source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 151

Last change on this file since 151 was 150, checked in by Tomi Tilli, 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
Line 
1; Project name : XTIDE Universal BIOS
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;
11; Note to developers: Do not make recursive INT 13h calls!
12;
13; Int13h_DiskFunctionsHandler
14; Parameters:
15; AH: Bios function
16; DL: Drive number
17; Other: Depends on function
18; Returns:
19; Depends on function
20;--------------------------------------------------------------------
21ALIGN JUMP_ALIGN
22Int13h_DiskFunctionsHandler:
23 sti ; Enable interrupts
24 cld ; String instructions to increment pointers
25 SAVE_AND_GET_INTPACK_WITH_EXTRA_WORDS_TO_SSBP EXTRA_WORDS_TO_RESERVE_FOR_INTPACK
26
27 call RamVars_GetSegmentToDS
28 call DriveXlate_ToOrBack
29 mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
30 call RamVars_IsFunctionHandledByThisBIOS
31 jnc SHORT Int13h_DirectCallToAnotherBios
32 call FindDPT_ForDriveNumber ; DS:DI now points to DPT
33
34 ; Jump to correct BIOS function
35JumpToBiosFunctionInAH:
36 cmp ah, 25h ; Valid BIOS function?
37 ja SHORT Int13h_UnsupportedFunction
38 eMOVZX bx, ah
39 shl bx, 1
40 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
41
42
43;--------------------------------------------------------------------
44; Int13h_UnsupportedFunction
45; Int13h_DirectCallToAnotherBios
46; Parameters:
47; DL: Translated drive number
48; DS: RAMVARS segment
49; SS:BP: Ptr to IDEPACK
50; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
51; Other: Function specific INT 13h parameters
52; Returns:
53; Depends on function
54; Corrupts registers:
55; Flags
56;--------------------------------------------------------------------
57ALIGN JUMP_ALIGN
58Int13h_UnsupportedFunction:
59Int13h_DirectCallToAnotherBios:
60 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
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]
65 popf
66 push bp
67 mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
68 int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
69
70 ; Store returned values to INTPACK
71 pop bp ; Standard INT 13h functions never uses BP as return register
72%ifdef USE_386
73 mov [bp+IDEPACK.intpack+INTPACK.gs], gs
74 mov [bp+IDEPACK.intpack+INTPACK.fs], fs
75%endif
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
84 pushf
85 pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
86 call RamVars_GetSegmentToDS
87 cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
88 je SHORT .ExchangeInt13hHandlers
89 mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
90ALIGN JUMP_ALIGN
91.ExchangeInt13hHandlers:
92 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
93 ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
94
95
96;--------------------------------------------------------------------
97; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
98; Int13h_ReturnFromHandlerWithoutStoringErrorCode
99; Parameters:
100; AH: BIOS Error code
101; SS:BP: Ptr to IDEPACK
102; Returns:
103; All registers are loaded from INTPACK
104;--------------------------------------------------------------------
105ALIGN JUMP_ALIGN
106Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
107 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
108Int13h_ReturnFromHandlerWithoutStoringErrorCode:
109 or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
110 mov sp, bp ; Now we can exit anytime
111 RESTORE_INTPACK_WITH_EXTRA_WORDS_FROM_SSBP EXTRA_WORDS_TO_RESERVE_FOR_INTPACK
112
113
114;--------------------------------------------------------------------
115; Int13h_CallPreviousInt13hHandler
116; Parameters:
117; AH: INT 13h function to call
118; DL: Drive number
119; DS: RAMVARS segment
120; Returns:
121; Depends on function
122; Corrupts registers:
123; BX, DI, ES
124;--------------------------------------------------------------------
125ALIGN JUMP_ALIGN
126Int13h_CallPreviousInt13hHandler:
127 push di
128 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
129 int BIOS_DISK_INTERRUPT_13h
130 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
131 pop di
132 ret
133
134
135;--------------------------------------------------------------------
136; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
137; Parameters:
138; DS: RAMVARS segment
139; Returns:
140; Nothing
141; Corrupts registers:
142; DI
143;--------------------------------------------------------------------
144ALIGN JUMP_ALIGN
145ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
146 push es
147 LOAD_BDA_SEGMENT_TO es, di
148 mov di, [RAMVARS.fpOldI13h]
149 cli
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
156 sti
157 ret
158
159
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;--------------------------------------------------------------------
171ALIGN JUMP_ALIGN
172Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
173 ; Store error code to BDA
174 LOAD_BDA_SEGMENT_TO ds, di
175 mov [BDA.bHDLastSt], ah
176
177 ; Store error code to INTPACK
178Int13h_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
190; Jump table for correct BIOS function
191ALIGN WORD_ALIGN
192g_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)
198 dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
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)
213 dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
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,
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)***
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)
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
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