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Index: clext.c
===================================================================
RCS file: /sources/vgabios/vgabios/clext.c,v
retrieving revision 1.10
diff -u -w -r1.10 clext.c
--- clext.c 25 Mar 2006 10:19:15 -0000 1.10
+++ clext.c 14 May 2006 20:49:29 -0000
@@ -544,6 +544,13 @@
cirrus_set_video_mode_extended:
call cirrus_switch_mode
pop ax ;; mode
+ test al, #0x80
+ jnz cirrus_set_video_mode_extended_1
+ push ax
+ mov ax, #0xffff ; set to 0xff to keep win 2K happy
+ call cirrus_clear_vram
+ pop ax
+cirrus_set_video_mode_extended_1:
and al, #0x7f
push ds
@@ -1011,6 +1018,13 @@
jnz cirrus_vesa_02h_3
call cirrus_enable_16k_granularity
cirrus_vesa_02h_3:
+ test bx, #0x8000 ;; no clear
+ jnz cirrus_vesa_02h_4
+ push ax
+ xor ax,ax
+ call cirrus_clear_vram
+ pop ax
+cirrus_vesa_02h_4:
pop ax
push ds
#ifdef CIRRUS_VESA3_PMINFO
@@ -1479,6 +1493,38 @@
pop bx
ret
+cirrus_clear_vram:
+ pusha
+ push es
+ mov si, ax
+
+ call cirrus_enable_16k_granularity
+ call cirrus_extbios_85h
+ shl al, #2
+ mov bl, al
+ xor ah,ah
+cirrus_clear_vram_1:
+ mov al, #0x09
+ mov dx, #0x3ce
+ out dx, ax
+ push ax
+ mov cx, #0xa000
+ mov es, cx
+ xor di, di
+ mov ax, si
+ mov cx, #8192
+ cld
+ rep
+ stosw
+ pop ax
+ inc ah
+ cmp ah, bl
+ jne cirrus_clear_vram_1
+
+ pop es
+ popa
+ ret
+
cirrus_extbios_handlers:
;; 80h
dw cirrus_extbios_80h
|
