IOC Timer 1

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#362

From: Professor Coypu
Date: Wed, 11 Nov 1992 10:41

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Hi there techies!

 Does anyone know how to access the IOC timer 1 in a `legal' way ? 

 I have looked in the PRM's and failed to find anything useful, except the
 hardware address, which seems to me to be a non-portable way of accessing
 it.  If this is the only way,  could someone tell me how to set the timer 
 going? I have tried the ways *I* think are obvious and failed (writing to
 the latch and then the go location). 
 
 Any pointers would be greatly appreciated...

 The  reason I need this  is because I wish to generate a 1200 baud signal 
 to drive  an amateur  packet  radio modem.  This signal is HDLC based and 
 does not use stop bits.  The RS423 chip appears to  force stop bits  into 
 the signal  and the only way round this I  can think of (without  delving
 deeply  into  hardware) is to  generate the serial  output  myself  using 
 interrupts.

 All sane suggestions welcome,

Alun.

P.S.  Anyone knowing how to get the serial chip to generate output without 
      stop bits will also be welcomed with open arms...
-- 
+-------------------------------------------------------------------+
| Alun Jones, Computer Science Dept. | Email : auj@uk.ac.aber       |
| U.W. Aberystwyth, Wales            | GW1URF (Packet coming soon!) |
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Message-ID: <1992Nov11.104105.3383@aber.ac.uk>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!gdt!aber!auj

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!gdt!aber!auj
From: auj@aber.ac.uk (Professor Coypu)
Newsgroups: comp.sys.acorn.tech
Subject: IOC Timer 1
Message-ID: <1992Nov11.104105.3383@aber.ac.uk>
Date: 11 Nov 92 10:41:05 GMT
Sender: auj@aber.ac.uk (Professor Coypu)
Organization: Prifysgol Cymru (University of Wales) Aberystwyth
Lines: 31