8 Apr
2015
8 Apr
'15
6:48 p.m.
Kevin O'Connor wrote:
(Specifically, the "leal" instruction is not properly implemented.)
Unfortunately, there isn't much that can be done about this on the vga bios side.
Really? Impossible to save flags, use other opcodes, and restore flags?
lea isn't used in vgasrc/ besides in the trap that triggers the fault.
In src/romlayout.S lea is used in two places to bump esp before calls. If those code paths are used also by SeaVGABIOS then maybe they could be rewritten with simpler instructions?
//Peter