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Make the 80x60, 132x25, 132x43, 132x50, and 132x60 VESA text modes

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work when using a graphics chipset which identifies itself as
`VIA CLE266', used in some VIA EPIA boards.  Two values need to be
patched in the VESA mode information structure: the widths of the modes
mentioned above are encoded in a format which was unknown to the VESA
module (and to my copy of the VBE spec.) whereas the window memory
segment values seem to be just incorrect.

I tested this on a VIA EPIA-M9000 and -M10000.
This commit is contained in:
Robert Drehmel 2003-07-18 00:06:10 +00:00
parent e27d79bb28
commit fcaec66af7
1 changed files with 12 additions and 0 deletions
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12
sys/i386/isa/vesa.c
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@ -58,6 +58,8 @@ __FBSDID("$FreeBSD$");
#include <i386/isa/isa.h>
#endif
#define VESA_VIA_CLE266 "VIA CLE266\r\n"
#ifndef VESA_DEBUG
#define VESA_DEBUG 0
#endif
@ -607,6 +609,7 @@ vesa_bios_init(void)
struct vesa_mode vmode;
video_info_t *p;
u_char *vmbuf;
int is_via_cle266;
int modes;
int err;
int i;
@ -649,6 +652,8 @@ vesa_bios_init(void)
/* fix string ptrs */
vesa_oemstr = (char *)vesa_fix_ptr(vesa_adp_info->v_oemstr,
vmf.vmf_es, vmf.vmf_di, buf);
is_via_cle266 = strcmp(vesa_oemstr, VESA_VIA_CLE266) == 0;
if (vesa_adp_info->v_version >= 0x0200) {
vesa_venderstr =
(char *)vesa_fix_ptr(vesa_adp_info->v_venderstr,
@ -712,6 +717,13 @@ vesa_bios_init(void)
vmode.v_modeattr & V_MODEGRAPHICS ? "graphics" : "text",
vmode.v_width, vmode.v_height, vmode.v_bpp);
#endif
if (is_via_cle266) {
if ((vmode.v_width & 0xff00) >> 8 == vmode.v_height - 1) {
vmode.v_width &= 0xff;
vmode.v_waseg = 0xb8000 >> 4;
}
}
/* copy some fields */
bzero(&vesa_vmode[modes], sizeof(vesa_vmode[modes]));
vesa_vmode[modes].vi_mode = vesa_vmodetab[i];