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

Rev	Author	Line No.	Line
1	ha	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
		32	; set_bank modified by kmeaw
		33	set_bank:
		34	cli
		35	cmp al,[0xfff2]
		36	je retsb
		37	mov [0xfff2],al
		38	push ax
		39	push dx
		40	push cx
		41	mov cl, al
		42	mov dx, 0x3D4
		43	mov al, 0x38
		44	out dx, al ;CR38 Register Lock 1 ;Note: Traditionally 48h is used to
		45	;unlock and 00h to lock
		46	inc dx
		47	mov al, 0x48
		48	out dx, al ;3d5 -?
		49	dec dx
		50	mov al, 0x31
		51	out dx, al ;CR31 Memory Configuration Register
		52	;0 Enable Base Address Offset (CPUA BASE). Enables bank operation if set, ;disables if clear.
		53	;4-5 Bit 16-17 of the Display Start Address. For the 801/5,928 see index 51h,
		54	;for the 864/964 see index 69h.
		55
		56	inc dx
		57	in al, dx
		58	dec dx
		59	mov ah, al
		60	mov al, 0x31
		61	out dx, ax
		62	mov al, ah
		63	or al, 9
		64	inc dx
		65	out dx, al
		66	dec dx
		67	mov al, 0x35
		68	out dx, al ;CR35 CRT Register Lock
		69	inc dx
		70	in al, dx
		71	dec dx
		72	and al, 0xF0
		73	mov ch, cl
		74	and ch, 0x0F
		75	or ch, al
		76	mov al, 0x35
		77	out dx, al
		78	inc dx
		79	mov al, ch
		80	out dx, ax
		81	dec dx
		82	mov al, 0x51 ;Extended System Control 2 Register
		83	out dx, al
		84	inc dx
		85	in al, dx
		86	dec dx
		87	and al, 0xF3
		88	shr cl, 2
		89	and cl, 0x0C
		90	or cl, al
		91	mov al, 0x51
		92	out dx, al
		93	inc dx
		94	mov al, cl
		95	out dx, al
		96	dec dx
		97	mov al, 0x38
		98	out dx, al
		99	inc dx
		100	xor al, al
		101	out dx, al
		102	dec dx
		103	pop cx
		104	pop dx
		105	pop ax
		106	retsb:
		107	sti
		108	ret
		109
		110	;Set bank function for Intel 810/815 chipsets
		111	; ***Modified by Protopopius, Russia.***
		112	; ******* http://menuetos.hut.ru ************
		113	; ************************************************
		114	;
		115	;set_bank:
		116	;cli
		117	;cmp al,[0xfff2]
		118	;je retsb
		119	;mov [0xfff2],al
		120	;push ax
		121	;push dx
		122	;mov dx,3CEh
		123	;mov ah,al ; Save value for later use
		124	;mov al,10h ; Index GR10 (Address Mapping)
		125	;out dx,al ; Select GR10
		126	;inc dl
		127	;mov al,3 ; Set bits 0 and 1 (Enable linear page mapping)
		128	;out dx,al ; Write value
		129	;dec dl
		130	;mov al,11h ; Index GR11 (Page Selector)
		131	;out dx,al ; Select GR11
		132	;inc dl
		133	;mov al,ah ; Write address
		134	;out dx,al ; Write the value
		135	;pop dx
		136	;pop ax
		137	;retsb:
		138	;sti
		139	;ret
		140
		141	;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!}
		142
		143	;set_bank:
		144	; cli
		145	; cmp al,[0xfff2]
		146	; je retsb
		147	; mov [0xfff2],al
		148	; push ax
		149	; push dx
		150	; mov ah,al
