WebSVN – Kolibri OS – Blame – /kernel/branches/gfx_kernel/video/vesa12.inc

Rev	Author	Line No.	Line
129	mikedld	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; VESA12.INC ;;
		4	;; ;;
		5	;; Vesa 1.2 functions for MenuetOS ;;
		6	;; ;;
		7	;; Copyright 2002 Ville Turjanmaa ;;
		8	;; ;;
		9	;; quickcode@mail.ru - bankswitch for S3 cards ;;
		10	;; ;;
		11	;; See file COPYING for details ;;
		12	;; ;;
		13	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		14
		15
		16	; A complete video driver should include the following types of function
		17	;
		18	; Putpixel
		19	; Getpixel
		20	;
		21	; Drawimage
		22	; Drawbar
		23	;
		24	; Drawbackground
		25	;
		26	;
		27	; Modifying the set_bank -function is mostly enough
		28	; for different Vesa 1.2 setups.
		29
		30	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
		31	; set_bank for Trident videocards, work on Trident 9440
		32	; modified by Mario79
		33	;set_bank:
		34	;cli
384	mikedld	35	;cmp al,[BANK_RW]
129	mikedld	36	;je retsb
384	mikedld	37	;mov [BANK_RW],al
129	mikedld	38	;push dx
		39	;mov dx,3D8h
		40	;out dx,al
		41	;pop dx
		42	;retsb:
		43	;sti
		44	;ret
		45
		46
		47	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
		48	; set_bank for S3 videocards, work on S3 ViRGE PCI (325)
384	mikedld	49	; modified by kmeaw
		50	set_bank:
129	mikedld	51	pushfd
384	mikedld	52	cli
		53	cmp al,[BANK_RW]
		54	je retsb
		55	mov [BANK_RW],al
		56	push ax
		57	push dx
		58	push cx
		59	mov cl, al
		60	mov dx, 0x3D4
		61	mov al, 0x38
129	mikedld	62	out dx, al ;CR38 Register Lock 1 ;Note: Traditionally 48h is used to
		63	;unlock and 00h to lock
384	mikedld	64	inc dx
		65	mov al, 0x48
129	mikedld	66	out dx, al ;3d5 -?
384	mikedld	67	dec dx
		68	mov al, 0x31
129	mikedld	69	out dx, al ;CR31 Memory Configuration Register
		70	;0 Enable Base Address Offset (CPUA BASE). Enables bank operation if set, ;disables if clear.
		71	;4-5 Bit 16-17 of the Display Start Address. For the 801/5,928 see index 51h,
		72	;for the 864/964 see index 69h.
		73
384	mikedld	74	inc dx
		75	in al, dx
		76	dec dx
		77	mov ah, al
		78	mov al, 0x31
		79	out dx, ax
		80	mov al, ah
		81	or al, 9
		82	inc dx
		83	out dx, al
		84	dec dx
		85	mov al, 0x35
129	mikedld	86	out dx, al ;CR35 CRT Register Lock
384	mikedld	87	inc dx
		88	in al, dx
		89	dec dx
		90	and al, 0xF0
		91	mov ch, cl
		92	and ch, 0x0F
		93	or ch, al
		94	mov al, 0x35
		95	out dx, al
		96	inc dx
		97	mov al, ch
		98	out dx, ax
		99	dec dx
129	mikedld	100	mov al, 0x51 ;Extended System Control 2 Register
384	mikedld	101	out dx, al
		102	inc dx
		103	in al, dx
		104	dec dx
		105	and al, 0xF3
		106	shr cl, 2
		107	and cl, 0x0C
		108	or cl, al
		109	mov al, 0x51
		110	out dx, al
		111	inc dx
		112	mov al, cl
		113	out dx, al
		114	dec dx
		115	mov al, 0x38
		116	out dx, al
		117	inc dx
		118	xor al, al
