Context Navigation

source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm @ 150

Last change on this file since 150 was 150, checked in by aitotat, 13 years ago

Changes to XTIDE Universal BIOS:

Redesigned Disk Parameter Tables.
Code generalizations for supporting non-IDE devices in the future.

File size: 11.2 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
	25	SAVE_AND_GET_INTPACK_WITH_EXTRA_WORDS_TO_SSBP EXTRA_WORDS_TO_RESERVE_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
[148]	35	JumpToBiosFunctionInAH:
[3]	36	cmp ah, 25h ; Valid BIOS function?
	37	ja SHORT Int13h_UnsupportedFunction
[148]	38	eMOVZX bx, ah
	39	shl bx, 1
	40	jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
[3]	41
	42
	43	;--------------------------------------------------------------------
[148]	44	; Int13h_UnsupportedFunction
[3]	45	; Int13h_DirectCallToAnotherBios
	46	; Parameters:
[148]	47	; DL: Translated drive number
[3]	48	; DS: RAMVARS segment
[150]	49	; SS:BP: Ptr to IDEPACK
[148]	50	; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
	51	; Other: Function specific INT 13h parameters
[3]	52	; Returns:
	53	; Depends on function
	54	; Corrupts registers:
	55	; Flags
	56	;--------------------------------------------------------------------
	57	ALIGN JUMP_ALIGN
	58	Int13h_UnsupportedFunction:
	59	Int13h_DirectCallToAnotherBios:
[148]	60	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[150]	61	mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
	62	mov di, [bp+IDEPACK.intpack+INTPACK.di]
	63	mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
	64	push WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]	65	popf
	66	push bp
[150]	67	mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
[148]	68	int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
[3]	69
[148]	70	; Store returned values to INTPACK
	71	pop bp ; Standard INT 13h functions never uses BP as return register
	72	%ifdef USE_386
[150]	73	mov [bp+IDEPACK.intpack+INTPACK.gs], gs
	74	mov [bp+IDEPACK.intpack+INTPACK.fs], fs
[148]	75	%endif
[150]	76	mov [bp+IDEPACK.intpack+INTPACK.es], es
	77	mov [bp+IDEPACK.intpack+INTPACK.ds], ds
	78	mov [bp+IDEPACK.intpack+INTPACK.di], di
	79	mov [bp+IDEPACK.intpack+INTPACK.si], si
	80	mov [bp+IDEPACK.intpack+INTPACK.bx], bx
	81	mov [bp+IDEPACK.intpack+INTPACK.dh], dh
	82	mov [bp+IDEPACK.intpack+INTPACK.cx], cx
	83	mov [bp+IDEPACK.intpack+INTPACK.ax], ax
[148]	84	pushf
[150]	85	pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]	86	call RamVars_GetSegmentToDS
	87	cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
	88	je SHORT .ExchangeInt13hHandlers
[150]	89	mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
[148]	90	ALIGN JUMP_ALIGN
	91	.ExchangeInt13hHandlers:
	92	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	93	; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
[3]	94
	95
	96	;--------------------------------------------------------------------
[148]	97	; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
	98	; Int13h_ReturnFromHandlerWithoutStoringErrorCode
[32]	99	; Parameters:
[148]	100	; AH: BIOS Error code
[150]	101	; SS:BP: Ptr to IDEPACK
[32]	102	; Returns:
[148]	103	; All registers are loaded from INTPACK
[32]	104	;--------------------------------------------------------------------
	105	ALIGN JUMP_ALIGN
[148]	106	Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
[150]	107	call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
[148]	108	Int13h_ReturnFromHandlerWithoutStoringErrorCode:
[150]	109	or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
[148]	110	mov sp, bp ; Now we can exit anytime
[150]	111	RESTORE_INTPACK_WITH_EXTRA_WORDS_FROM_SSBP EXTRA_WORDS_TO_RESERVE_FOR_INTPACK
[32]	112
	113
	114	;--------------------------------------------------------------------
[148]	115	; Int13h_CallPreviousInt13hHandler
[3]	116	; Parameters:
[148]	117	; AH: INT 13h function to call
	118	; DL: Drive number
	119	; DS: RAMVARS segment
[3]	120	; Returns:
	121	; Depends on function
	122	; Corrupts registers:
[148]	123	; BX, DI, ES
[3]	124	;--------------------------------------------------------------------
	125	ALIGN JUMP_ALIGN
[148]	126	Int13h_CallPreviousInt13hHandler:
[3]	127	push di
[148]	128	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	129	int BIOS_DISK_INTERRUPT_13h
	130	call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
	131	pop di
	132	ret
[35]	133
[3]	134
	135	;--------------------------------------------------------------------
[148]	136	; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[3]	137	; Parameters:
	138	; DS: RAMVARS segment
	139	; Returns:
[148]	140	; Nothing
[3]	141	; Corrupts registers:
[148]	142	; DI
[3]	143	;--------------------------------------------------------------------
	144	ALIGN JUMP_ALIGN
[148]	145	ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
	146	push es
	147	LOAD_BDA_SEGMENT_TO es, di
	148	mov di, [RAMVARS.fpOldI13h]
[150]	149	cli
[148]	150	xchg di, [es:BIOS_DISK_INTERRUPT_13h*4]
	151	mov [RAMVARS.fpOldI13h], di
	152	mov di, [RAMVARS.fpOldI13h+2]
	153	xchg di, [es:BIOS_DISK_INTERRUPT_13h*4+2]
	154	mov [RAMVARS.fpOldI13h+2], di
	155	pop es
[150]	156	sti
[148]	157	ret
[28]	158
[35]	159
[150]	160	;--------------------------------------------------------------------
	161	; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
	162	; Int13h_SetErrorCodeToIntpackInSSBPfromAH
	163	; Parameters:
	164	; AH: BIOS error code (00h = no error)
