial bus and having a look at the C64
> PRG and a serial bus doc that came along with VICE, I noticed Tpr,
> mentioned in both texts but nowhere to be seen on the timing
> diagrams. According to the tables in these docs, it stands for
> BYTE-ACKNOWLEDGE, but I can't see it fitting anywhere. It's supposed
> to be important if an external device is a talker (min 20us, typ
> 30us).
>
> Any ideas what this Tpr is and where should it be on the C64 PRG diagram?
>
> Thank you all in advance.
>
> Best wishes,
>
> Nick
>
>
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