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Int13h.asm@ 502

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Last change on this file since 502 was 493, checked in by gregli@…, 12 years ago

Separated MODULE_8BIT_IDE into the basic part used by XTIDE rev 1 and rev 2 which is PIO based, and MODULE_8BIT_IDE_ADVANCED for JRIDE and XTCF support which requires memory mapping and/or DMA. This allows for creating an 8KB image with boot menu support (but no hotkeys) for the XTIDE rev 1. Cleaned up how we reset the drive translation information, ensuring it is properly set between boot attempt on a primary and secondary drive - as a result we clean it when needed, rather than trying to always keep it clean. Also fixed translation bugs in int13h.asm where I had previously missed converting some MODULE_HOTKEYS into MODULE_DRIVEXLATE.

File size: 15.6 KB

Rev	Line
[90]	1	; Project name : XTIDE Universal BIOS
[3]	2	; Description : Int 13h BIOS functions (Floppy and Hard disk).
	3
[376]	4	;
[445]	5	; XTIDE Universal BIOS and Associated Tools
[376]	6	; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
	7	;
	8	; This program is free software; you can redistribute it and/or modify
	9	; it under the terms of the GNU General Public License as published by
	10	; the Free Software Foundation; either version 2 of the License, or
	11	; (at your option) any later version.
[445]	12	;
[376]	13	; This program is distributed in the hope that it will be useful,
	14	; but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
[445]	16	; GNU General Public License for more details.
[376]	17	; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
[445]	18	;
[376]	19
[3]	20	; Section containing code
	21	SECTION .text
	22
	23	;--------------------------------------------------------------------
	24	; Int 13h software interrupt handler.
[417]	25	; This handler changes stack to top of stolen conventional memory
	26	; and then calls the actual INT 13h handler (Int13h_DiskFunctionsHandler).
	27	;
	28	; Int13h_DiskFunctionsHandlerWithStackChange
	29	; Parameters:
	30	; AH: Bios function
	31	; DL: Drive number
	32	; Other: Depends on function
	33	; Returns:
	34	; Depends on function
	35	;--------------------------------------------------------------------
	36	%ifdef RELOCATE_INT13H_STACK
	37	ALIGN JUMP_ALIGN
	38	Int13h_DiskFunctionsHandlerWithStackChange:
	39	push ds
	40	push di
	41	call RamVars_GetSegmentToDS
	42
	43	; Store entry registers to RAMVARS
	44	mov [RAMVARS.fpInt13hEntryStack], sp
	45	mov [RAMVARS.fpInt13hEntryStack+2], ss
	46	pop WORD [RAMVARS.wStackChangeDI]
	47	pop WORD [RAMVARS.wStackChangeDS]
	48
	49	; Load new stack and restore DS and DI
	50	mov di, ds ; We do not want to overwrite DS and DI in stack
	51	mov ss, di
	52	mov sp, [RAMVARS.wNewStackOffset]
	53	lds di, [RAMVARS.dwStackChangeDSDI]
	54
	55	; Call INT 13h
	56	pushf
	57	push cs
	58	call Int13h_DiskFunctionsHandler
	59
	60	; Restore stack (we must not corrupt FLAGS!)
	61	cli
	62	%ifdef USE_386
	63	lss sp, [ss:RAMVARS.fpInt13hEntryStack]
	64	%else
	65	mov sp, [ss:RAMVARS.fpInt13hEntryStack]
	66	mov ss, [ss:RAMVARS.fpInt13hEntryStack+2]
	67	%endif
	68	pop di ; DI before stack change
	69	pop ds ; DS before stack change
	70	retf 2 ; Skip FLAGS from stack
	71	%endif ; RELOCATE_INT13H_STACK
	72
	73
	74	;--------------------------------------------------------------------
	75	; Int 13h software interrupt handler.
[3]	76	; Jumps to specific function defined in AH.
	77	;
[148]	78	; Note to developers: Do not make recursive INT 13h calls!
	79	;
	80	; Int13h_DiskFunctionsHandler
[3]	81	; Parameters:
	82	; AH: Bios function
	83	; DL: Drive number
[148]	84	; Other: Depends on function
[3]	85	; Returns:
	86	; Depends on function
	87	;--------------------------------------------------------------------
	88	ALIGN JUMP_ALIGN
[148]	89	Int13h_DiskFunctionsHandler:
[3]	90	sti ; Enable interrupts
[150]	91	cld ; String instructions to increment pointers
[443]	92	CREATE_FRAME_INTPACK_TO_SSBP SIZE_OF_IDEPACK_WITHOUT_INTPACK
[3]	93	call RamVars_GetSegmentToDS
[294]	94
[493]	95	%ifdef MODULE_DRIVEXLATE
[148]	96	call DriveXlate_ToOrBack
[414]	97	mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
[395]	98	%endif
[322]	99	call FindDPT_ForDriveNumberInDL ; DS:DI points to our DPT, or NULL if not our drive
	100	jc SHORT .NotOurDrive ; DPT not found so this is not one of our drives
[258]	101
[294]	102	.OurFunction:
[3]	103	; Jump to correct BIOS function
[148]	104	eMOVZX bx, ah
[445]	105	eSHL_IM bx, 1
[165]	106	cmp ah, 25h ; Possible EBIOS function?
[417]	107	%ifndef MODULE_EBIOS
	108	ja SHORT UnsupportedFunction
	109	jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
	110
	111	%else ; If using MODULE_EBIOS
[165]	112	ja SHORT .JumpToEbiosFunction
[148]	113	jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
[3]	114
[165]	115	ALIGN JUMP_ALIGN
	116	.JumpToEbiosFunction:
[421]	117	test BYTE [di+DPT.bFlagsLow], FLGL_DPT_LBA_AND_EBIOS_SUPPORTED
[417]	118	jz SHORT UnsupportedFunction ; No eINT 13h for CHS drives
[322]	119	sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table
[417]	120	jb SHORT UnsupportedFunction
[167]	121	cmp ah, 48h
[417]	122	ja SHORT UnsupportedFunction
[165]	123	jmp [cs:bx+g_rgwEbiosFunctionJumpTable]
[417]	124	%endif ; MODULE_EBIOS
[3]	125
[417]	126
[322]	127	ALIGN JUMP_ALIGN
	128	.NotOurDrive:
	129	test ah, ah
	130	jz SHORT .OurFunction ; We handle all function 0h requests (resets)
[260]	131
[322]	132	%ifndef MODULE_SERIAL_FLOPPY
	133	; Without floppy support, we handle only hard disk traffic for function 08h.
	134	test dl, dl
	135	jns SHORT Int13h_DirectCallToAnotherBios
	136	%endif
	137	; With floppy support, we handle all traffic for function 08h, as we need to wrap both hard disk and floppy drive counts.
	138	cmp ah, 8
	139	je SHORT .OurFunction
	140	; Fall to Int13h_DirectCallToAnotherBios
	141
[417]	142
[3]	143	;--------------------------------------------------------------------
[417]	144	; UnsupportedFunction
[3]	145	; Int13h_DirectCallToAnotherBios
	146	; Parameters:
[148]	147	; DL: Translated drive number
[3]	148	; DS: RAMVARS segment
[150]	149	; SS:BP: Ptr to IDEPACK
[148]	150	; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
[161]	151	; Other: Function specific INT 13h parameters
[3]	152	; Returns:
	153	; Depends on function
	154	; Corrupts registers:
	155	; Flags
	156	;--------------------------------------------------------------------
	157	ALIGN JUMP_ALIGN
[417]	158	UnsupportedFunction:
[3]	159	Int13h_DirectCallToAnotherBios:
[148]	160	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[150]	161	mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
	162	mov di, [bp+IDEPACK.intpack+INTPACK.di]
	163	mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
	164	push WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]	165	popf
	166	push bp
[150]	167	mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
[148]	168	int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
[3]	169
[148]	170	; Store returned values to INTPACK
	171	pop bp ; Standard INT 13h functions never uses BP as return register
	172	%ifdef USE_386
[322]	173	; mov [bp+IDEPACK.intpack+INTPACK.gs], gs
	174	; mov [bp+IDEPACK.intpack+INTPACK.fs], fs
[148]	175	%endif
[150]	176	mov [bp+IDEPACK.intpack+INTPACK.es], es
	177	mov [bp+IDEPACK.intpack+INTPACK.ds], ds
	178	mov [bp+IDEPACK.intpack+INTPACK.di], di
	179	mov [bp+IDEPACK.intpack+INTPACK.si], si
	180	mov [bp+IDEPACK.intpack+INTPACK.bx], bx
[493]	181	%ifdef MODULE_DRIVEXLATE
[150]	182	mov [bp+IDEPACK.intpack+INTPACK.dh], dh
[414]	183	%else
	184	mov [bp+IDEPACK.intpack+INTPACK.dx], dx
	185	%endif
[150]	186	mov [bp+IDEPACK.intpack+INTPACK.cx], cx
	187	mov [bp+IDEPACK.intpack+INTPACK.ax], ax
[148]	188	pushf
[150]	189	pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]	190	call RamVars_GetSegmentToDS
[414]	191
[493]	192	%ifdef MODULE_DRIVEXLATE
[414]	193	cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv] ; DL is still drive number?
