========== IMPDSC.FIX ========== A Fix for the Disconnect Routine in IMP 2.44 Larry Davis of Glendale LITTERA seems to have found a solution to what he rightly calls an "irritating quirk" of IMP - a reluctance to disconnect when the remote is sending data, or worse, after the remote disconnects and IMP starts reading line noise as transmitted data. IMP users have had to get used to switching their modems off to disconnect. Here is Larry's proposed fix: in the IMP overlay three are four instructions in the GOODBYE routine that delay the disconnect routine. mvi b,'S'-40h ; send a ^S to stop the remote call j$sndchr ; this is where Larry thinks it hangs mvi b,1 call j$timer He believes that deleting or commenting out these instructions will permit instant disconnect, no matter what the modem is "receiving." For those who would rather do a quick patch than a reassembly, here's how I did it. The code breaks down to 06,13,CD,nn,nn,06,01,CD,nn,nn A search for 06,13,CD finds this pattern twice, once for a disconnect by ^N, and again for DSC. I found the first instance starting at the last byte in sector 2 (for me, anyway, 01FFh) and the second time in sector 89 - I found it at 2D52. Zeroing out the ten bytes in both instances allows you to test Larry's theory with a minimum of hassle. Make note of the actual bytes shown here as nn in case you run into trouble and want to restore the byte strings. (In my version of IMP the bytes were 8C,01 and 92,01, or addresses 018Ch for J$SNDCHR and 0192h for J$TIMER. Fred Haines Glendale LITTERA 818-956-6164 Abel Iwaz, sysop