source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 240

Last change on this file since 240 was 227, checked in by aitotat@…, 13 years ago

Changes to XTIDE Universal BIOS:

  • EBIOS functions now work in lite mode.
File size: 10.5 KB
RevLine 
[90]1; Project name : XTIDE Universal BIOS
[3]2; Description : Int 13h BIOS functions (Floppy and Hard disk).
3
4; Section containing code
5SECTION .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;--------------------------------------------------------------------
21ALIGN JUMP_ALIGN
[148]22Int13h_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
[148]35 eMOVZX bx, ah
36 shl bx, 1
[165]37 cmp ah, 25h ; Possible EBIOS function?
[176]38%ifdef MODULE_EBIOS
[165]39 ja SHORT .JumpToEbiosFunction
[176]40%else
41 ja SHORT Int13h_UnsupportedFunction
42%endif
[148]43 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
[3]44
[176]45%ifdef MODULE_EBIOS
[165]46 ; Jump to correct EBIOS function
47ALIGN JUMP_ALIGN
48.JumpToEbiosFunction:
[167]49 test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA
50 jz SHORT Int13h_UnsupportedFunction ; No eINT 13h for CHS drives
51 cmp ah, 48h
[165]52 ja SHORT Int13h_UnsupportedFunction
[181]53 sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table
54 jb SHORT Int13h_UnsupportedFunction
[165]55 jmp [cs:bx+g_rgwEbiosFunctionJumpTable]
[176]56%endif
[3]57
58;--------------------------------------------------------------------
[148]59; Int13h_UnsupportedFunction
[3]60; Int13h_DirectCallToAnotherBios
61; Parameters:
[148]62; DL: Translated drive number
[3]63; DS: RAMVARS segment
[150]64; SS:BP: Ptr to IDEPACK
[148]65; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
[161]66; Other: Function specific INT 13h parameters
[3]67; Returns:
68; Depends on function
69; Corrupts registers:
70; Flags
71;--------------------------------------------------------------------
72ALIGN JUMP_ALIGN
73Int13h_UnsupportedFunction:
74Int13h_DirectCallToAnotherBios:
[148]75 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[150]76 mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
77 mov di, [bp+IDEPACK.intpack+INTPACK.di]
78 mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
79 push WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]80 popf
81 push bp
[150]82 mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
[148]83 int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
[3]84
[148]85 ; Store returned values to INTPACK
86 pop bp ; Standard INT 13h functions never uses BP as return register
87%ifdef USE_386
[150]88 mov [bp+IDEPACK.intpack+INTPACK.gs], gs
89 mov [bp+IDEPACK.intpack+INTPACK.fs], fs
[148]90%endif
[150]91 mov [bp+IDEPACK.intpack+INTPACK.es], es
92 mov [bp+IDEPACK.intpack+INTPACK.ds], ds
93 mov [bp+IDEPACK.intpack+INTPACK.di], di
94 mov [bp+IDEPACK.intpack+INTPACK.si], si
95 mov [bp+IDEPACK.intpack+INTPACK.bx], bx
96 mov [bp+IDEPACK.intpack+INTPACK.dh], dh
97 mov [bp+IDEPACK.intpack+INTPACK.cx], cx
98 mov [bp+IDEPACK.intpack+INTPACK.ax], ax
[148]99 pushf
[150]100 pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]101 call RamVars_GetSegmentToDS
102 cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
103 je SHORT .ExchangeInt13hHandlers
[150]104 mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
[148]105ALIGN JUMP_ALIGN
106.ExchangeInt13hHandlers:
107 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
108 ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
[3]109
110
111;--------------------------------------------------------------------
[148]112; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
113; Int13h_ReturnFromHandlerWithoutStoringErrorCode
[32]114; Parameters:
[148]115; AH: BIOS Error code
[150]116; SS:BP: Ptr to IDEPACK
[32]117; Returns:
[148]118; All registers are loaded from INTPACK
[32]119;--------------------------------------------------------------------
120ALIGN JUMP_ALIGN
[148]121Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
[150]122 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
[148]123Int13h_ReturnFromHandlerWithoutStoringErrorCode:
[150]124 or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
[148]125 mov sp, bp ; Now we can exit anytime
[155]126 RESTORE_FRAME_INTPACK_FROM_SSBP EXTRA_BYTES_FOR_INTPACK
[32]127
128
129;--------------------------------------------------------------------
[148]130; Int13h_CallPreviousInt13hHandler
[3]131; Parameters:
[148]132; AH: INT 13h function to call
133; DL: Drive number
134; DS: RAMVARS segment
[3]135; Returns:
136; Depends on function
137; Corrupts registers:
[148]138; BX, DI, ES
[3]139;--------------------------------------------------------------------
140ALIGN JUMP_ALIGN
[148]141Int13h_CallPreviousInt13hHandler:
[3]142 push di
[148]143 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
144 int BIOS_DISK_INTERRUPT_13h
145 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
146 pop di
147 ret
[35]148
[3]149
150;--------------------------------------------------------------------