		119	out dx, al
		120	dec dx
		121	pop cx
		122	pop dx
		123	pop ax
		124	retsb:
129	mikedld	125	popfd
		126	ret
		127
		128	;Set bank function for Intel 810/815 chipsets
		129	; ***Modified by Protopopius, Russia.***
		130	; ******* http://menuetos.hut.ru ************
		131	; ************************************************
		132	;
		133	;set_bank:
		134	;cli
384	mikedld	135	;cmp al,[BANK_RW]
129	mikedld	136	;je retsb
384	mikedld	137	;mov [BANK_RW],al
129	mikedld	138	;push ax
		139	;push dx
		140	;mov dx,3CEh
		141	;mov ah,al ; Save value for later use
		142	;mov al,10h ; Index GR10 (Address Mapping)
		143	;out dx,al ; Select GR10
		144	;inc dl
		145	;mov al,3 ; Set bits 0 and 1 (Enable linear page mapping)
		146	;out dx,al ; Write value
		147	;dec dl
		148	;mov al,11h ; Index GR11 (Page Selector)
		149	;out dx,al ; Select GR11
		150	;inc dl
		151	;mov al,ah ; Write address
		152	;out dx,al ; Write the value
		153	;pop dx
		154	;pop ax
		155	;retsb:
		156	;sti
		157	;ret
		158
		159	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!}
		160
		161	;set_bank:
		162	; cli
384	mikedld	163	; cmp al,[BANK_RW]
129	mikedld	164	; je retsb
384	mikedld	165	; mov [BANK_RW],al
129	mikedld	166	; push ax
		167	; push dx
		168	; mov ah,al
		169	; mov dx,0x03D4
		170	; mov al,0x39
		171	; out dx,al
		172	; inc dl
		173	; mov al,0xA5
		174	; out dx,al
		175	; dec dl
		176	; mov al,6Ah
		177	; out dx,al
		178	; inc dl
		179	; mov al,ah
		180	; out dx,al
		181	; dec dl
		182	; mov al,0x39
		183	; out dx,al
		184	; inc dl
		185	; mov al,0x5A
		186	; out dx,al
		187	; dec dl
		188	; pop dx
		189	; pop ax
		190	;
		191	; retsb:
		192	; ret
		193
		194
		195	vesa12_drawbackground:
		196
		197	call [disable_mouse]
		198
		199	push eax
		200	push ebx
		201	push ecx
		202	push edx
		203
		204	xor edx,edx
		205	mov eax,dword[WinMapAddress-8]
		206	mov ebx,dword[WinMapAddress-4]
		207	mul ebx
		208	mov ebx,3
		209	mul ebx
		210	mov [imax],eax
		211	mov eax,[draw_data+32+RECT.left]
		212	mov ebx,[draw_data+32+RECT.top]
		213	mov edi,0 ;no force
		214
		215	v12dp3:
		216
		217	push eax
		218	push ebx
384	mikedld	219	mov esi,IMG_BACKGROUND
129	mikedld	220
		221	cmp [WinMapAddress-12],dword 1 ; tiled background
		222	jne no_vesa12_tiled_bgr
		223
		224	push edx
		225
		226	xor edx,edx
		227	mov ecx,[WinMapAddress-8]
		228	div ecx
		229	mov eax,edx
		230
		231	push eax
		232	mov eax,ebx
		233	xor edx,edx
		234	mov ecx,[WinMapAddress-4]
		235	div ecx
		236	mov ebx,edx
		237	pop eax
		238
		239	pop edx
		240
		241	no_vesa12_tiled_bgr:
		242
		243	cmp [WinMapAddress-12],dword 2 ; stretched background
		244	jne no_vesa12_stretched_bgr
		245
		246	push edx
		247
		248	imul eax,dword [WinMapAddress-8]
		249	xor edx,edx
384	mikedld	250	mov ecx,[ScreenWidth]
129	mikedld	251	inc ecx
		252	div ecx
		253
		254	push eax