		151	; mov dx,0x03D4
		152	; mov al,0x39
		153	; out dx,al
		154	; inc dl
		155	; mov al,0xA5
		156	; out dx,al
		157	; dec dl
		158	; mov al,6Ah
		159	; out dx,al
		160	; inc dl
		161	; mov al,ah
		162	; out dx,al
		163	; dec dl
		164	; mov al,0x39
		165	; out dx,al
		166	; inc dl
		167	; mov al,0x5A
		168	; out dx,al
		169	; dec dl
		170	; pop dx
		171	; pop ax
		172	;
		173	; retsb:
		174	; ret
		175
		176
		177	vesa12_drawbackground:
		178
		179	call [disable_mouse]
		180
		181	push eax
		182	push ebx
		183	push ecx
		184	push edx
		185
		186	xor edx,edx
		187	mov eax,dword[WinMapAddress-8]
		188	mov ebx,dword[WinMapAddress-4]
		189	mul ebx
		190	mov ebx,3
		191	mul ebx
		192	mov [imax],eax
		193	mov eax,[draw_data+32+0]
		194	mov ebx,[draw_data+32+4]
		195	mov edi,0 ;no force
		196
		197	v12dp3:
		198
		199	push eax
		200	push ebx
		201	mov esi,0x300000
		202
		203	cmp [WinMapAddress-12],dword 1 ; tiled background
		204	jne no_vesa12_tiled_bgr
		205
		206	push edx
		207
		208	xor edx,edx
		209	mov ecx,[WinMapAddress-8]
		210	div ecx
		211	mov eax,edx
		212
		213	push eax
		214	mov eax,ebx
		215	xor edx,edx
		216	mov ecx,[WinMapAddress-4]
		217	div ecx
		218	mov ebx,edx
		219	pop eax
		220
		221	pop edx
		222
		223	no_vesa12_tiled_bgr:
		224
		225	cmp [WinMapAddress-12],dword 2 ; stretched background
		226	jne no_vesa12_stretched_bgr
		227
		228	push edx
		229
		230	imul eax,dword [WinMapAddress-8]
		231	xor edx,edx
		232	mov ecx,[0xfe00]
		233	inc ecx
		234	div ecx
		235
		236	push eax
		237	mov eax,ebx
		238	imul eax,dword [WinMapAddress-4]
		239	xor edx,edx
		240	mov ecx,[0xfe04]
		241	inc ecx
		242	div ecx
		243	mov ebx,eax
		244	pop eax
		245
		246	pop edx
		247
		248	no_vesa12_stretched_bgr:
		249
		250
		251	push eax
		252	mov eax,ebx
		253	xor edx,edx
		254	mov ebx,[WinMapAddress-8]
		255	add ebx,[WinMapAddress-8]
		256	add ebx,[WinMapAddress-8]
		257	mul ebx
		258	mov esi,eax
		259	pop eax
		260	add esi,eax
		261	add esi,eax
		262	add esi,eax
		263	add esi,0x300000
		264	pop ebx
		265	pop eax
		266
		267	v12di4:
		268
		269	mov ecx,[esi]
		270	pusha
		271	mov esi,eax
		272	mov edi,ebx
		273	mov eax,[0xfe00]
		274	add eax,1
		275	mul ebx
		276	add eax,esi
		277	add eax,WinMapAddress
		278	cmp [eax],byte 1
		279	jnz v12nbgp
		280	mov eax,[0xfe08]
		281	mov ebx,edi
		282	mul ebx
		283	add eax,esi
		284	add eax,esi
		285	add eax,esi
		286	cmp [0xFBF1],byte 24
		287	jz v12bgl3
		288	add eax,esi
		289
		290	v12bgl3:
		291
		292	push ebx
		293	push eax
		294
		295	sub eax,[0xfe80]
		296
		297	shr eax,16
		298	call set_bank
		299	pop eax
		300	and eax,65535
		301	add eax,0xa0000
		302	pop ebx
		303
		304	mov [eax],cx
		305	add eax,2
		306	shr ecx,16
		307	mov [eax],cl
