INTL 3:770/1 3:770/3   
   REPLYADDR gh424NO584SPAM@cox.net   
   REPLYTO 3:770/3.0 UUCP   
   MSGID: <20211128-235127.284.0@George.ssl-us.astraweb.com> 345df7e0   
   REPLY: <20211128-214515.62.0@George.ssl-us.astraweb.com> 5e30a579   
   PID: SoupGate-Win32 v1.05   
   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.   
      
   irqtest1   
   --------   
      
   10 rem  irq test1 to count interrupts   
   20 cb = 819   
   30 for i = 0 to 161   
   40 read a   
   50 poke cb+i,a   
   60 next   
   70 sys cb   
   75 open 2,2,0,chr$(26)+chr$(7)   
   80 sys 940   
   85 close 2   
   90 sys 845   
   95 print peek(1009)*256 + peek(1008)   
   100 data 120,32,85,252,186,202,189,0   
   110 data 1,24,105,36,141,20,3,232   
   120 data 189,0,1,105,0,141,21,3   
   130 data 88,96,120,169,14,141,20,3   
   140 data 169,206,141,21,3,88,96,173   
   150 data 9,255,41,2,240,3,32,96   
   160 data 206,44,216,7,16,64,173,1   
   170 data 253,141,212,7,16,56,238,240   
   180 data 3,208,3,238,241,3,173,212   
   190 data 7,41,8,240,24,173,212,7   
   200 data 41,247,141,212,7,173,0,253   
   210 data 141,213,7,173,211,7,201,63   
   220 data 240,3,32,220,234,173,212,7   
   230 data 41,16,240,10,44,206,7,16   
   240 data 5,162,0,32,131,234,76,43   
   250 data 206,120,169,0,141,240,3,141   
   260 data 241,3,141,242,3,88,44,206   
   270 data 7,48,251,169,85,141,205,7   
   280 data 56,110,206,7,206,242,3,208   
   290 data 237,173,2,253,73,12,141,2   
   300 data 253,96   
      
   irqtest2   
   --------   
      
   10 rem  irq test2 to count interrupts   
   20 cb = 819   
   30 for i = 0 to 173   
   40 read a   
   50 poke cb+i,a   
   60 next   
   70 sys cb   
   75 open 2,2,0,chr$(26)+chr$(7)   
   80 sys 952   
   85 close 2   
   90 sys 845   
   95 print peek(1009)*256 + peek(1008)   
   100 data 120,32,85,252,186,202,189,0   
   110 data 1,24,105,36,141,20,3,232   
   120 data 189,0,1,105,0,141,21,3   
   130 data 88,96,120,169,14,141,20,3   
   140 data 169,206,141,21,3,88,96,173   
   150 data 9,255,41,2,240,3,32,96   
   160 data 206,44,216,7,16,76,173,1   
   170 data 253,141,212,7,16,68,238,240   
   180 data 3,208,3,238,241,3,173,212   
   190 data 7,41,8,240,24,173,212,7   
   200 data 41,247,141,212,7,173,0,253   
   210 data 141,213,7,173,211,7,201,63   
   220 data 240,3,32,220,234,173,212,7   
   230 data 41,16,240,22,44,206,7,16   
   240 data 17,172,2,253,152,73,12,141   
   250 data 2,253,162,0,32,131,234,140   
   260 data 2,253,76,43,206,120,169,0   
   270 data 141,240,3,141,241,3,141,242   
   280 data 3,88,44,206,7,48,251,169   
   290 data 85,141,205,7,56,110,206,7   
   300 data 206,242,3,208,237,173,2,253   
   310 data 73,12,141,2,253,96   
   --- SoupGate-Win32 v1.05   
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)   
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