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Int13h.asm@ 465

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Last change on this file since 465 was 445, checked in by krille_n_@…, 12 years ago

Changes:

A speed optimization to the eSHL_IM macro for 386 and higher. This change breaks emulation in the sense that the macro will fail when given a memory operand as the first parameter.
Memory_SumCXbytesFromESSItoAL now returns with the zero flag set/cleared according to the result.
Unrolled all the 8 bit READ transfer loops to do 16 bytes per iteration. Added a new macro (UNROLL_SECTORS_IN_CX_TO_OWORDS) as part of it. Size wise this is expensive but I think it should be worth the ROM space. The WRITE transfer loops were left as is since writes are rare anyway (<10% of all disk I/O IIRC).
Minor optimizations and fixes here and there.

File size: 15.4 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
[395]	95	%ifdef MODULE_HOTKEYS
[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
[414]	181	%ifdef MODULE_HOTKEYS
[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
	192	%ifdef MODULE_HOTKEYS
	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,
	397	dw UnsupportedFunction ; 1Eh,
	398	dw UnsupportedFunction ; 1Fh,
	399	dw UnsupportedFunction ; 20h,
	400	dw UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
	401	dw UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
	402	dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
	403	dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
	404	dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
[165]	405
[176]	406	%ifdef MODULE_EBIOS
[165]	407	g_rgwEbiosFunctionJumpTable:
[417]	408	dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
	409	dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
	410	dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
	411	dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
	412	dw UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
	413	dw UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
	414	dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
	415	dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
	416	; dw UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
	417	; dw UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
	418	; dw UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
	419	; dw UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
	420	; dw UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
	421	; dw UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
[150]	422	;
	423	; * = Enhanced Drive Access Support (minimum required EBIOS functions)
	424	; ** = Enhanced Disk Drive (EDD) Support
	425	; *** = Drive Locking and Ejecting Support
[181]	426	%endif

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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 465

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