[148]	194	je SHORT .ExchangeInt13hHandlers
[414]	195	mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
[148]	196	ALIGN JUMP_ALIGN
	197	.ExchangeInt13hHandlers:
[414]	198	%endif
	199
[249]	200	%ifdef USE_186
	201	push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
	202	jmp SHORT ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	203	%else
[148]	204	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[249]	205	jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
	206	%endif
[3]	207
[417]	208
[260]	209	%ifdef MODULE_SERIAL_FLOPPY
	210	;--------------------------------------------------------------------
	211	; Int13h_ReturnSuccessForFloppy
	212	;
	213	; Some operations, such as format of a floppy disk track, should just
	214	; return success, while for hard disks it should be treated as unsupported.
	215	;--------------------------------------------------------------------
	216	ALIGN JUMP_ALIGN
	217	Int13h_ReturnSuccessForFloppy:
	218	test dl, dl
[417]	219	js SHORT UnsupportedFunction
[294]	220	xor ah, ah
[417]	221	jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
[260]	222	%endif
[3]	223
[417]	224
[3]	225	;--------------------------------------------------------------------
[249]	226	; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL
	227	; Parameters:
	228	; AH: BIOS Error code
	229	; CL: Number of sectors actually transferred
	230	; SS:BP: Ptr to IDEPACK
	231	; Returns:
	232	; All registers are loaded from INTPACK
	233	;--------------------------------------------------------------------
	234	ALIGN JUMP_ALIGN
	235	Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL:
	236	mov [bp+IDEPACK.intpack+INTPACK.al], cl
	237	; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
	238
[417]	239
[249]	240	;--------------------------------------------------------------------
[148]	241	; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
	242	; Int13h_ReturnFromHandlerWithoutStoringErrorCode
[32]	243	; Parameters:
[148]	244	; AH: BIOS Error code
[417]	245	; DS: RAMVARS segment
[150]	246	; SS:BP: Ptr to IDEPACK
[32]	247	; Returns:
[148]	248	; All registers are loaded from INTPACK
[32]	249	;--------------------------------------------------------------------
	250	ALIGN JUMP_ALIGN
[148]	251	Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
[258]	252	%ifdef MODULE_SERIAL_FLOPPY
	253	mov al, [bp+IDEPACK.intpack+INTPACK.dl]
[294]	254	Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH_ALHasDriveNumber:
[258]	255	call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber
[414]	256
[258]	257	%else
[150]	258	call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
[258]	259	%endif
[414]	260
[148]	261	Int13h_ReturnFromHandlerWithoutStoringErrorCode:
[417]	262	; Always return with interrupts enabled since there are programs that rely
	263	; on INT 13h to enable interrupts.
	264	or BYTE [bp+IDEPACK.intpack+INTPACK.flags+1], (FLG_FLAGS_IF>>8)
	265	mov sp, bp ; This makes possible to exit anytime, no matter what is on stack
[443]	266	RESTORE_FRAME_INTPACK_FROM_SSBP SIZE_OF_IDEPACK_WITHOUT_INTPACK
[32]	267
	268
	269	;--------------------------------------------------------------------
[148]	270	; Int13h_CallPreviousInt13hHandler
[3]	271	; Parameters:
[148]	272	; AH: INT 13h function to call
	273	; DL: Drive number
	274	; DS: RAMVARS segment
[3]	275	; Returns:
	276	; Depends on function
[294]	277	; NOTE: ES:DI needs to be returned from the previous interrupt
[258]	278	; handler, for floppy DPT in function 08h
[3]	279	; Corrupts registers:
[258]	280	; None
[3]	281	;--------------------------------------------------------------------
	282	ALIGN JUMP_ALIGN
[148]	283	Int13h_CallPreviousInt13hHandler:
	284	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	285	int BIOS_DISK_INTERRUPT_13h
[258]	286	;;; fall-through to ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[35]	287
[3]	288	;--------------------------------------------------------------------
[148]	289	; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[3]	290	; Parameters:
	291	; DS: RAMVARS segment
	292	; Returns:
[148]	293	; Nothing
[3]	294	; Corrupts registers:
[258]	295	; Nothing
	296	; Note: Flags are preserved
[3]	297	;--------------------------------------------------------------------
	298	ALIGN JUMP_ALIGN
[148]	299	ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
	300	push es
[258]	301	push si
	302	LOAD_BDA_SEGMENT_PRESERVE_FLAGS_TO es, si
	303	mov si, [RAMVARS.fpOldI13h]
[150]	304	cli
[258]	305	xchg si, [es:BIOS_DISK_INTERRUPT_13h*4]
	306	mov [RAMVARS.fpOldI13h], si
	307	mov si, [RAMVARS.fpOldI13h+2]
	308	xchg si, [es:BIOS_DISK_INTERRUPT_13h*4+2]
[181]	309	sti
[258]	310	mov [RAMVARS.fpOldI13h+2], si
	311	pop si
[148]	312	pop es
	313	ret
[28]	314
[35]	315
[150]	316	;--------------------------------------------------------------------
	317	; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
	318	; Int13h_SetErrorCodeToIntpackInSSBPfromAH
	319	; Parameters:
	320	; AH: BIOS error code (00h = no error)
	321	; SS:BP: Ptr to IDEPACK
	322	; Returns:
	323	; SS:BP: Ptr to IDEPACK with error condition set
	324	; Corrupts registers:
	325	; DS, DI
	326	;--------------------------------------------------------------------
	327	ALIGN JUMP_ALIGN
[258]	328	%ifdef MODULE_SERIAL_FLOPPY
	329	Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber:
	330	; Store error code to BDA
	331	mov bx, BDA.bHDLastSt
	332	test al, al
[414]	333	js SHORT .HardDisk
[258]	334	mov bl, BDA.bFDRetST & 0xff
	335	.HardDisk:
	336	LOAD_BDA_SEGMENT_TO ds, di
[294]	337	mov [bx], ah
[417]	338	; Fall to Int13h_SetErrorCodeToIntpackInSSBPfromAH
	339
[258]	340	%else
[150]	341	Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
	342	; Store error code to BDA
[294]	343	LOAD_BDA_SEGMENT_TO ds, di
[150]	344	mov [BDA.bHDLastSt], ah
[417]	345	; Fall to Int13h_SetErrorCodeToIntpackInSSBPfromAH
[258]	346	%endif
[35]	347
[150]	348	; Store error code to INTPACK
	349	Int13h_SetErrorCodeToIntpackInSSBPfromAH:
	350	mov [bp+IDEPACK.intpack+INTPACK.ah], ah
	351	test ah, ah
	352	jnz SHORT .SetCFtoIntpack
	353	and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
	354	ret
	355	.SetCFtoIntpack:
	356	or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
	357	ret
	358
	359
[3]	360	; Jump table for correct BIOS function
	361	ALIGN WORD_ALIGN
	362	g_rgw13hFuncJump:
[417]	363	dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
	364	dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
	365	dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
	366	dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
	367	dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
[260]	368	%ifdef MODULE_SERIAL_FLOPPY
[417]	369	dw Int13h_ReturnSuccessForFloppy ; 05h, Format Disk Track (XT, AT, EISA)
[260]	370	%else
[417]	371	dw UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
[260]	372	%endif
[417]	373	dw UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
	374	dw UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
	375	dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
	376	dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
	377	dw UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
	378	dw UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
	379	dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
	380	dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
	381	dw UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
	382	dw UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
	383	dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
	384	dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
	385	dw UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
	386	dw UnsupportedFunction ; 13h, Drive Diagnostic (XT)
	387	dw UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
	388	dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
	389	dw UnsupportedFunction ; 16h,
	390	dw UnsupportedFunction ; 17h,
	391	dw UnsupportedFunction ; 18h,
	392	dw UnsupportedFunction ; 19h, Park Heads (PS/2)
	393	dw UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
	394	dw UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
	395	dw UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
	396	dw UnsupportedFunction ; 1Dh,
[493]	397	%ifdef MODULE_8BIT_IDE_ADVANCED
[471]	398	dw AH1Eh_HandlerForXTCFfeatures ; 1Eh, Lo-tech XT-CF features (XTIDE Universal BIOS)
	399	%else
	400	dw UnsupportedFunction ; 1Eh,
	401	%endif
[417]	402	dw UnsupportedFunction ; 1Fh,
	403	dw UnsupportedFunction ; 20h,
	404	dw UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
	405	dw UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
	406	dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
	407	dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
	408	dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
[165]	409
[176]	410	%ifdef MODULE_EBIOS
[165]	411	g_rgwEbiosFunctionJumpTable:
[417]	412	dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
	413	dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
	414	dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
	415	dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
	416	dw UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
	417	dw UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
	418	dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
	419	dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
	420	; dw UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
	421	; dw UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
	422	; dw UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
	423	; dw UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
	424	; dw UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
	425	; dw UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
[150]	426	;
	427	; * = Enhanced Drive Access Support (minimum required EBIOS functions)
	428	; ** = Enhanced Disk Drive (EDD) Support
	429	; *** = Drive Locking and Ejecting Support
[181]	430	%endif

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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 502

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