		255	mov eax,ebx
		256	imul eax,dword [WinMapAddress-4]
		257	xor edx,edx
384	mikedld	258	mov ecx,[ScreenHeight]
129	mikedld	259	inc ecx
		260	div ecx
		261	mov ebx,eax
		262	pop eax
		263
		264	pop edx
		265
		266	no_vesa12_stretched_bgr:
		267
		268
		269	push eax
		270	mov eax,ebx
		271	xor edx,edx
		272	mov ebx,[WinMapAddress-8]
		273	add ebx,[WinMapAddress-8]
		274	add ebx,[WinMapAddress-8]
		275	mul ebx
		276	mov esi,eax
		277	pop eax
		278	add esi,eax
		279	add esi,eax
		280	add esi,eax
384	mikedld	281	add esi,IMG_BACKGROUND
129	mikedld	282	pop ebx
		283	pop eax
		284
		285	v12di4:
		286
		287	mov ecx,[esi]
		288	pusha
		289	mov esi,eax
		290	mov edi,ebx
384	mikedld	291	mov eax,[ScreenWidth]
129	mikedld	292	add eax,1
		293	mul ebx
		294	add eax,esi
		295	add eax,WinMapAddress
		296	cmp [eax],byte 1
		297	jnz v12nbgp
384	mikedld	298	mov eax,[BytesPerScanLine]
129	mikedld	299	mov ebx,edi
		300	mul ebx
		301	add eax,esi
		302	add eax,esi
		303	add eax,esi
384	mikedld	304	cmp [ScreenBPP],byte 24
129	mikedld	305	jz v12bgl3
		306	add eax,esi
		307
		308	v12bgl3:
		309
		310	push ebx
		311	push eax
		312
384	mikedld	313	sub eax,[LFBAddress]
129	mikedld	314
		315	shr eax,16
		316	call set_bank
		317	pop eax
		318	and eax,65535
384	mikedld	319	add eax,VGABasePtr
129	mikedld	320	pop ebx
		321
		322	mov [eax],cx
		323	add eax,2
		324	shr ecx,16
		325	mov [eax],cl
		326	sti
		327
		328	v12nbgp:
		329
		330	popa
		331	add esi,3
		332	inc eax
		333	cmp eax,[draw_data+32+RECT.right]
		334	jg v12nodp31
		335	jmp v12dp3
		336
		337	v12nodp31:
		338
		339	mov eax,[draw_data+32+RECT.left]
		340	inc ebx
		341	cmp ebx,[draw_data+32+RECT.bottom]
		342	jg v12dp4
		343	jmp v12dp3
		344
		345	v12dp4:
		346
		347	pop edx
		348	pop ecx
		349	pop ebx
		350	pop eax
		351	ret
		352
		353
		354	vesa12_drawbar:
		355
		356	call [disable_mouse]
		357
		358	;; mov [novesachecksum],dword 0
		359	sub edx,ebx
		360	sub ecx,eax
		361	push esi
		362	push edi
		363	push eax
		364	push ebx
		365	push ecx
		366	push edx
384	mikedld	367	mov ecx,[TASK_BASE]
129	mikedld	368	add eax,[ecx-twdw+WDATA.box.left]
		369	add ebx,[ecx-twdw+WDATA.box.top]
		370	push eax
		371	mov eax,ebx ; y
384	mikedld	372	mov ebx,[BytesPerScanLine]
129	mikedld	373	mul ebx
		374	pop ecx
		375	add eax,ecx ; x
		376	add eax,ecx
		377	add eax,ecx
384	mikedld	378	cmp [ScreenBPP],byte 24 ; 24 or 32 bpp ? - x start
129	mikedld	379	jz dbpi2412
		380	add eax,ecx
		381
		382	dbpi2412:
		383
384	mikedld	384	add eax,[LFBAddress]
129	mikedld	385	mov edi,eax
		386
		387	; x size
		388
		389	mov eax,[esp+4] ; [esp+6]
		390	mov ecx,eax
		391	add ecx,eax
		392	add ecx,eax
384	mikedld	393	cmp [ScreenBPP],byte 24 ; 24 or 32 bpp ? - x size
129	mikedld	394	jz dbpi24312
		395	add ecx,eax
		396
		397	dbpi24312:
		398
		399	mov ebx,[esp+0]
		400
		401	; check limits ?