	165	; SS:BP: Ptr to IDEPACK
	166	; Returns:
	167	; SS:BP: Ptr to IDEPACK with error condition set
	168	; Corrupts registers:
	169	; DS, DI
	170	;--------------------------------------------------------------------
	171	ALIGN JUMP_ALIGN
	172	Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
	173	; Store error code to BDA
	174	LOAD_BDA_SEGMENT_TO ds, di
	175	mov [BDA.bHDLastSt], ah
[35]	176
[150]	177	; Store error code to INTPACK
	178	Int13h_SetErrorCodeToIntpackInSSBPfromAH:
	179	mov [bp+IDEPACK.intpack+INTPACK.ah], ah
	180	test ah, ah
	181	jnz SHORT .SetCFtoIntpack
	182	and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
	183	ret
	184	.SetCFtoIntpack:
	185	or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
	186	ret
	187
	188
	189
[3]	190	; Jump table for correct BIOS function
	191	ALIGN WORD_ALIGN
	192	g_rgw13hFuncJump:
	193	dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
	194	dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
	195	dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
	196	dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
	197	dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
[90]	198	dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
[3]	199	dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
	200	dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
	201	dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
	202	dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
	203	dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
	204	dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
	205	dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
	206	dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
	207	dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
	208	dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
	209	dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
	210	dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
	211	dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
	212	dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
[90]	213	dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
[3]	214	dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
	215	dw Int13h_UnsupportedFunction ; 16h,
	216	dw Int13h_UnsupportedFunction ; 17h,
	217	dw Int13h_UnsupportedFunction ; 18h,
	218	dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
	219	dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
	220	dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
	221	dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
	222	dw Int13h_UnsupportedFunction ; 1Dh,
	223	dw Int13h_UnsupportedFunction ; 1Eh,
	224	dw Int13h_UnsupportedFunction ; 1Fh,
	225	dw Int13h_UnsupportedFunction ; 20h,
	226	dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
	227	dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
	228	dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
	229	dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
	230	dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
	231	; dw Int13h_UnsupportedFunction ; 26h,
	232	; dw Int13h_UnsupportedFunction ; 27h,
	233	; dw Int13h_UnsupportedFunction ; 28h,
	234	; dw Int13h_UnsupportedFunction ; 29h,
	235	; dw Int13h_UnsupportedFunction ; 2Ah,
	236	; dw Int13h_UnsupportedFunction ; 2Bh,
	237	; dw Int13h_UnsupportedFunction ; 2Ch,
	238	; dw Int13h_UnsupportedFunction ; 2Dh,
	239	; dw Int13h_UnsupportedFunction ; 2Eh,
	240	; dw Int13h_UnsupportedFunction ; 2Fh,
	241	; dw Int13h_UnsupportedFunction ; 30h,
	242	; dw Int13h_UnsupportedFunction ; 31h,
	243	; dw Int13h_UnsupportedFunction ; 32h,
	244	; dw Int13h_UnsupportedFunction ; 33h,
	245	; dw Int13h_UnsupportedFunction ; 34h,
	246	; dw Int13h_UnsupportedFunction ; 35h,
	247	; dw Int13h_UnsupportedFunction ; 36h,
	248	; dw Int13h_UnsupportedFunction ; 37h,
	249	; dw Int13h_UnsupportedFunction ; 38h,
	250	; dw Int13h_UnsupportedFunction ; 39h,
	251	; dw Int13h_UnsupportedFunction ; 3Ah,
	252	; dw Int13h_UnsupportedFunction ; 3Bh,
	253	; dw Int13h_UnsupportedFunction ; 3Ch,
	254	; dw Int13h_UnsupportedFunction ; 3Dh,
	255	; dw Int13h_UnsupportedFunction ; 3Eh,
	256	; dw Int13h_UnsupportedFunction ; 3Fh,
	257	; dw Int13h_UnsupportedFunction ; 40h,
[150]	258	; dw Int13h_UnsupportedFunction ; 41h, Check if Extensions Present (EBIOS)*
	259	; dw Int13h_UnsupportedFunction ; 42h, Extended Read Sectors (EBIOS)*
	260	; dw Int13h_UnsupportedFunction ; 43h, Extended Write Sectors (EBIOS)*
	261	; dw Int13h_UnsupportedFunction ; 44h, Extended Verify Sectors (EBIOS)*
	262	; dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
	263	; dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
	264	; dw Int13h_UnsupportedFunction ; 47h, Extended Seek (EBIOS)*
	265	; dw Int13h_UnsupportedFunction ; 48h, Get Extended Drive Parameters (EBIOS)*
	266	; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
[3]	267	; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
	268	; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
	269	; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
	270	; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
[150]	271	; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
	272	;
	273	; * = Enhanced Drive Access Support (minimum required EBIOS functions)
	274	; ** = Enhanced Disk Drive (EDD) Support
	275	; *** = Drive Locking and Ejecting Support

Note: See TracBrowser for help on using the repository browser.

Download in other formats: