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Bochs VBE emulation fix

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@774 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-04-28 22:38:47 +00:00
parent 26aa7d72cc
commit 646be93b4c
1 changed files with 8 additions and 0 deletions
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8
hw/vga.c
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@ -597,6 +597,7 @@ static void vbe_ioport_write(void *opaque, uint32_t addr, uint32_t val)
s->sr[0x01] &= ~8; /* no double line */
} else {
shift_control = 2;
s->sr[4] |= 0x08; /* set chain 4 mode */
}
s->gr[0x05] = (s->gr[0x05] & ~0x60) | (shift_control << 5);
s->cr[0x09] &= ~0x9f; /* no double scan */
@ -1768,6 +1769,13 @@ int vga_initialize(DisplayState *ds, uint8_t *vga_ram_base,
register_ioport_write(0x1ce, 1, 2, vbe_ioport_write, s);
register_ioport_write(0x1cf, 1, 2, vbe_ioport_write, s);
/* old Bochs IO ports */
register_ioport_read(0xff80, 1, 2, vbe_ioport_read, s);
register_ioport_read(0xff81, 1, 2, vbe_ioport_read, s);
register_ioport_write(0xff80, 1, 2, vbe_ioport_write, s);
register_ioport_write(0xff81, 1, 2, vbe_ioport_write, s);
#endif
vga_io_memory = cpu_register_io_memory(0, vga_mem_read, vga_mem_write);