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Fix up sections variables are created in, major code cleanup, remove protection removal. Completed! :D

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This commit is contained in:
n-a-c-h
2005-01-03 16:03:39 +00:00
parent 0c0097b919
commit a7598101d8
19 changed files with 87 additions and 420 deletions
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104
zsnes/src/dos/vesa12.asm
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@@ -28,21 +28,11 @@ EXTSYM InitDrive,gotoroot,InitDir,fulladdtab
EXTSYM LFBpointer,noblocks,bytesperscanline,vesamode,VESAmodelist
NEWSYM Vesa12AsmStart
; add 0214h video mode
;NEWSYM granularity, dw 0
;NEWSYM granadd, dd 0
SECTION .bss
NEWSYM granularity, resw 1
NEWSYM granadd, resd 1
SECTION .text
NEWSYM VESA12EXITTODOS
@@ -66,32 +56,30 @@ NEWSYM VESA12EXITTODOS
mov byte[videotroub],1
jmp DosExit
SECTION .data
.exitfromvesa12 db 'Unable to Initialize VESA1.2 $'
.return db 10,13,'$'
SECTION .text
;*******************************************************
; Set up Vesa 2
;*******************************************************
NEWSYM InitVesa12
;-------------------------------------------------;
; First - allocate some bytes in DOS memory for ;
; communication with VBE ;
;-------------------------------------------------;
;-------------------------------------------------;
; First - allocate some bytes in DOS memory for ;
; communication with VBE ;
;-------------------------------------------------;
mov eax,0100h
mov ebx,512/16 ; 512 bytes
int 31h ; Function 31h,100h - Allocate
; DOS memory (512 bytes)
jnc .gotmem
mov edx,.nomemmessage
jmp VESA12EXITTODOS
.nomemmessage
db ': Unable to locate DOS memory.$'
.gotmem
mov fs,dx ; FS now points to the DOS
; buffer
mov eax,0100h
mov ebx,512/16 ; 512 bytes
int 31h ; Function 31h,100h - Allocate DOS memory (512 bytes)
jnc .gotmem
mov edx,.nomemmessage
jmp VESA12EXITTODOS
.gotmem
mov fs,dx ; FS now points to the DOS buffer
;--------------------------------------------------;
@@ -118,8 +106,6 @@ NEWSYM InitVesa12
jnc .int1ok
mov edx,.noint1message
jmp VESA12EXITTODOS
.noint1message
db ': Simulated real mode interrupt failed.$'
.int1ok ; Real mode int successful!!!
mov eax,[RMREGS.eax]
@@ -127,24 +113,19 @@ NEWSYM InitVesa12
jz .vbedetected
mov edx,.novbemessage
jmp VESA12EXITTODOS
.novbemessage
db ': VBE not detected!!$'
.vbedetected
cmp dword[fs:0000],'VESA'
jz .vesadetected ; Check for presence of vesa
mov edx,.novesamessage
jmp VESA12EXITTODOS
.novesamessage
db ': VESA not detected!$'
.vesadetected
cmp word[fs:0004],102h
jae .vesa12detected ; Check we've got VESA 1.2 or greater
mov edx,.novesa2message
jmp VESA12EXITTODOS
.novesa2message
db ': VESA 1.2 or greater required!$'
;-----------------------------------------------------;
@@ -162,8 +143,6 @@ NEWSYM InitVesa12
jnc .wegottheselector
mov edx, .oopsnoselector
jmp VESA12EXITTODOS
.oopsnoselector
db ': Failed to allocate vesa display selector!$'
.wegottheselector
@@ -187,8 +166,6 @@ NEWSYM InitVesa12
.outofmodelistspace
mov edx,.outofmodelistspacemessage
jmp VESA12EXITTODOS
.outofmodelistspacemessage
db ': Out of VESA mode list space!$'
;----------------------------------------------;
; OK - Scan the mode list to find a matching ;
@@ -208,9 +185,6 @@ NEWSYM InitVesa12
mov edx,.endoflist
jmp VESA12EXITTODOS
.endoflist db ': VESA 1.2 mode does not work on your video card/driver.$'
.whichwin db 0
.notendoflist
mov edi, RMREGS
@@ -230,8 +204,6 @@ NEWSYM InitVesa12
jnc .modecheckok
mov edx,.modecheckfail
jmp VESA12EXITTODOS
.modecheckfail
db ': Real mode interrupt failure while checking vesa mode$'
.modecheckok
add ebp,2
@@ -492,11 +464,6 @@ NEWSYM InitVesa12
div bx
mov [granadd],ax
;vesa2_rtrcl dw 0 ; red transparency clear (bit+4)
;vesa2_rtrcla dw 0 ; red transparency (AND) clear (not(bit+4))
;vesa2_rfull dw 0 ; red max (or (bit-1)*1Fh)
call genfulladdtab
xor eax,eax
@@ -510,7 +477,6 @@ NEWSYM InitVesa12
jz .modesetok
mov edx,.unableset
jmp VESA12EXITTODOS ; Failure!!!
.unableset db 'Unable to initialize video mode.$'
.modesetok
;******************************* EXTRA BIT ****************************
@@ -534,34 +500,24 @@ NEWSYM InitVesa12
jz .correctwidth
mov edx, .unablescan
jmp VESA12EXITTODOS ; Failure!!!
.unablescan db 'Unable to set scan line length.$'
.correctwidth
ret
;RMREGS
;.edi dd 0
;.esi dd 0
;.ebp dd 0
;.esp dd 0
;.ebx dd 0
;.edx dd 0
;.ecx dd 0
;.eax dd 0
;.flags dw 0
;.es dw 0
;.ds dw 0
;.fs dw 0
;.gs dw 0
;.ip dw 0
;.cs dw 0
;.sp dw 0
;.ss dw 0
;.spare times 20 dd 0
SECTION .data
.nomemmessage db ': Unable to locate DOS memory.$'
.noint1message db ': Simulated real mode interrupt failed.$'
.oopsnoselector db ': Failed to allocate vesa display selector!$'
.novesa2message db ': VESA 1.2 or greater required!$'
.novbemessage db ': VBE not detected!!$'
.novesamessage db ': VESA not detected!$'
.outofmodelistspacemessage db ': Out of VESA mode list space!$'
.endoflist db ': VESA 1.2 mode does not work on your video card/driver.$'
.whichwin db 0
.modecheckfail db ': Real mode interrupt failure while checking vesa mode$'
.unableset db 'Unable to initialize video mode.$'
.unablescan db 'Unable to set scan line length.$'
SECTION .bss
RMREGS
@@ -583,5 +539,3 @@ RMREGS
.sp resw 1
.ss resw 1
.spare times 20 resd 1
NEWSYM Vesa12AsmEnd