[net.micro.pc] ATT 6300 bios bug revisited

jeffm@mmintl.UUCP (Jeffrey Miller) (08/20/85)

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I just tried doing an int 19 with debug again.  This time I renamed
config.sys to config.sav, and autoexec.bat to autoexec.sav.  This prevented
any loading of memory-resident drivers (for my ethernet card and ansi.sys)
and any memory-resident programs (vterm for serial communications).  This
time int 19 worked on my 6300!  I then restored the 2 .sav files, and int 19
worked again.  It seems to get hung up reloading over existing stuff.  When
I tried to do it again with the drivers and vterm already loaded it failed.
Perhaps the reboot with int 19 does not go far enough in initializing memory.
It certainly does not do the ROM-resident diagnostics.  I am running PC-DOS
3.1 by the way, with no problems and I have 640k on the motherboard.  Maybe
the discrepancy is in the difference in entry into the diagnostic routines?


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	*	Jeff Miller				*
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