correction: vga240.c needs to consider vtotal constant is total - 2, and vdisplay end constant starts out as display end, but is subtracted by 1 before writing, and when reading display end from CRTC, needs to add 1.
correction: vga240.c needs to consider vtotal constant is total - 2, and
vdisplay end constant starts out as display end, but is subtracted by 1
before writing, and when reading display end from CRTC, needs to add 1.

joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib,joncampbell123/doslib