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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm @ 155

Last change on this file since 155 was 155, checked in by aitotat, 13 years ago

Changes to XTIDE Universal BIOS:

AH=4h again uses VERIFY command (copy-pasting had changed it to WRITE).
Timeout should now work on all overflow situations.
Cleaned code a bit.

File size: 11.1 KB

Rev	Line
[90]	1	; Project name : XTIDE Universal BIOS
[3]	2	; Description : Int 13h BIOS functions (Floppy and Hard disk).
	3
	4	; Section containing code
	5	SECTION .text
	6
	7	;--------------------------------------------------------------------
	8	; Int 13h software interrupt handler.
	9	; Jumps to specific function defined in AH.
	10	;
[148]	11	; Note to developers: Do not make recursive INT 13h calls!
	12	;
	13	; Int13h_DiskFunctionsHandler
[3]	14	; Parameters:
	15	; AH: Bios function
	16	; DL: Drive number
[148]	17	; Other: Depends on function
[3]	18	; Returns:
	19	; Depends on function
	20	;--------------------------------------------------------------------
	21	ALIGN JUMP_ALIGN
[148]	22	Int13h_DiskFunctionsHandler:
[3]	23	sti ; Enable interrupts
[150]	24	cld ; String instructions to increment pointers
[155]	25	CREATE_FRAME_INTPACK_TO_SSBP EXTRA_BYTES_FOR_INTPACK
[3]	26
	27	call RamVars_GetSegmentToDS
[148]	28	call DriveXlate_ToOrBack
	29	mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
[3]	30	call RamVars_IsFunctionHandledByThisBIOS
	31	jnc SHORT Int13h_DirectCallToAnotherBios
[148]	32	call FindDPT_ForDriveNumber ; DS:DI now points to DPT
[3]	33
	34	; Jump to correct BIOS function
	35	cmp ah, 25h ; Valid BIOS function?
	36	ja SHORT Int13h_UnsupportedFunction
[148]	37	eMOVZX bx, ah
	38	shl bx, 1
	39	jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
[3]	40
	41
	42	;--------------------------------------------------------------------
[148]	43	; Int13h_UnsupportedFunction
[3]	44	; Int13h_DirectCallToAnotherBios
	45	; Parameters:
[148]	46	; DL: Translated drive number
[3]	47	; DS: RAMVARS segment
[150]	48	; SS:BP: Ptr to IDEPACK
[148]	49	; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
	50	; Other: Function specific INT 13h parameters
[3]	51	; Returns:
	52	; Depends on function
	53	; Corrupts registers:
	54	; Flags
	55	;--------------------------------------------------------------------
	56	ALIGN JUMP_ALIGN
	57	Int13h_UnsupportedFunction:
	58	Int13h_DirectCallToAnotherBios:
[148]	59	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[150]	60	mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
	61	mov di, [bp+IDEPACK.intpack+INTPACK.di]
	62	mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
	63	push WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]	64	popf
	65	push bp
[150]	66	mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
[148]	67	int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
[3]	68
[148]	69	; Store returned values to INTPACK
	70	pop bp ; Standard INT 13h functions never uses BP as return register
	71	%ifdef USE_386
[150]	72	mov [bp+IDEPACK.intpack+INTPACK.gs], gs
	73	mov [bp+IDEPACK.intpack+INTPACK.fs], fs
[148]	74	%endif
[150]	75	mov [bp+IDEPACK.intpack+INTPACK.es], es
	76	mov [bp+IDEPACK.intpack+INTPACK.ds], ds
	77	mov [bp+IDEPACK.intpack+INTPACK.di], di
	78	mov [bp+IDEPACK.intpack+INTPACK.si], si
	79	mov [bp+IDEPACK.intpack+INTPACK.bx], bx
	80	mov [bp+IDEPACK.intpack+INTPACK.dh], dh
	81	mov [bp+IDEPACK.intpack+INTPACK.cx], cx
	82	mov [bp+IDEPACK.intpack+INTPACK.ax], ax
[148]	83	pushf
[150]	84	pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]	85	call RamVars_GetSegmentToDS
	86	cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
	87	je SHORT .ExchangeInt13hHandlers
[150]	88	mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
[148]	89	ALIGN JUMP_ALIGN
	90	.ExchangeInt13hHandlers:
	91	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	92	; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
[3]	93
	94