		402
		403	push eax
		404	push ecx
384	mikedld	405	mov eax,[TASK_BASE]
		406	mov ecx,[eax+draw_data-CURRENT_TASK+RECT.left]
129	mikedld	407	cmp ecx,0
		408	jnz dbcblimitlset12
384	mikedld	409	mov ecx,[eax+draw_data-CURRENT_TASK+RECT.top]
129	mikedld	410	cmp ecx,0
		411	jnz dbcblimitlset12
384	mikedld	412	mov ecx,[eax+draw_data-CURRENT_TASK+RECT.right]
		413	cmp ecx,[ScreenWidth]
129	mikedld	414	jnz dbcblimitlset12
384	mikedld	415	mov ecx,[eax+draw_data-CURRENT_TASK+RECT.bottom]
		416	cmp ecx,[ScreenHeight]
129	mikedld	417	jnz dbcblimitlset12
		418	pop ecx
		419	pop eax
		420	push dword 0
		421	jmp dbcblimitlno12
		422
		423	dbcblimitlset12:
		424
		425	pop ecx
		426	pop eax
		427	push dword 1
		428
		429	dbcblimitlno12:
		430
384	mikedld	431	cmp [ScreenBPP],byte 24 ; 24 or 32 bpp ?
129	mikedld	432	jz dbpi24bit12
		433	jmp dbpi32bit12
		434
		435
		436	; DRAWBAR 24 BBP
		437
		438
		439	dbpi24bit12:
		440
		441	push eax
		442	push ebx
		443	push edx
		444	mov eax,ecx
		445	mov ebx,3
		446	div ebx
		447	mov ecx,eax
		448	pop edx
		449	pop ebx
		450	pop eax
		451	cld
		452
		453	dbnewpi12:
		454
		455	push ebx
		456	push edi
		457	push ecx
		458
		459	xor edx,edx
		460	mov eax,edi
384	mikedld	461	sub eax,[LFBAddress]
129	mikedld	462	mov ebx,3
		463	div ebx
		464	add eax,WinMapAddress
384	mikedld	465	mov ebx,[CURRENT_TASK]
129	mikedld	466	cld
		467
		468	dbnp2412:
		469
		470	mov dl,[eax]
		471	push eax
		472	push ecx
		473	cmp dl,bl
		474	jnz dbimp24no12
		475	cmp [esp+5*4],dword 0
		476	jz dbimp24yes12
		477	; call dbcplimit
		478	; jnz dbimp24no12
		479
		480	dbimp24yes12:
		481
		482	push edi
		483	mov eax,edi
384	mikedld	484	sub eax,[LFBAddress]
129	mikedld	485	shr eax,16
		486	call set_bank
		487	and edi,0xffff
384	mikedld	488	add edi,VGABasePtr
129	mikedld	489	mov eax,[esp+8+3*4+16+4+4]
		490	stosw
		491	shr eax,16
		492	stosb
		493	sti
		494	pop edi
		495	add edi,3
		496	pop ecx
		497	pop eax
		498	inc eax
		499	loop dbnp2412
		500	jmp dbnp24d12
		501
		502	dbimp24no12:
		503
		504	pop ecx
		505	pop eax
		506	cld
		507	add edi,3
		508	inc eax
		509	loop dbnp2412
		510
		511	dbnp24d12:
		512
		513	mov eax,[esp+3*4+16+4]
		514	test eax,0x80000000
		515	jz nodbgl2412
		516	cmp al,0
		517	jz nodbgl2412
		518	dec eax
		519	mov [esp+3*4+16+4],eax
		520
		521	nodbgl2412:
		522
		523	pop ecx
		524	pop edi
		525	pop ebx
384	mikedld	526	add edi,[BytesPerScanLine]
129	mikedld	527	dec ebx
		528	jz dbnonewpi12
		529	jmp dbnewpi12
		530
		531	dbnonewpi12:
		532
		533	add esp,7*4
		534
		535	ret
		536
		537
