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   comp.sys.cbm      Discussion about Commodore micros      53,866 messages   

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   Message 53,764 of 53,866   
   Johann Klasek - swap last two domai to George   
   Re: Plus 4 rom error - is there any plac   
   22 Jun 24 20:47:33   
   
   From: johann+usenet@at.klasek.invalid   
      
   George  wrote:   
   > If anyone has a Plus/4 and has nothing better to do, it would be helpful if   
   > you could run the programs listed below and report the results.  The   
   > programs report the total number of ACIA interrupts which occur while   
   > transmitting 256 bytes of data continuously at 2400 baud.  They should be   
   > run with nothing plugged into the User Port - no modem or anything.   
   >   
   > My suspicion is that the single-byte transmit buffer of the Plus/4 results   
   > in back-to-back double interrupts being generated for each byte   
   > transmitted, which can cause problems at high speed.  If that's the case,   
   > the first program will report about 512 interrupts, and the second about   
   > 256.  But there may be no difference.  Anyway, I just need to know.   
   [..]   
      
   Did anyone catched up to this? Has it been solved.   
      
   Maybe I could give a try, if still needed.   
      
   Best,   
   JEEK   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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