		308	sti
		309
		310	v12nbgp:
		311
		312	popa
		313	add esi,3
		314	inc eax
		315	cmp eax,[draw_data+32+8]
		316	jg v12nodp31
		317	jmp v12dp3
		318
		319	v12nodp31:
		320
		321	mov eax,[draw_data+32+0]
		322	inc ebx
		323	cmp ebx,[draw_data+32+12]
		324	jg v12dp4
		325	jmp v12dp3
		326
		327	v12dp4:
		328
		329	pop edx
		330	pop ecx
		331	pop ebx
		332	pop eax
		333	ret
		334
		335
		336	vesa12_drawbar:
		337
		338	call [disable_mouse]
		339
		340	;; mov [novesachecksum],dword 0
		341	sub edx,ebx
		342	sub ecx,eax
		343	push esi
		344	push edi
		345	push eax
		346	push ebx
		347	push ecx
		348	push edx
		349	mov ecx,[0x3010]
		350	add eax,[ecx-twdw]
		351	add ebx,[ecx-twdw+4]
		352	push eax
		353	mov eax,ebx ; y
		354	mov ebx,[0xfe08]
		355	mul ebx
		356	pop ecx
		357	add eax,ecx ; x
		358	add eax,ecx
		359	add eax,ecx
		360	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ? - x start
		361	jz dbpi2412
		362	add eax,ecx
		363
		364	dbpi2412:
		365
		366	add eax,[0xfe80]
		367	mov edi,eax
		368
		369	; x size
		370
		371	mov eax,[esp+4] ; [esp+6]
		372	mov ecx,eax
		373	add ecx,eax
		374	add ecx,eax
		375	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ? - x size
		376	jz dbpi24312
		377	add ecx,eax
		378
		379	dbpi24312:
		380
		381	mov ebx,[esp+0]
		382
		383	; check limits ?
		384
		385	push eax
		386	push ecx
		387	mov eax,[0x3010]
		388	mov ecx,[eax+draw_data-0x3000+0]
		389	cmp ecx,0
		390	jnz dbcblimitlset12
		391	mov ecx,[eax+draw_data-0x3000+4]
		392	cmp ecx,0
		393	jnz dbcblimitlset12
		394	mov ecx,[eax+draw_data-0x3000+8]
		395	cmp ecx,[0xfe00]
		396	jnz dbcblimitlset12
		397	mov ecx,[eax+draw_data-0x3000+12]
		398	cmp ecx,[0xfe04]
		399	jnz dbcblimitlset12
		400	pop ecx
		401	pop eax
		402	push dword 0
		403	jmp dbcblimitlno12
		404
		405	dbcblimitlset12:
		406
		407	pop ecx
		408	pop eax
		409	push dword 1
		410
		411	dbcblimitlno12:
		412
		413	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ?
		414	jz dbpi24bit12
		415	jmp dbpi32bit12
		416
		417
		418	; DRAWBAR 24 BBP
		419
		420
		421	dbpi24bit12:
		422
		423	push eax
		424	push ebx
		425	push edx
		426	mov eax,ecx
		427	mov ebx,3
		428	div ebx
		429	mov ecx,eax
		430	pop edx
		431	pop ebx
		432	pop eax
		433	cld
		434
		435	dbnewpi12:
		436
		437	push ebx
		438	push edi
		439	push ecx
		440
		441	xor edx,edx
		442	mov eax,edi
		443	sub eax,[0xfe80]
		444	mov ebx,3
		445	div ebx
		446	add eax,WinMapAddress
		447	mov ebx,[0x3010]
		448	movzx ebx,byte[ebx+0xe]
		449	cld
		450
		451	dbnp2412:
		452
		453	mov dl,[eax]
		454	push eax
		455	push ecx
		456	cmp dl,bl
		457	jnz dbimp24no12
		458	cmp [esp+5*4],dword 0
		459	jz dbimp24yes12
		460	; call dbcplimit
		461	; jnz dbimp24no12