		538	; DRAWBAR 32 BBP
		539
		540
		541	dbpi32bit12:
		542
		543	cld
		544	shr ecx,2
		545
		546	dbnewpi3212:
		547
		548	push ebx
		549	push edi
		550	push ecx
		551
		552	mov eax,edi
384	mikedld	553	sub eax,[LFBAddress]
129	mikedld	554	shr eax,2
		555	add eax,WinMapAddress
384	mikedld	556	mov ebx,[CURRENT_TASK]
129	mikedld	557	cld
		558
		559	dbnp3212:
		560
		561	mov dl,[eax]
		562	push eax
		563	push ecx
		564	cmp dl,bl
		565	jnz dbimp32no12
		566	cmp [esp+5*4],dword 0
		567	jz dbimp32yes12
		568	; call dbcplimit
		569	; jnz dbimp32no12
		570
		571	dbimp32yes12:
		572
		573	push edi
		574	mov eax,edi
384	mikedld	575	sub eax,[LFBAddress]
129	mikedld	576	shr eax,16
		577	call set_bank
		578	and edi,0xffff
384	mikedld	579	add edi,VGABasePtr
129	mikedld	580	mov eax,[esp+8+3*4+16+4+4]
		581	stosw
		582	shr eax,16
		583	stosb
		584	sti
		585	pop edi
		586	add edi,4
		587	inc ebp
		588	pop ecx
		589	pop eax
		590	inc eax
		591	loop dbnp3212
		592	jmp dbnp32d12
		593
		594	dbimp32no12:
		595
		596	pop ecx
		597	pop eax
		598	inc eax
		599	add edi,4
		600	inc ebp
		601	loop dbnp3212
		602
		603	dbnp32d12:
		604
		605	mov eax,[esp+12+16+4]
		606	test eax,0x80000000
		607	jz nodbgl3212
		608	cmp al,0
		609	jz nodbgl3212
		610	dec eax
		611	mov [esp+12+16+4],eax
		612
		613	nodbgl3212:
		614
		615	pop ecx
		616	pop edi
		617	pop ebx
384	mikedld	618	add edi,[BytesPerScanLine]
129	mikedld	619	dec ebx
		620	jz nodbnewpi3212
		621	jmp dbnewpi3212
		622
		623	nodbnewpi3212:
		624
		625	add esp,7*4
		626	ret
		627
		628
		629	Vesa12_putpixel24:
		630
		631	mov edi,eax ; x
		632	mov eax,ebx ; y
		633	lea edi,[edi+edi*2]
384	mikedld	634	mov ebx,[BytesPerScanLine]
129	mikedld	635	mul ebx
		636	add edi,eax
		637	mov eax,edi
		638	shr eax,16
		639	call set_bank
		640	and edi,65535
384	mikedld	641	add edi,VGABasePtr
129	mikedld	642	mov eax,[esp+28]
		643	stosw
		644	shr eax,16
		645	mov [edi],al
		646	sti
		647	ret
		648
		649
		650
		651	Vesa12_putpixel32:
		652
		653	mov edi,eax ; x
		654	mov eax,ebx ; y
		655	shl edi,2
384	mikedld	656	mov ebx,[BytesPerScanLine]
129	mikedld	657	mul ebx
		658	add edi,eax
		659	mov eax,edi
		660	shr eax,16
		661	call set_bank
		662	and edi,65535
384	mikedld	663	add edi,VGABasePtr
129	mikedld	664	mov ecx,[esp+28]
		665	mov [edi],ecx
		666	sti
		667	ret
		668
		669
		670	Vesa12_getpixel24:
		671
		672	mov edi,eax ; x
		673	mov eax,ebx ; y
		674	lea edi,[edi+edi*2]
384	mikedld	675	mov ebx,[BytesPerScanLine]
129	mikedld	676	mul ebx
		677	add edi,eax
		678	mov eax,edi
		679	shr eax,16
		680	call set_bank
