[comp.sys.ibm.pc] Vertical Retrace on Paradise VGA?

pashler@cogsci.ucsd.EDU (Hal Pashler) (03/11/89)

Does anyone know what memory location to read to 
determine when vertical retrace is taking place, 
for the Paradise VGA+ card (in EGA or VGA mode)
running a NEC Multisync II monitor?  And/or how to
blank and unblank the screen while writing into
screen memory? Thanks!!

hal pashler
hpashler@ucsd.edu