		462
		463	dbimp24yes12:
		464
		465	push edi
		466	mov eax,edi
		467	sub eax,[0xfe80]
		468	shr eax,16
		469	call set_bank
		470	and edi,0xffff
		471	add edi,0xa0000
		472	mov eax,[esp+8+3*4+16+4+4]
		473	stosw
		474	shr eax,16
		475	stosb
		476	sti
		477	pop edi
		478	add edi,3
		479	pop ecx
		480	pop eax
		481	inc eax
		482	loop dbnp2412
		483	jmp dbnp24d12
		484
		485	dbimp24no12:
		486
		487	pop ecx
		488	pop eax
		489	cld
		490	add edi,3
		491	inc eax
		492	loop dbnp2412
		493
		494	dbnp24d12:
		495
		496	mov eax,[esp+3*4+16+4]
		497	test eax,0x80000000
		498	jz nodbgl2412
		499	cmp al,0
		500	jz nodbgl2412
		501	dec eax
		502	mov [esp+3*4+16+4],eax
		503
		504	nodbgl2412:
		505
		506	pop ecx
		507	pop edi
		508	pop ebx
		509	add edi,[0xfe08]
		510	dec ebx
		511	jz dbnonewpi12
		512	jmp dbnewpi12
		513
		514	dbnonewpi12:
		515
		516	add esp,7*4
		517
		518	ret
		519
		520
		521	; DRAWBAR 32 BBP
		522
		523
		524	dbpi32bit12:
		525
		526	cld
		527	shr ecx,2
		528
		529	dbnewpi3212:
		530
		531	push ebx
		532	push edi
		533	push ecx
		534
		535	mov eax,edi
		536	sub eax,[0xfe80]
		537	shr eax,2
		538	add eax,WinMapAddress
		539	mov ebx,[0x3010]
		540	movzx ebx,byte[ebx+0xe]
		541	cld
		542
		543	dbnp3212:
		544
		545	mov dl,[eax]
		546	push eax
		547	push ecx
		548	cmp dl,bl
		549	jnz dbimp32no12
		550	cmp [esp+5*4],dword 0
		551	jz dbimp32yes12
		552	; call dbcplimit
		553	; jnz dbimp32no12
		554
		555	dbimp32yes12:
		556
		557	push edi
		558	mov eax,edi
		559	sub eax,[0xfe80]
		560	shr eax,16
		561	call set_bank
		562	and edi,0xffff
		563	add edi,0xa0000
		564	mov eax,[esp+8+3*4+16+4+4]
		565	stosw
		566	shr eax,16
		567	stosb
		568	sti
		569	pop edi
		570	add edi,4
		571	inc ebp
		572	pop ecx
		573	pop eax
		574	inc eax
		575	loop dbnp3212
		576	jmp dbnp32d12
		577
		578	dbimp32no12:
		579
		580	pop ecx
		581	pop eax
		582	inc eax
		583	add edi,4
		584	inc ebp
		585	loop dbnp3212
		586
		587	dbnp32d12:
		588
		589	mov eax,[esp+12+16+4]
		590	test eax,0x80000000
		591	jz nodbgl3212
		592	cmp al,0
		593	jz nodbgl3212
		594	dec eax
		595	mov [esp+12+16+4],eax
		596
		597	nodbgl3212:
		598
		599	pop ecx
		600	pop edi
		601	pop ebx
		602	add edi,[0xfe08]
		603	dec ebx
		604	jz nodbnewpi3212
		605	jmp dbnewpi3212
		606
		607	nodbnewpi3212:
		608
		609	add esp,7*4
		610	ret
		611
		612
		613	Vesa12_putpixel24:
		614
		615	mov edi,eax ; x
		616	mov eax,ebx ; y
		617	lea edi,[edi+edi*2]
		618	mov ebx,[0xfe08]
		619	mul ebx
		620	add edi,eax
		621	mov eax,edi
		622	shr eax,16
		623	call set_bank
		624	and edi,65535
		625	add edi,0xa0000
		626	mov eax,[esp+28]
		627	stosw
		628	shr eax,16
		629	mov [edi],al
		630	sti
		631	ret
		632
		633
		634
		635	Vesa12_putpixel32:
		636
		637	mov edi,eax ; x
		638	mov eax,ebx ; y
		639	shl edi,2
		640	mov ebx,[0xfe08]
		641	mul ebx
		642	add edi,eax
		643	mov eax,edi
		644	shr eax,16
		645	call set_bank
		646	and edi,65535
		647	add edi,0xa0000
		648	mov ecx,[esp+28]
		649	mov [edi],ecx
		650	sti
		651	ret
		652
		653
		654	Vesa12_getpixel24:
		655
		656	mov edi,eax ; x
		657	mov eax,ebx ; y
		658	lea edi,[edi+edi*2]
		659	mov ebx,[0xfe08]
		660	mul ebx
		661	add edi,eax
		662	mov eax,edi
		663	shr eax,16
		664	call set_bank
		665	and edi,65535
		666	add edi,0xa0000
		667	mov ecx,[edi]
		668	and ecx,255256256+255*256+255
		669	sti
		670	ret
		671
		672
		673	Vesa12_getpixel32:
		674
		675	mov edi,eax ; x
		676	mov eax,ebx ; y
		677	shl edi,2
		678	mov ebx,[0xfe08]
		679	xor edx,edx
		680	mul ebx
		681	add edi,eax
		682	mov eax,edi
		683	shr eax,16
		684	call set_bank
		685	and edi,65535
		686	add edi,0xa0000
		687	mov ecx,[edi]
		688	and ecx,255256256+255*256+255
		689	sti
		690
		691	ret
		692
		693
		694
		695	vesa12_putimage:
		696
		697	; mov ebx,image
		698	; mov ecx,320*65536+240
		699	; mov edx,20*65536+20
		700
		701	call [disable_mouse]
		702
		703	mov [novesachecksum],dword 0
		704	push esi
		705	push edi
		706	push eax
		707	push ebx
		708	push ecx
		709	push edx
		710	movzx eax,word [esp+2]
		711	movzx ebx,word [esp+0]
		712	mov ecx,[0x3010]
		713	add eax,[ecx-twdw]
		714	add ebx,[ecx-twdw+4]
		715	push eax
		716	mov eax,ebx ; y
		717	mov ebx,[0xfe08]
		718	mul ebx
		719	pop ecx
		720	add eax,ecx ; x
		721	add eax,ecx
		722	add eax,ecx
		723	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ? - x start
		724	jz pi2412
		725	add eax,ecx
		726
		727	pi2412:
		728
		729	add eax,[0xfe80]
		730	mov edi,eax
		731
		732	; x size
		733
		734	movzx eax,word [esp+6]
		735	mov ecx,eax
		736	add ecx,eax
		737	add ecx,eax
		738	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ? - x size
		739	jz pi24312
		740	add ecx,eax
		741
		742	pi24312:
		743
		744	mov esi,[esp+8]
		745	movzx ebx,word [esp+4]
		746
		747	; check limits while draw ?
		748
		749	push eax
		750	push ecx
		751	mov eax,[0x3010]
		752	mov ecx,[eax+draw_data-0x3000+0]
		753	cmp ecx,0
		754	jnz dbcblimitlset212
		755	mov ecx,[eax+draw_data-0x3000+4]
		756	cmp ecx,0
		757	jnz dbcblimitlset212
		758	mov ecx,[eax+draw_data-0x3000+8]
		759	cmp ecx,[0xfe00]
		760	jnz dbcblimitlset212
		761	mov ecx,[eax+draw_data-0x3000+12]
		762	cmp ecx,[0xfe04]
		763	jnz dbcblimitlset212
		764	pop ecx
		765	pop eax
		766	push dword 0
		767	jmp dbcblimitlno212
		768
		769	dbcblimitlset212:
		770
		771	pop ecx
		772	pop eax
		773	push dword 1
		774
		775	dbcblimitlno212:
		776
		777	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ?
