john@moncol.UUCP (John Ruschmeyer) (07/17/85)
I have recently gotten into using MS-DOS and bios interrupt calls and noticed the following peculiarity on the AT&T PC6300: From debug, I assemble the one-line program int 19 and execute it. This should invoke the bios interrupt to reboot the system. Running the program, it does begin a reboot, but the system then hangs immediately after printing out the compatability software and MS-DOS version messages. The reset switch must then be pressed to restart the system. The system also hangs at the same point when executing an int 18 (transfer to ROM BASIC on an IBM). If it matters, the system is an AT&T 6300 with 640k memory, one floppy, and a 10-meg hard disk. Oddly enough, both interrupts run correctly on my 256k, 2-drive Tandy 1000. Both machines have a compatability bios by Phoenix Associates. Am I doing something wrong or is this a bug in the bios? -- Name: John Ruschmeyer US Mail: Monmouth College, W. Long Branch, NJ 07764 Phone: (201) 222-6600 x366 UUCP: ...!vax135!petsd!moncol!john ...!princeton!moncol!john ...!pesnta!moncol!john Ingredients: Carbonated water, sugar, caramel color, phosphoric acid, natural flavorings, caffeine
jeffm@mmintl.UUCP (Jeffrey Miller) (07/18/85)
> I have recently gotten into using MS-DOS and bios interrupt calls and > noticed the following peculiarity on the AT&T PC6300: > > From debug, I assemble the one-line program > > int 19 > > and execute it. This should invoke the bios interrupt to reboot the system. > Running the program, it does begin a reboot, but the system then hangs... John, In reference to your int 19 bios bug, there is more than one version of the ATT6300 motherboard and bios. Do you know which you have &/or how old is your 6300. I use my 6300 for development and have not found any incom- patibilities (yet). I'm interested in resolving this problem. Jeff ************************************************* * Jeff Miller * * Multimate International Corp. * * 52 Oakland Avenue * * East Hartford, CT 06108-9911 * * (203) 522-2116 x257 * * UUCP: * * ...!seismo!utah-cs!utah-gr!pwa-b!mmintl!jeffm * ************************************************* *