		681	and edi,65535
384	mikedld	682	add edi,VGABasePtr
129	mikedld	683	mov ecx,[edi]
		684	and ecx,255256256+255*256+255
		685	sti
		686	ret
		687
		688
		689	Vesa12_getpixel32:
		690
		691	mov edi,eax ; x
		692	mov eax,ebx ; y
		693	shl edi,2
384	mikedld	694	mov ebx,[BytesPerScanLine]
129	mikedld	695	xor edx,edx
		696	mul ebx
		697	add edi,eax
		698	mov eax,edi
		699	shr eax,16
		700	call set_bank
		701	and edi,65535
384	mikedld	702	add edi,VGABasePtr
129	mikedld	703	mov ecx,[edi]
		704	and ecx,255256256+255*256+255
		705	sti
		706
		707	ret
		708
		709
		710
		711	vesa12_putimage:
384	mikedld	712	; ebx = pointer to image
		713	; ecx = size [x\|y]
		714	; edx = coordinates [x\|y]
		715	; ebp = pointer to 'get' function
		716	; esi = pointer to 'init' function
		717	; edi = parameter for 'get' function
129	mikedld	718
		719	; mov ebx,image
		720	; mov ecx,320*65536+240
		721	; mov edx,20*65536+20
		722
		723	call [disable_mouse]
		724
		725	mov [novesachecksum],dword 0
		726	push esi
		727	push edi
		728	push eax
		729	push ebx
		730	push ecx
		731	push edx
		732	movzx eax,word [esp+2]
		733	movzx ebx,word [esp+0]
384	mikedld	734	mov ecx,[TASK_BASE]
129	mikedld	735	add eax,[ecx-twdw+WDATA.box.left]
		736	add ebx,[ecx-twdw+WDATA.box.top]
		737	push eax
		738	mov eax,ebx ; y
384	mikedld	739	mul dword [BytesPerScanLine]
129	mikedld	740	pop ecx
		741	add eax,ecx ; x
		742	add eax,ecx
		743	add eax,ecx
384	mikedld	744	cmp [ScreenBPP],byte 24 ; 24 or 32 bpp ? - x start
129	mikedld	745	jz pi2412
		746	add eax,ecx
		747
		748	pi2412:
		749
384	mikedld	750	add eax,[LFBAddress]
129	mikedld	751	mov edi,eax
		752
		753	; x size
		754
384	mikedld	755	movzx ecx,word [esp+6]
129	mikedld	756
		757	mov esi,[esp+8]
		758	movzx ebx,word [esp+4]
		759
		760	; check limits while draw ?
		761
		762	push ecx
384	mikedld	763	mov eax,[TASK_BASE]
		764	cmp dword [eax+draw_data-CURRENT_TASK+RECT.left], 0
129	mikedld	765	jnz dbcblimitlset212
384	mikedld	766	cmp dword [eax+draw_data-CURRENT_TASK+RECT.top], 0
129	mikedld	767	jnz dbcblimitlset212
384	mikedld	768	mov ecx,[eax+draw_data-CURRENT_TASK+RECT.right]
		769	cmp ecx,[ScreenWidth]
129	mikedld	770	jnz dbcblimitlset212
384	mikedld	771	mov ecx,[eax+draw_data-CURRENT_TASK+RECT.bottom]
		772	cmp ecx,[ScreenHeight]
129	mikedld	773	jnz dbcblimitlset212
		774	pop ecx
384	mikedld	775	push 0
129	mikedld	776	jmp dbcblimitlno212
		777
		778	dbcblimitlset212:
		779
		780	pop ecx
384	mikedld	781	push 1
129	mikedld	782
		783	dbcblimitlno212:
		784
384	mikedld	785	cmp [ScreenBPP],byte 24 ; 24 or 32 bpp ?