	95	;--------------------------------------------------------------------
[148]	96	; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
	97	; Int13h_ReturnFromHandlerWithoutStoringErrorCode
[32]	98	; Parameters:
[148]	99	; AH: BIOS Error code
[150]	100	; SS:BP: Ptr to IDEPACK
[32]	101	; Returns:
[148]	102	; All registers are loaded from INTPACK
[32]	103	;--------------------------------------------------------------------
	104	ALIGN JUMP_ALIGN
[148]	105	Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
[150]	106	call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
[148]	107	Int13h_ReturnFromHandlerWithoutStoringErrorCode:
[150]	108	or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
[148]	109	mov sp, bp ; Now we can exit anytime
[155]	110	RESTORE_FRAME_INTPACK_FROM_SSBP EXTRA_BYTES_FOR_INTPACK
[32]	111
	112
	113	;--------------------------------------------------------------------
[148]	114	; Int13h_CallPreviousInt13hHandler
[3]	115	; Parameters:
[148]	116	; AH: INT 13h function to call
	117	; DL: Drive number
	118	; DS: RAMVARS segment
[3]	119	; Returns:
	120	; Depends on function
	121	; Corrupts registers:
[148]	122	; BX, DI, ES
[3]	123	;--------------------------------------------------------------------
	124	ALIGN JUMP_ALIGN
[148]	125	Int13h_CallPreviousInt13hHandler:
[3]	126	push di
[148]	127	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	128	int BIOS_DISK_INTERRUPT_13h
	129	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	130	pop di
	131	ret
[35]	132
[3]	133
	134	;--------------------------------------------------------------------
[148]	135	; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[3]	136	; Parameters:
	137	; DS: RAMVARS segment
	138	; Returns:
[148]	139	; Nothing
[3]	140	; Corrupts registers:
[148]	141	; DI
[3]	142	;--------------------------------------------------------------------
	143	ALIGN JUMP_ALIGN
[148]	144	ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
	145	push es
	146	LOAD_BDA_SEGMENT_TO es, di
	147	mov di, [RAMVARS.fpOldI13h]
[150]	148	cli
[148]	149	xchg di, [es:BIOS_DISK_INTERRUPT_13h*4]
	150	mov [RAMVARS.fpOldI13h], di
	151	mov di, [RAMVARS.fpOldI13h+2]
	152	xchg di, [es:BIOS_DISK_INTERRUPT_13h*4+2]
	153	mov [RAMVARS.fpOldI13h+2], di
	154	pop es
[150]	155	sti
[148]	156	ret
[28]	157
[35]	158
[150]	159	;--------------------------------------------------------------------
	160	; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
	161	; Int13h_SetErrorCodeToIntpackInSSBPfromAH
	162	; Parameters:
	163	; AH: BIOS error code (00h = no error)
	164	; SS:BP: Ptr to IDEPACK
	165	; Returns:
	166	; SS:BP: Ptr to IDEPACK with error condition set
	167	; Corrupts registers:
	168	; DS, DI
	169	;--------------------------------------------------------------------
	170	ALIGN JUMP_ALIGN
	171	Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
	172	; Store error code to BDA
	173	LOAD_BDA_SEGMENT_TO ds, di
	174	mov [BDA.bHDLastSt], ah
[35]	175
[150]	176	; Store error code to INTPACK
	177	Int13h_SetErrorCodeToIntpackInSSBPfromAH:
	178	mov [bp+IDEPACK.intpack+INTPACK.ah], ah
	179	test ah, ah
	180	jnz SHORT .SetCFtoIntpack
	181	and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
	182	ret
	183	.SetCFtoIntpack:
	184	or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
	185	ret
	186
	187
	188
[3]	189	; Jump table for correct BIOS function
	190	ALIGN WORD_ALIGN
	191	g_rgw13hFuncJump:
	192	dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
	193	dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
	194	dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
	195	dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
	196	dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
[90]	197	dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
[3]	198	dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
	199	dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
	200	dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
	201	dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
