marka@uoregon.UUCP (marka) (08/16/84)
I'm looking for information concerning system hardware/software
glitches on the IBM PCjr.
I have an editor (written in Lattice C v1.04)
that runs fine on the PC and XT (many 100s of hours of testing)
but blows up within the first page of input on the PCjr.
Memory size, allocated stack space, and position in core
of the run image seem to have no (obvious) relationship
to the problem.
Are there known difficulties with :
1 - rapid key input in conjunction with direct video
memory write (to either 0xb800 or 0x1c00)?
2 - touching 6845 registers directly.
3 - unintentional VGA resets
4 - bus errors
Please reply by mail
Randy Goodall
c/o
{hp-pcd,tektronix}!uoregon!marka