		786	jnz pi32bit12
129	mikedld	787
		788	pi24bit12:
		789
		790	newpi12:
		791
		792	push edi
		793	push ecx
		794	push ebx
		795
384	mikedld	796	mov edx,edi
		797	sub edx,[LFBAddress]
129	mikedld	798	mov ebx,3
		799	div ebx
384	mikedld	800	add edx,WinMapAddress
		801	mov ebx,[CURRENT_TASK]
		802	mov bh,[esp+4*3]
129	mikedld	803
		804	np2412:
		805
384	mikedld	806	cmp bl,[edx]
129	mikedld	807	jnz imp24no12
384	mikedld	808	; mov eax,[esi]
		809	push dword [esp+4*3+20]
		810	call ebp
		811	; cmp bh,0
		812	; jz imp24yes12
129	mikedld	813	; call dbcplimit
		814	; jnz imp24no12
		815
		816	imp24yes12:
		817
384	mikedld	818	push edi
129	mikedld	819	push eax
		820	mov eax,edi
384	mikedld	821	sub eax,[LFBAddress]
129	mikedld	822	shr eax,16
		823	call set_bank
384	mikedld	824	pop eax
129	mikedld	825	and edi,0xffff
384	mikedld	826	add edi,VGABasePtr
		827	mov [edi],ax
		828	shr eax,16
		829	mov [edi+2],al
129	mikedld	830	pop edi
		831
		832	imp24no12:
		833
384	mikedld	834	inc edx
		835	; add esi,3
129	mikedld	836	add edi,3
		837	dec ecx
		838	jnz np2412
		839
		840	np24d12:
		841
		842	pop ebx
		843	pop ecx
		844	pop edi
		845
384	mikedld	846	add edi,[BytesPerScanLine]
		847	add esi,[esp+32]
129	mikedld	848	dec ebx
384	mikedld	849	jnz newpi12
129	mikedld	850
		851	nonewpi12:
		852
384	mikedld	853	pop eax edx ecx ebx eax edi esi
		854	xor eax, eax
		855	ret
129	mikedld	856
		857
		858	pi32bit12:
		859
		860	newpi3212:
		861
		862	push edi
		863	push ecx
		864	push ebx
		865
384	mikedld	866	mov edx,edi
		867	sub edx,[LFBAddress]
		868	shr edx,2
		869	add edx,WinMapAddress
		870	mov ebx,[CURRENT_TASK]
		871	mov bh,[esp+4*3]
129	mikedld	872
		873	np3212:
		874
384	mikedld	875	cmp bl,[edx]
129	mikedld	876	jnz imp32no12
384	mikedld	877	; mov eax,[esi]
		878	push dword [esp+4*3+20]
		879	call ebp
		880	; cmp bh,0
		881	; jz imp32yes12
129	mikedld	882	; call dbcplimit
		883	; jnz imp32no12
		884
		885	imp32yes12:
		886
384	mikedld	887	push edi
129	mikedld	888	push eax
		889	mov eax,edi
384	mikedld	890	sub eax,[LFBAddress]
129	mikedld	891	shr eax,16
		892	call set_bank
384	mikedld	893	pop eax
129	mikedld	894	and edi,0xffff
384	mikedld	895	mov [edi+VGABasePtr],eax
129	mikedld	896	pop edi
		897
		898	imp32no12:
		899
384	mikedld	900	inc edx
		901	; add esi,3
129	mikedld	902	add edi,4
		903	dec ecx
		904	jnz np3212
		905
		906	np32d12:
		907
		908	pop ebx
		909	pop ecx
		910	pop edi
		911
384	mikedld	912	add edi,[BytesPerScanLine]
129	mikedld	913	dec ebx
384	mikedld	914	jnz newpi3212
129	mikedld	915
		916	nonewpi3212:
		917
384	mikedld	918	pop eax edx ecx ebx eax edi esi
		919	xor eax, eax
		920	ret
129	mikedld	921
		922
		923	vesa12_read_screen_pixel:
		924
		925	and eax,0x3FFFFF
384	mikedld	926	cmp [ScreenBPP],byte 24 ; 24 or 32 bpp ?
129	mikedld	927	jz v12rsp24
		928	mov edi,eax
		929	shl edi,2
		930	mov eax,edi
		931	shr eax,16
		932	call set_bank
		933	and edi,65535
384	mikedld	934	add edi,VGABasePtr
129	mikedld	935	mov eax,[edi]
		936	and eax,0x00ffffff
		937	ret
		938	v12rsp24:
		939
		940	imul eax,3
		941	mov edi,eax
		942	shr eax,16
		943	call set_bank
		944	and edi,65535
384	mikedld	945	add edi,VGABasePtr
129	mikedld	946	mov eax,[edi]
		947	and eax,0x00ffffff
		948	ret
		949

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(root)/kernel/branches/gfx_kernel/video/vesa12.inc – Rev 384