	202	dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
	203	dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
	204	dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
	205	dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
	206	dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
	207	dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
	208	dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
	209	dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
	210	dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
	211	dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
[90]	212	dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
[3]	213	dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
	214	dw Int13h_UnsupportedFunction ; 16h,
	215	dw Int13h_UnsupportedFunction ; 17h,
	216	dw Int13h_UnsupportedFunction ; 18h,
	217	dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
	218	dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
	219	dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
	220	dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
	221	dw Int13h_UnsupportedFunction ; 1Dh,
	222	dw Int13h_UnsupportedFunction ; 1Eh,
	223	dw Int13h_UnsupportedFunction ; 1Fh,
	224	dw Int13h_UnsupportedFunction ; 20h,
	225	dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
	226	dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
	227	dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
	228	dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
	229	dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
	230	; dw Int13h_UnsupportedFunction ; 26h,
	231	; dw Int13h_UnsupportedFunction ; 27h,
	232	; dw Int13h_UnsupportedFunction ; 28h,
	233	; dw Int13h_UnsupportedFunction ; 29h,
	234	; dw Int13h_UnsupportedFunction ; 2Ah,
	235	; dw Int13h_UnsupportedFunction ; 2Bh,
	236	; dw Int13h_UnsupportedFunction ; 2Ch,
	237	; dw Int13h_UnsupportedFunction ; 2Dh,
	238	; dw Int13h_UnsupportedFunction ; 2Eh,
	239	; dw Int13h_UnsupportedFunction ; 2Fh,
	240	; dw Int13h_UnsupportedFunction ; 30h,
	241	; dw Int13h_UnsupportedFunction ; 31h,
	242	; dw Int13h_UnsupportedFunction ; 32h,
	243	; dw Int13h_UnsupportedFunction ; 33h,
	244	; dw Int13h_UnsupportedFunction ; 34h,
	245	; dw Int13h_UnsupportedFunction ; 35h,
	246	; dw Int13h_UnsupportedFunction ; 36h,
	247	; dw Int13h_UnsupportedFunction ; 37h,
	248	; dw Int13h_UnsupportedFunction ; 38h,
	249	; dw Int13h_UnsupportedFunction ; 39h,
	250	; dw Int13h_UnsupportedFunction ; 3Ah,
	251	; dw Int13h_UnsupportedFunction ; 3Bh,
	252	; dw Int13h_UnsupportedFunction ; 3Ch,
	253	; dw Int13h_UnsupportedFunction ; 3Dh,
	254	; dw Int13h_UnsupportedFunction ; 3Eh,
	255	; dw Int13h_UnsupportedFunction ; 3Fh,
	256	; dw Int13h_UnsupportedFunction ; 40h,
[150]	257	; dw Int13h_UnsupportedFunction ; 41h, Check if Extensions Present (EBIOS)*
	258	; dw Int13h_UnsupportedFunction ; 42h, Extended Read Sectors (EBIOS)*
	259	; dw Int13h_UnsupportedFunction ; 43h, Extended Write Sectors (EBIOS)*
	260	; dw Int13h_UnsupportedFunction ; 44h, Extended Verify Sectors (EBIOS)*
	261	; dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
	262	; dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
	263	; dw Int13h_UnsupportedFunction ; 47h, Extended Seek (EBIOS)*
	264	; dw Int13h_UnsupportedFunction ; 48h, Get Extended Drive Parameters (EBIOS)*
	265	; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
[3]	266	; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
	267	; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
	268	; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
	269	; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
[150]	270	; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
	271	;
	272	; * = Enhanced Drive Access Support (minimum required EBIOS functions)
	273	; ** = Enhanced Disk Drive (EDD) Support
	274	; *** = Drive Locking and Ejecting Support

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