source: xtideuniversalbios/tags/XTIDE_Universal_BIOS_v1.1.5/Src/Handlers/Int13h.asm@ 539

Last change on this file since 539 was 43, checked in by Tomi Tilli, 14 years ago

Errors are now being checked when calling previous INT 13h handler on AH=08h Read Disk Drive Parameters. This fixes infinite drive checking loop on unofficial MS-DOS 7.10 installer.
File size: 10.7 KB
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1; File name : Int13h_Jump.asm
2; Project name : IDE BIOS
3; Created date : 21.9.2007
4; Last update : 24.8.2010
5; Author : Tomi Tilli
6; Description : Int 13h BIOS functions (Floppy and Hard disk).
7
8; Section containing code
9SECTION .text
10
11;--------------------------------------------------------------------
12; Macro that prints drive and function number.
13; Used only for debugging.
14;
15; DEBUG_PRINT_DRIVE_AND_FUNCTION
16; Parameters:
17; AH: INT 13h function number
18; DL: Drive number
19; Returns:
20; Nothing
21; Corrupts registers:
22; Nothing
23;--------------------------------------------------------------------
24%macro DEBUG_PRINT_DRIVE_AND_FUNCTION 0
25 push dx
26 push ax
27 mov al, dl
28 call Print_IntHexW
29 pop ax
30 pop dx
31%endmacro
32
33
34;--------------------------------------------------------------------
35; Int 13h software interrupt handler.
36; Jumps to specific function defined in AH.
37;
38; Int13h_Jump
39; Parameters:
40; AH: Bios function
41; DL: Drive number
42; Returns:
43; Depends on function
44; Corrupts registers:
45; Flags
46;--------------------------------------------------------------------
47ALIGN JUMP_ALIGN
48Int13h_DiskFunctions:
49 ; Save registers
50 sti ; Enable interrupts
51 push ds ; Store DS
52 push di ; Store DI
53
54 ;DEBUG_PRINT_DRIVE_AND_FUNCTION
55 call RamVars_GetSegmentToDS
56 call DriveXlate_WhenEnteringInt13h
57 call RamVars_IsFunctionHandledByThisBIOS
58 jnc SHORT Int13h_DirectCallToAnotherBios
59 ;DEBUG_PRINT_DRIVE_AND_FUNCTION
60
61 ; Jump to correct BIOS function
62 cmp ah, 25h ; Valid BIOS function?
63 ja SHORT Int13h_UnsupportedFunction
64 mov di, ax
65 eSHR_IM di, 7 ; Shift function to DI...
66 and di, BYTE 7Eh ; ...and prepare for word lookup
67 jmp [cs:di+g_rgw13hFuncJump] ; Jump to BIOS function
68
69
70;--------------------------------------------------------------------
71; Directs call to another INT13h function whose pointer is
72; stored to RAMVARS.
73;
74; Int13h_DirectCallToAnotherBios
75; Parameters:
76; AH: Bios function
77; DL: Drive number
78; DS: RAMVARS segment
79; DI: Corrupted
80; Stack from top to down:
81; Original DI
82; Original DS
83; Returns:
84; Depends on function
85; Corrupts registers:
86; Flags
87;--------------------------------------------------------------------
88ALIGN JUMP_ALIGN
89Int13h_UnsupportedFunction:
90Int13h_DirectCallToAnotherBios:
91 ; Temporarily store original DI and DS from stack to RAMVARS
92 pop WORD [RAMVARS.wI13hDI]
93 pop WORD [RAMVARS.wI13hDS]
94
95 ; Special return processing required if target function
96 ; returns something in DL
97 mov di, Int13h_ReturnFromAnotherBiosWithValueInDL
98 call DriveXlate_DoesFunctionReturnSomethingInDL
99 jc SHORT .PushIretAddress
100 add di, BYTE Int13h_ReturnFromAnotherBios - Int13h_ReturnFromAnotherBiosWithValueInDL
101.PushIretAddress:
102 pushf ; Push FLAGS to simulate INT
103 push cs ; Push return segment
104 push di ; Push return offset
105
106 ; "Return" to another INT 13h with original DI and DS
107 push WORD [RAMVARS.fpOldI13h+2] ; Segment
108 push WORD [RAMVARS.fpOldI13h] ; Offset
109 lds di, [RAMVARS.dwI13DIDS]
110 cli ; Disable interrupts as INT would
111 retf
112
113
114;--------------------------------------------------------------------
115; Int13h_CallPreviousInt13hHandler
116; Parameters:
117; AH: Bios function
118; DS: RAMVARS segment
119; Other: Depends on function to call
120; Returns:
121; Depends on function to call
122; Corrupts registers:
123; Nothing
124;--------------------------------------------------------------------
125ALIGN JUMP_ALIGN
126Int13h_CallPreviousInt13hHandler:
127 pushf ; Push flags to simulate INT
128 cli ; Disable interrupts since INT does that
129 call FAR [RAMVARS.fpOldI13h]
130 sti
131 ret
132
133
134;--------------------------------------------------------------------
135; Int13h_ReturnFromAnotherBiosWithValueInDL
136; Int13h_ReturnFromAnotherBios
137; Parameters:
138; AH: Error code
139; DL: Drive number (only on Int13h_ReturnFromAnotherBios)