		778	jz pi24bit12
		779	jmp pi32bit12
		780
		781	pi24bit12:
		782
		783	cld
		784	push eax
		785	push ebx
		786	push edx
		787	xor edx,edx
		788	mov eax,ecx
		789	mov ebx,3
		790	div ebx
		791	mov ecx,eax
		792	pop edx
		793	pop ebx
		794	pop eax
		795
		796	newpi12:
		797
		798	push edi
		799	push esi
		800	push ecx
		801	push ebx
		802
		803	xor edx,edx
		804	mov eax,edi
		805	sub eax,[0xfe80]
		806	mov ebx,3
		807	div ebx
		808	add eax,WinMapAddress
		809	mov ebx,[0x3010]
		810	mov bl,[ebx+0xe]
		811	mov bh,[esp+4*4]
		812
		813	np2412:
		814
		815	cmp bl,[eax]
		816	jnz imp24no12
		817	mov edx,[esi]
		818	cmp bh,0
		819	jz imp24yes12
		820	; call dbcplimit
		821	; jnz imp24no12
		822
		823	imp24yes12:
		824
		825	push eax
		826	push edi
		827	mov eax,edi
		828	sub eax,[0xfe80]
		829	shr eax,16
		830	call set_bank
		831	and edi,0xffff
		832	add edi,0xa0000
		833	mov [edi],edx
		834	shr edx,2
		835	mov [edi+2],dl
		836	sti
		837	pop edi
		838	pop eax
		839
		840	imp24no12:
		841
		842	inc eax
		843	add esi,3
		844	add edi,3
		845	dec ecx
		846	jnz np2412
		847
		848	np24d12:
		849
		850	pop ebx
		851	pop ecx
		852	pop esi
		853	pop edi
		854
		855	add edi,[0xfe08]
		856	xor eax,eax
		857	mov ax,[esp+4+2+4]
		858	lea eax,[eax+eax*2]
		859	add esi,eax
		860	dec ebx
		861	jz nonewpi12
		862	jmp newpi12
		863
		864	nonewpi12:
		865
		866	add esp,7*4
		867	mov eax,0
		868	ret
		869
		870
		871	pi32bit12:
		872
		873	cld
		874	shr ecx,2
		875
		876	newpi3212:
		877
		878	push edi
		879	push esi
		880	push ecx
		881	push ebx
		882
		883	mov eax,edi
		884	sub eax,[0xfe80]
		885	shr eax,2
		886	add eax,WinMapAddress
		887	mov ebx,[0x3010]
		888	mov bl,[ebx+0xe]
		889	mov bh,[esp+4*4]
		890
		891	np3212:
		892
		893	cmp bl,[eax]
		894	jnz imp32no12
		895	mov edx,[esi]
		896	cmp bh,0
		897	jz imp32yes12
		898	; call dbcplimit
		899	; jnz imp32no12
		900
		901	imp32yes12:
		902
		903	push eax
		904	push edi
		905	mov eax,edi
		906	sub eax,[0xfe80]
		907	shr eax,16
		908	call set_bank
		909	and edi,0xffff
		910	add edi,0xa0000
		911	mov [edi],edx
		912	sti
		913	pop edi
		914	pop eax
		915
		916	imp32no12:
		917
		918	inc eax
		919	add esi,3
		920	add edi,4
		921	dec ecx
		922	jnz np3212
		923
		924	np32d12:
		925
		926	pop ebx
		927	pop ecx
		928	pop esi
		929	pop edi
		930
		931	add edi,[0xfe08]
		932	movzx eax,word [esp+4+2+4]
		933	lea eax,[eax+eax*2]
		934	add esi,eax
		935	dec ebx
		936	jz nonewpi3212
		937	jmp newpi3212
		938
		939	nonewpi3212:
		940
		941	add esp,7*4
		942	mov eax,0
		943	ret
		944
		945
		946	vesa12_read_screen_pixel:
		947
		948	and eax,0x3FFFFF
		949	cmp [0xfbf1],byte 24 ; 24 or 32 bpp ?
		950	jz v12rsp24
		951	mov edi,eax
		952	shl edi,2
		953	mov eax,edi
		954	shr eax,16
		955	call set_bank
		956	and edi,65535
		957	add edi,0xa0000
		958	mov eax,[edi]
		959	and eax,0x00ffffff
		960	ret
		961	v12rsp24:
		962
		963	imul eax,3
		964	mov edi,eax
		965	shr eax,16
		966	call set_bank
		967	and edi,65535
		968	add edi,0xa0000
		969	mov eax,[edi]
		970	and eax,0x00ffffff
		971	ret
		972

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(root)/kernel/trunk/video/vesa12.inc @ 102 – Rev 1