8251 USART

Discussions about Sinclair ZX80 and ZX81 Hardware
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butchi
Posts: 23
Joined: Wed Jun 12, 2019 4:12 am

8251 USART

Post by butchi » Tue Jul 30, 2019 2:41 am

Hi,
This is the backbone of the Byte Back Modem, activated by logic gates to test individual bits of an entire byte.
b
* docs attached *
Attachments
byteback.pdf
(4.37 MiB) Downloaded 39 times

jdfan1000
Posts: 18
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Location: Buffalo, NY
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Re: 8251 USART

Post by jdfan1000 » Tue Jul 30, 2019 7:32 pm

Hi!

Do you know where this came from originally?

Thanks!
My archive.org collection, containing many Timex/Sinclair related publications.

TimexSinclair.com, my website about Sinclair computers in the US.

butchi
Posts: 23
Joined: Wed Jun 12, 2019 4:12 am

Re: 8251 USART

Post by butchi » Wed Jul 31, 2019 4:59 am

jdfan1000 wrote:
Tue Jul 30, 2019 7:32 pm
Hi!

Do you know where this came from originally?

Thanks!
jd,

Designed by David Leech from Leesville, SC
He says the 8251 USART is good for 9600 bps.
b

jdfan1000
Posts: 18
Joined: Tue Aug 02, 2016 8:06 pm
Location: Buffalo, NY
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Re: 8251 USART

Post by jdfan1000 » Wed Aug 28, 2019 5:53 pm

Thanks! Not a few days later, I received a copy of TS Horizons that had the article in it. I'm not sure if I scanned it but I'll try to do that and post it to archive.org tonight.
My archive.org collection, containing many Timex/Sinclair related publications.

TimexSinclair.com, my website about Sinclair computers in the US.

jdfan1000
Posts: 18
Joined: Tue Aug 02, 2016 8:06 pm
Location: Buffalo, NY
Contact:

Re: 8251 USART

Post by jdfan1000 » Fri Aug 30, 2019 6:49 pm

The issue of T-S Horizons containing the original article is now on archive.org, here:
https://archive.org/stream/TSHorizons/T ... 1#mode/2up

It starts on page 12.
My archive.org collection, containing many Timex/Sinclair related publications.

TimexSinclair.com, my website about Sinclair computers in the US.

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XavSnap
Posts: 700
Joined: Sat May 10, 2008 4:23 pm

Re: 8251 USART

Post by XavSnap » Sat Aug 31, 2019 4:12 am

Hi,
Try to load the PDF file…

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