[148]151; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[3]152; Parameters:
153; DS: RAMVARS segment
154; Returns:
[148]155; Nothing
[3]156; Corrupts registers:
[148]157; DI
[3]158;--------------------------------------------------------------------
159ALIGN JUMP_ALIGN
[148]160ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
161 push es
162 LOAD_BDA_SEGMENT_TO es, di
163 mov di, [RAMVARS.fpOldI13h]
[150]164 cli
[148]165 xchg di, [es:BIOS_DISK_INTERRUPT_13h*4]
166 mov [RAMVARS.fpOldI13h], di
167 mov di, [RAMVARS.fpOldI13h+2]
168 xchg di, [es:BIOS_DISK_INTERRUPT_13h*4+2]
[181]169 sti
[148]170 mov [RAMVARS.fpOldI13h+2], di
171 pop es
172 ret
[28]173
[35]174
[150]175;--------------------------------------------------------------------
176; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
177; Int13h_SetErrorCodeToIntpackInSSBPfromAH
178; Parameters:
179; AH: BIOS error code (00h = no error)
180; SS:BP: Ptr to IDEPACK
181; Returns:
182; SS:BP: Ptr to IDEPACK with error condition set
183; Corrupts registers:
184; DS, DI
185;--------------------------------------------------------------------
186ALIGN JUMP_ALIGN
187Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
188 ; Store error code to BDA
189 LOAD_BDA_SEGMENT_TO ds, di
190 mov [BDA.bHDLastSt], ah
[35]191
[150]192 ; Store error code to INTPACK
193Int13h_SetErrorCodeToIntpackInSSBPfromAH:
194 mov [bp+IDEPACK.intpack+INTPACK.ah], ah
195 test ah, ah
196 jnz SHORT .SetCFtoIntpack
197 and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
198 ret
199.SetCFtoIntpack:
200 or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
201 ret
202
203
[3]204; Jump table for correct BIOS function
205ALIGN WORD_ALIGN
206g_rgw13hFuncJump:
207 dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
208 dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
209 dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
210 dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
211 dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
[90]212 dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
[3]213 dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
214 dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
215 dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
216 dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
217 dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
218 dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
219 dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
220 dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
221 dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
222 dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
223 dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
224 dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
225 dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
226 dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
[90]227 dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
[3]228 dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
[161]229 dw Int13h_UnsupportedFunction ; 16h,
230 dw Int13h_UnsupportedFunction ; 17h,
231 dw Int13h_UnsupportedFunction ; 18h,
[3]232 dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
233 dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
234 dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
235 dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
[161]236 dw Int13h_UnsupportedFunction ; 1Dh,
237 dw Int13h_UnsupportedFunction ; 1Eh,
238 dw Int13h_UnsupportedFunction ; 1Fh,
239 dw Int13h_UnsupportedFunction ; 20h,
[3]240 dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
241 dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
242 dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
243 dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
244 dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
[165]245
[176]246%ifdef MODULE_EBIOS
[165]247g_rgwEbiosFunctionJumpTable:
248 dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
249 dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
250 dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
251 dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
252 dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
253 dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
254 dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
255 dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
[150]256; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
[3]257; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
258; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
259; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
260; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
[150]261; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
262;
263; * = Enhanced Drive Access Support (minimum required EBIOS functions)
264; ** = Enhanced Disk Drive (EDD) Support
265; *** = Drive Locking and Ejecting Support
[181]266%endif
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