WebSVN – Kolibri OS – Blame – /kernel/trunk/video/vesa12.inc

Rev	Author	Line No.	Line
2288	clevermous	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
5363	yogev_ezra	3	;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
2288	clevermous	4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;; VESA12.INC ;;
		7	;; ;;
		8	;; Vesa 1.2 functions for MenuetOS ;;
		9	;; ;;
		10	;; Copyright 2002 Ville Turjanmaa ;;
		11	;; ;;
		12	;; quickcode@mail.ru - bankswitch for S3 cards ;;
		13	;; ;;
		14	;; See file COPYING for details ;;
		15	;; ;;
		16	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		17
		18	$Revision: 9679 $
		19
		20
7136	dunkaist	21	TRIDENT = 0
		22	S3_VIDEO = 0
		23	INTEL_VIDEO = 0
2288	clevermous	24
		25	if TRIDENT
		26	if S3_VIDEO or INTEL_VIDEO
		27	stop
		28	end if
		29	end if
		30
		31	if S3_VIDEO
		32	if TRIDENT or INTEL_VIDEO
		33	stop
		34	end if
		35	end if
		36
		37	if INTEL_VIDEO
		38	if S3_VIDEO or TRIDENT
		39	stop
		40	end if
		41	end if
		42
		43
		44	; A complete video driver should include the following types of function
		45	;
		46	; Putpixel
		47	; Getpixel
		48	;
		49	; Drawimage
		50	; Drawbar
		51	;
		52	; Drawbackground
		53	;
		54	;
		55	; Modifying the set_bank -function is mostly enough
		56	; for different Vesa 1.2 setups.
		57
		58	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
		59	; set_bank for Trident videocards, work on Trident 9440
		60	; modified by Mario79
		61
		62	if TRIDENT
		63	set_bank:
		64	pushfd
		65	cli
		66	cmp al, [BANK_RW]
		67	je .retsb
		68
		69	mov [BANK_RW], al
		70	push dx
		71	mov dx, 3D8h
		72	out dx, al
		73	pop dx
		74	.retsb:
		75	popfd
		76	ret
		77	end if
		78
		79	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
		80	; set_bank for S3 videocards, work on S3 ViRGE PCI (325)
		81	; modified by kmeaw
		82
		83	if S3_VIDEO
		84	set_bank:
		85	pushfd
		86	cli
		87	cmp al, [BANK_RW]
		88	je .retsb
		89
		90	mov [BANK_RW], al
		91	push ax
		92	push dx
		93	push cx
		94	mov cl, al
		95	mov dx, 0x3D4
		96	mov al, 0x38
		97	out dx, al ;CR38 Register Lock 1 ;Note: Traditionally 48h is used to
		98	;unlock and 00h to lock
		99	inc dx
		100	mov al, 0x48
		101	out dx, al ;3d5 -?
		102	dec dx
		103	mov al, 0x31
		104	out dx, al ;CR31 Memory Configuration Register
		105	;0 Enable Base Address Offset (CPUA BASE). Enables bank operation if set, ;disables if clear.
		106	;4-5 Bit 16-17 of the Display Start Address. For the 801/5,928 see index 51h,
		107	;for the 864/964 see index 69h.
		108
		109	inc dx
		110	in al, dx
		111	dec dx
		112	mov ah, al
		113	mov al, 0x31
		114	out dx, ax
		115	mov al, ah
		116	or al, 9
		117	inc dx
		118	out dx, al
		119	dec dx
		120	mov al, 0x35
		121	out dx, al ;CR35 CRT Register Lock
		122	inc dx
		123	in al, dx
		124	dec dx
		125	and al, 0xF0
		126	mov ch, cl
		127	and ch, 0x0F
		128	or ch, al
		129	mov al, 0x35
		130	out dx, al
		131	inc dx
		132	mov al, ch
		133	out dx, ax
		134	dec dx
		135	mov al, 0x51 ;Extended System Control 2 Register
		136	out dx, al
		137	inc dx
		138	in al, dx
		139	dec dx
		140	and al, 0xF3
		141	shr cl, 2
		142	and cl, 0x0C
		143	or cl, al
		144	mov al, 0x51
		145	out dx, al
		146	inc dx
		147	mov al, cl
		148	out dx, al
		149	dec dx
		150	mov al, 0x38
		151	out dx, al
		152	inc dx
		153	xor al, al
		154	out dx, al
		155	dec dx
		156	pop cx
		157	pop dx
		158	pop ax
		159	.retsb:
		160	popfd
		161	ret
		162	end if
		163
		164	;Set bank function for Intel 810/815 chipsets
		165	; ***Modified by Protopopius, Russia.***
		166	; ******* http://menuetos.hut.ru ************
		167	; ************************************************
		168
		169	if INTEL_VIDEO
		170
		171	set_bank:
		172	pushfd
		173	cli
		174
		175	cmp al, [BANK_RW]
		176	je .retsb
		177
		178	mov [BANK_RW], al
		179	push ax
		180	push dx
		181	mov dx, 3CEh
		182	mov ah, al ; Save value for later use
		183	mov al, 10h ; Index GR10 (Address Mapping)
		184	out dx, al ; Select GR10
		185	inc dl
		186	mov al, 3 ; Set bits 0 and 1 (Enable linear page mapping)
		187	out dx, al ; Write value
		188	dec dl
		189	mov al, 11h ; Index GR11 (Page Selector)
		190	out dx, al ; Select GR11
		191	inc dl
		192	mov al, ah ; Write address
		193	out dx, al ; Write the value
		194	pop dx
		195	pop ax
		196	.retsb:
		197	popfd
		198	ret
		199	end if
		200
		201	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!}
		202
		203	if (TRIDENT or S3_VIDEO or INTEL_VIDEO)
		204	else
		205	set_bank:
		206	pushfd
		207	cli
		208
		209	cmp al, [BANK_RW]
		210	je .retsb
		211
		212	mov [BANK_RW], al
		213	push ax
		214	push dx
		215	mov ah, al
		216	mov dx, 0x03D4
		217	mov al, 0x39
		218	out dx, al
		219	inc dl
		220	mov al, 0xA5
		221	out dx, al
		222	dec dl
		223	mov al, 6Ah
		224	out dx, al
		225	inc dl
		226	mov al, ah
		227	out dx, al
		228	dec dl
		229	mov al, 0x39
		230	out dx, al
		231	inc dl
		232	mov al, 0x5A
		233	out dx, al
		234	dec dl
		235	pop dx
		236	pop ax
		237
		238	.retsb:
		239	popfd
		240	ret
		241	end if
		242
		243	vesa12_drawbackground:
		244
		245	call [_display.disable_mouse]
		246
		247	push eax
		248	push ebx
		249	push ecx
		250	push edx
		251
		252	xor edx, edx
		253	mov eax, dword[BgrDataWidth]
		254	mov ebx, dword[BgrDataHeight]
		255	mul ebx
		256	mov ebx, 3
		257	mul ebx
		258	mov [imax], eax
		259	mov eax, [draw_data+32+RECT.left]
		260	mov ebx, [draw_data+32+RECT.top]
		261	xor edi, edi;no force
		262
		263	v12dp3:
		264
		265	push eax
		266	push ebx
		267
		268	cmp [BgrDrawMode], dword 1 ; tiled background
		269	jne no_vesa12_tiled_bgr
		270
		271	push edx
		272
		273	xor edx, edx
		274	div dword [BgrDataWidth]
		275
		276	push edx
		277	mov eax, ebx
		278	xor edx, edx
		279	div dword [BgrDataHeight]
		280	mov ebx, edx
		281	pop eax
		282
		283	pop edx
		284
		285	no_vesa12_tiled_bgr:
		286
		287	cmp [BgrDrawMode], dword 2 ; stretched background
		288	jne no_vesa12_stretched_bgr
		289
		290	push edx
		291
		292	mul dword [BgrDataWidth]
		293	mov ecx, [Screen_Max_X]
		294	inc ecx
		295	div ecx
		296
		297	push eax
		298	mov eax, ebx
		299	mul dword [BgrDataHeight]
		300	mov ecx, [Screen_Max_Y]
		301	inc ecx
		302	div ecx
		303	mov ebx, eax
		304	pop eax
		305
		306	pop edx
		307
		308	no_vesa12_stretched_bgr:
		309
		310
		311	mov esi, ebx
		312	imul esi, dword [BgrDataWidth]
		313	add esi, eax
		314	lea esi, [esi*3]
		315	add esi, [img_background];IMG_BACKGROUND
		316	pop ebx
		317	pop eax
		318
		319	v12di4:
		320
		321	mov cl, [esi+2]
		322	shl ecx, 16
		323	mov cx, [esi]
		324	pusha
		325	mov esi, eax
		326	mov edi, ebx
		327	mov eax, [Screen_Max_X]
		328	add eax, 1
		329	mul ebx
		330	add eax, [_WinMapAddress]
		331	cmp [eax+esi], byte 1
		332	jnz v12nbgp
		333	mov eax, [BytesPerScanLine]
		334	mov ebx, edi
		335	mul ebx
		336	add eax, esi
		337	lea eax, [VGABasePtr+eax+esi*2]
		338	cmp [ScreenBPP], byte 24
		339	jz v12bgl3
		340	add eax, esi
		341
		342	v12bgl3:
		343
		344	push ebx
		345	push eax
		346
		347	sub eax, VGABasePtr
		348
		349	shr eax, 16
		350	call set_bank
		351	pop eax
		352	and eax, 65535
		353	add eax, VGABasePtr
		354	pop ebx
		355
		356	mov [eax], cx
		357	add eax, 2
		358	shr ecx, 16
		359	mov [eax], cl
		360	sti
		361
		362	v12nbgp:
		363
		364	popa
		365	add esi, 3
		366	inc eax
		367	cmp eax, [draw_data+32+RECT.right]
		368	jg v12nodp31
		369	jmp v12dp3
		370
		371	v12nodp31:
		372
		373	mov eax, [draw_data+32+RECT.left]
		374	inc ebx
		375	cmp ebx, [draw_data+32+RECT.bottom]
		376	jg v12dp4
		377	jmp v12dp3
		378
		379	v12dp4:
		380
		381	pop edx
		382	pop ecx
		383	pop ebx
		384	pop eax
		385	ret
		386
		387
		388	vesa12_drawbar:
		389
		390	call [_display.disable_mouse]
		391
		392	;; mov [novesachecksum],dword 0
		393	sub edx, ebx
		394	sub ecx, eax
		395	push esi
		396	push edi
		397	push eax
		398	push ebx
		399	push ecx
		400	push edx
9679	Doczom	401	;mov ecx, [TASK_BASE]
		402	;add eax, [ecx-twdw+WDATA.box.left]
		403	;add ebx, [ecx-twdw+WDATA.box.top]
		404	mov ecx, [current_slot_idx]
		405	shl ecx, 5
		406	add eax, [ecx + window_data + WDATA.box.left]
		407	add ebx, [ecx + window_data + WDATA.box.top]
2288	clevermous	408	push eax
		409	mov eax, ebx ; y
		410	mov ebx, [BytesPerScanLine]
		411	mul ebx
		412	pop ecx
		413	add eax, ecx ; x
		414	add eax, ecx
		415	add eax, ecx
		416	cmp [ScreenBPP], byte 24; 24 or 32 bpp ? - x start
		417	jz dbpi2412
		418	add eax, ecx
		419
		420	dbpi2412:
		421
		422	add eax, VGABasePtr
		423	mov edi, eax
		424
		425	; x size
		426
		427	mov eax, [esp+4]; [esp+6]
		428	mov ecx, eax
		429	add ecx, eax
		430	add ecx, eax
		431	cmp [ScreenBPP], byte 24; 24 or 32 bpp ? - x size
		432	jz dbpi24312
		433	add ecx, eax
		434
		435	dbpi24312:
		436
		437	mov ebx, [esp+0]
		438
		439	; check limits ?
		440
		441	push eax
		442	push ecx
		443	mov eax, [TASK_BASE]
		444	mov ecx, [eax+draw_data-CURRENT_TASK+RECT.left]
		445	cmp ecx, 0
		446	jnz dbcblimitlset12
		447	mov ecx, [eax+draw_data-CURRENT_TASK+RECT.top]
		448	cmp ecx, 0
		449	jnz dbcblimitlset12
		450	mov ecx, [eax+draw_data-CURRENT_TASK+RECT.right]
		451	cmp ecx, [Screen_Max_X]
		452	jnz dbcblimitlset12
		453	mov ecx, [eax+draw_data-CURRENT_TASK+RECT.bottom]
		454	cmp ecx, [Screen_Max_Y]
		455	jnz dbcblimitlset12
		456	pop ecx
		457	pop eax
		458	push dword 0
		459	jmp dbcblimitlno12
		460
		461	dbcblimitlset12:
		462
		463	pop ecx
		464	pop eax
		465	push dword 1
		466
		467	dbcblimitlno12:
		468
		469	cmp [ScreenBPP], byte 24; 24 or 32 bpp ?
		470	jz dbpi24bit12
		471	jmp dbpi32bit12
		472
		473
		474	; DRAWBAR 24 BBP
		475
		476
		477	dbpi24bit12:
		478
		479	push eax
		480	push ebx
		481	push edx
		482	mov eax, ecx
		483	mov ebx, 3
		484	div ebx
		485	mov ecx, eax
		486	pop edx
		487	pop ebx
		488	pop eax
		489	cld
		490
		491	dbnewpi12:
		492
		493	push ebx
		494	push edi
		495	push ecx
		496
		497	xor edx, edx
		498	mov eax, edi
		499	sub eax, VGABasePtr
		500	mov ebx, 3
		501	div ebx
		502	add eax, [_WinMapAddress]
		503	mov ebx, [CURRENT_TASK]
		504	cld
		505
		506	dbnp2412:
		507
		508	mov dl, [eax]
		509	push eax
		510	push ecx
		511	cmp dl, bl
		512	jnz dbimp24no12
		513	cmp [esp+5*4], dword 0
		514	jz dbimp24yes12
		515	; call dbcplimit
		516	; jnz dbimp24no12
		517
		518	dbimp24yes12:
		519
		520	push edi
		521	mov eax, edi
		522	sub eax, VGABasePtr
		523	shr eax, 16
		524	call set_bank
		525	and edi, 0xffff
		526	add edi, VGABasePtr
		527	mov eax, [esp+8+3*4+16+4+4]
		528	stosw
		529	shr eax, 16
		530	stosb
		531	sti
		532	pop edi
		533	add edi, 3
		534	pop ecx
		535	pop eax
		536	inc eax
		537	loop dbnp2412
		538	jmp dbnp24d12
		539
		540	dbimp24no12:
		541
		542	pop ecx
		543	pop eax
		544	cld
		545	add edi, 3
		546	inc eax
		547	loop dbnp2412
		548
		549	dbnp24d12:
		550
		551	mov eax, [esp+3*4+16+4]
		552	test eax, 0x80000000
		553	jz nodbgl2412
		554	cmp al, 0
		555	jz nodbgl2412
		556	dec eax
		557	mov [esp+3*4+16+4], eax
		558
		559	nodbgl2412:
		560
		561	pop ecx
		562	pop edi
		563	pop ebx
		564	add edi, [BytesPerScanLine]
		565	dec ebx
		566	jz dbnonewpi12
		567	jmp dbnewpi12
		568
		569	dbnonewpi12:
		570
		571	add esp, 7*4
		572
		573	ret
		574
		575
		576	; DRAWBAR 32 BBP
		577
		578
		579	dbpi32bit12:
		580
		581	cld
		582	shr ecx, 2
		583
		584	dbnewpi3212:
		585
		586	push ebx
		587	push edi
		588	push ecx
		589
		590	mov eax, edi
		591	sub eax, VGABasePtr
		592	shr eax, 2
		593	add eax, [_WinMapAddress]
		594	mov ebx, [CURRENT_TASK]
		595	cld
		596
		597	dbnp3212:
		598
		599	mov dl, [eax]
		600	push eax
		601	push ecx
		602	cmp dl, bl
		603	jnz dbimp32no12
		604	cmp [esp+5*4], dword 0
		605	jz dbimp32yes12
		606	; call dbcplimit
		607	; jnz dbimp32no12
		608
		609	dbimp32yes12:
		610
		611	push edi
		612	mov eax, edi
		613	sub eax, VGABasePtr
		614	shr eax, 16
		615	call set_bank
		616	and edi, 0xffff
		617	add edi, VGABasePtr
		618	mov eax, [esp+8+3*4+16+4+4]
		619	stosw
		620	shr eax, 16
		621	stosb
		622	sti
		623	pop edi
		624	add edi, 4
		625	inc ebp
		626	pop ecx
		627	pop eax
		628	inc eax
		629	loop dbnp3212
		630	jmp dbnp32d12
		631
		632	dbimp32no12:
		633
		634	pop ecx
		635	pop eax
		636	inc eax
		637	add edi, 4
		638	inc ebp
		639	loop dbnp3212
		640
		641	dbnp32d12:
		642
		643	mov eax, [esp+12+16+4]
		644	test eax, 0x80000000
		645	jz nodbgl3212
		646	cmp al, 0
		647	jz nodbgl3212
		648	dec eax
		649	mov [esp+12+16+4], eax
		650
		651	nodbgl3212:
		652
		653	pop ecx
		654	pop edi
		655	pop ebx
		656	add edi, [BytesPerScanLine]
		657	dec ebx
		658	jz nodbnewpi3212
		659	jmp dbnewpi3212
		660
		661	nodbnewpi3212:
		662
		663	add esp, 7*4
		664	ret
		665
		666
		667	Vesa12_putpixel24:
		668
		669	mov edi, eax; x
		670	mov eax, ebx; y
		671	lea edi, [edi+edi*2]
		672	mov ebx, [BytesPerScanLine]
		673	mul ebx
		674	add edi, eax
		675	mov eax, edi
		676	shr eax, 16
		677	call set_bank
		678	and edi, 65535
		679	add edi, VGABasePtr
		680	mov eax, [esp+28]
		681	stosw
		682	shr eax, 16
		683	mov [edi], al
		684	sti
		685	ret
		686
		687
		688
		689	Vesa12_putpixel32:
		690
		691	mov edi, eax; x
		692	mov eax, ebx; y
		693	shl edi, 2
		694	mov ebx, [BytesPerScanLine]
		695	mul ebx
		696	add edi, eax
		697	mov eax, edi
		698	shr eax, 16
		699	call set_bank
		700	and edi, 65535
		701	add edi, VGABasePtr
		702	mov ecx, [esp+28]
		703	mov [edi], ecx
		704	sti
		705	ret
		706
		707
		708	Vesa12_getpixel24:
		709
		710	mov edi, eax; x
		711	mov eax, ebx; y
		712	lea edi, [edi+edi*2]
		713	mov ebx, [BytesPerScanLine]
		714	mul ebx
		715	add edi, eax
		716	mov eax, edi
		717	shr eax, 16
		718	call set_bank
		719	and edi, 65535
		720	add edi, VGABasePtr
		721	mov ecx, [edi]
		722	and ecx, 255256256+255*256+255
		723	sti
		724	ret
		725
		726
		727	Vesa12_getpixel32:
		728
		729	mov edi, eax; x
		730	mov eax, ebx; y
		731	shl edi, 2
		732	mov ebx, [BytesPerScanLine]
		733	xor edx, edx
		734	mul ebx
		735	add edi, eax
		736	mov eax, edi
		737	shr eax, 16
		738	call set_bank
		739	and edi, 65535
		740	add edi, VGABasePtr
		741	mov ecx, [edi]
		742	and ecx, 255256256+255*256+255
		743	sti
		744
		745	ret
		746
		747
		748
		749	vesa12_putimage:
		750	; ebx = pointer to image
		751	; ecx = size [x\|y]
		752	; edx = coordinates [x\|y]
		753	; ebp = pointer to 'get' function
		754	; esi = pointer to 'init' function
		755	; edi = parameter for 'get' function
		756
		757	; mov ebx,image
		758	; mov ecx,320*65536+240
		759	; mov edx,20*65536+20
		760
		761	call [_display.disable_mouse]
		762
		763	mov [novesachecksum], dword 0
		764	push esi
		765	push edi
		766	push eax
		767	push ebx
		768	push ecx
		769	push edx
		770	movzx eax, word [esp+2]
		771	movzx ebx, word [esp+0]
9679	Doczom	772	;mov ecx, [TASK_BASE]
		773	;add eax, [ecx-twdw+WDATA.box.left]
		774	;add ebx, [ecx-twdw+WDATA.box.top]
		775	mov ecx, [current_slot_idx]
		776	shl ecx, 5
		777	add eax, [ecx + window_data + WDATA.box.left]
		778	add ebx, [ecx + window_data + WDATA.box.top]
2288	clevermous	779	push eax
		780	mov eax, ebx ; y
		781	mul dword [BytesPerScanLine]
		782	pop ecx
		783	add eax, ecx ; x
		784	add eax, ecx
		785	add eax, ecx
		786	cmp [ScreenBPP], byte 24; 24 or 32 bpp ? - x start
		787	jz pi2412
		788	add eax, ecx
		789
		790	pi2412:
		791
		792	add eax, VGABasePtr
		793	mov edi, eax
		794
		795	; x size
		796
		797	movzx ecx, word [esp+6]
		798
		799	mov esi, [esp+8]
		800	movzx ebx, word [esp+4]
		801
		802	; check limits while draw ?
		803
		804	push ecx
		805	mov eax, [TASK_BASE]
		806	cmp dword [eax+draw_data-CURRENT_TASK+RECT.left], 0
		807	jnz dbcblimitlset212
		808	cmp dword [eax+draw_data-CURRENT_TASK+RECT.top], 0
		809	jnz dbcblimitlset212
		810	mov ecx, [eax+draw_data-CURRENT_TASK+RECT.right]
		811	cmp ecx, [Screen_Max_X]
		812	jnz dbcblimitlset212
		813	mov ecx, [eax+draw_data-CURRENT_TASK+RECT.bottom]
		814	cmp ecx, [Screen_Max_Y]
		815	jnz dbcblimitlset212
		816	pop ecx
		817	push 0
		818	jmp dbcblimitlno212
		819
		820	dbcblimitlset212:
		821
		822	pop ecx
		823	push 1
		824
		825	dbcblimitlno212:
		826
		827	cmp [ScreenBPP], byte 24; 24 or 32 bpp ?
		828	jnz pi32bit12
		829
		830	pi24bit12:
		831
		832	newpi12:
		833
		834	push edi
		835	push ecx
		836	push ebx
		837
		838	mov edx, edi
		839	sub edx, VGABasePtr
		840	mov ebx, 3
		841	div ebx
		842	add edx, [_WinMapAddress]
		843	mov ebx, [CURRENT_TASK]
		844	mov bh, [esp+4*3]
		845
		846	np2412:
		847
		848	cmp bl, [edx]
		849	jnz imp24no12
		850	; mov eax,[esi]
		851	push dword [esp+4*3+20]
		852	call ebp
		853	; cmp bh,0
		854	; jz imp24yes12
		855	; call dbcplimit
		856	; jnz imp24no12
		857
		858	imp24yes12:
		859
		860	push edi
		861	push eax
		862	mov eax, edi
		863	sub eax, VGABasePtr
		864	shr eax, 16
		865	call set_bank
		866	pop eax
		867	and edi, 0xffff
		868	add edi, VGABasePtr
		869	mov [edi], ax
		870	shr eax, 16
		871	mov [edi+2], al
		872	pop edi
		873
		874	imp24no12:
		875
		876	inc edx
		877	; add esi,3
		878	add edi, 3
		879	dec ecx
		880	jnz np2412
		881
		882	np24d12:
		883
		884	pop ebx
		885	pop ecx
		886	pop edi
		887
		888	add edi, [BytesPerScanLine]
		889	add esi, [esp+32]
		890	cmp ebp, putimage_get1bpp
		891	jz .correct
		892	cmp ebp, putimage_get2bpp
		893	jz .correct
		894	cmp ebp, putimage_get4bpp
		895	jnz @f
		896	.correct:
		897	mov eax, [esp+20]
		898	mov byte[eax], 80h
		899	@@:
		900	dec ebx
		901	jnz newpi12
		902
		903	nonewpi12:
		904
		905	pop eax edx ecx ebx eax edi esi
		906	xor eax, eax
		907	ret
		908
		909
		910	pi32bit12:
		911
		912	newpi3212:
		913
		914	push edi
		915	push ecx
		916	push ebx
		917
		918	mov edx, edi
		919	sub edx, VGABasePtr
		920	shr edx, 2
		921	add edx, [_WinMapAddress]
		922	mov ebx, [CURRENT_TASK]
		923	mov bh, [esp+4*3]
		924
		925	np3212:
		926
		927	cmp bl, [edx]
		928	jnz imp32no12
		929	; mov eax,[esi]
		930	push dword [esp+4*3+20]
		931	call ebp
		932	; cmp bh,0
		933	; jz imp32yes12
		934	; call dbcplimit
		935	; jnz imp32no12
		936
		937	imp32yes12:
		938
		939	push edi
		940	push eax
		941	mov eax, edi
		942	sub eax, VGABasePtr
		943	shr eax, 16
		944	call set_bank
		945	pop eax
		946	and edi, 0xffff
		947	mov [edi+VGABasePtr], eax
		948	pop edi
		949
		950	imp32no12:
		951
		952	inc edx
		953	; add esi,3
		954	add edi, 4
		955	dec ecx
		956	jnz np3212
		957
		958	np32d12:
		959
		960	pop ebx
		961	pop ecx
		962	pop edi
		963
		964	add edi, [BytesPerScanLine]
		965	cmp ebp, putimage_get1bpp
		966	jz .correct
		967	cmp ebp, putimage_get2bpp
		968	jz .correct
		969	cmp ebp, putimage_get4bpp
		970	jnz @f
		971	.correct:
		972	mov eax, [esp+20]
		973	mov byte[eax], 80h
		974	@@:
		975	dec ebx
		976	jnz newpi3212
		977
		978	nonewpi3212:
		979
		980	pop eax edx ecx ebx eax edi esi
		981	xor eax, eax
		982	ret
		983
		984
		985	vesa12_read_screen_pixel:
		986
		987	and eax, 0x3FFFFF
		988	cmp [ScreenBPP], byte 24; 24 or 32 bpp ?
		989	jz v12rsp24
		990	mov edi, eax
		991	shl edi, 2
		992	mov eax, edi
		993	shr eax, 16
		994	call set_bank
		995	and edi, 65535
		996	add edi, VGABasePtr
		997	mov eax, [edi]
		998	and eax, 0x00ffffff
		999	ret
		1000	v12rsp24:
		1001
		1002	imul eax, 3
		1003	mov edi, eax
		1004	shr eax, 16
		1005	call set_bank
		1006	and edi, 65535
		1007	add edi, VGABasePtr
		1008	mov eax, [edi]
		1009	and eax, 0x00ffffff
		1010	ret
		1011

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(root)/kernel/trunk/video/vesa12.inc @ 431 – Rev 9679