140; CF: Error status
141; Returns:
142; Depends on function
143; Corrupts registers:
144; Nothing (not even FLAGS)
145;--------------------------------------------------------------------
146ALIGN JUMP_ALIGN
147Int13h_ReturnFromAnotherBiosWithValueInDL:
148 push ds
149 push di
150 pushf ; Store return flags
151 call RamVars_GetSegmentToDS
152 call DriveXlate_WhenLeavingInt13hWithReturnValueInDL
153 jmp SHORT Int13h_Leave
154
155ALIGN JUMP_ALIGN
156Int13h_ReturnFromAnotherBios:
157 push ds
158 push di
159 pushf ; Store return flags
160 call RamVars_GetSegmentToDS
161 call DriveXlate_WhenLeavingInt13h
162 jmp SHORT Int13h_Leave
163
164
165;--------------------------------------------------------------------
166; Returns from any BIOS function implemented by this BIOS.
167;
168; Int13h_ReturnWithValueInDL
169; Int13h_PopXRegsAndReturn
170; Int13h_PopDiDsAndReturn
171; Parameters:
172; DL: Drive number (not Int13h_ReturnWithoutSwappingDrives)
173; DS: RAMVARS segment
174; Returns:
175; Depends on function
176; Corrupts registers:
177; Nothing (not even FLAGS)
178;--------------------------------------------------------------------
179ALIGN JUMP_ALIGN
180Int13h_ReturnWithValueInDL:
181 pushf
182 call DriveXlate_WhenLeavingInt13hWithReturnValueInDL
183 jmp SHORT Int13h_LeaveAfterStoringErrorCodeToBDA
184
185ALIGN JUMP_ALIGN
186Int13h_PopXRegsAndReturn:
187 pop bx ; Pop old AX to BX
188 mov al, bl ; Restore AL
189 pop bx
190 pop cx
191 pop dx
192 ; Fall to Int13h_PopDiDsAndReturn
193
194ALIGN JUMP_ALIGN
195Int13h_PopDiDsAndReturn:
196 pushf
197 call DriveXlate_WhenLeavingInt13h
198 ; Fall to Int13h_LeaveAfterStoringErrorCodeToBDA
199
200Int13h_LeaveAfterStoringErrorCodeToBDA:
201 LOAD_BDA_SEGMENT_TO ds, di
202 mov [BDA.bHDStatus], ah
203 ; Fall to Int13h_Leave
204
205Int13h_Leave:
206 popf
207 pop di
208 pop ds
209 retf 2
210
211
212; Jump table for correct BIOS function
213ALIGN WORD_ALIGN
214g_rgw13hFuncJump:
215 dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
216 dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
217 dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
218 dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
219 dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
220 dw AH5h_HandlerForFormatDiskTrack ; 05h, Format Disk Track (XT, AT, EISA)
221 dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
222 dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
223 dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
224 dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
225 dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
226 dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
227 dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
228 dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
229 dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
230 dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
231 dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
232 dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
233 dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
234 dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
235 dw AH14h_HandlerForControllerInternalDiagnostic ; 14h, Controller Internal Diagnostic (All)
236 dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
237 dw Int13h_UnsupportedFunction ; 16h,
238 dw Int13h_UnsupportedFunction ; 17h,
239 dw Int13h_UnsupportedFunction ; 18h,
240 dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
241 dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
242 dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
243 dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
244 dw Int13h_UnsupportedFunction ; 1Dh,
245 dw Int13h_UnsupportedFunction ; 1Eh,
246 dw Int13h_UnsupportedFunction ; 1Fh,
247 dw Int13h_UnsupportedFunction ; 20h,
248 dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
249 dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
250 dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
251 dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
252 dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
253; dw Int13h_UnsupportedFunction ; 26h,
254; dw Int13h_UnsupportedFunction ; 27h,
255; dw Int13h_UnsupportedFunction ; 28h,
256; dw Int13h_UnsupportedFunction ; 29h,
257; dw Int13h_UnsupportedFunction ; 2Ah,
258; dw Int13h_UnsupportedFunction ; 2Bh,
259; dw Int13h_UnsupportedFunction ; 2Ch,
260; dw Int13h_UnsupportedFunction ; 2Dh,
261; dw Int13h_UnsupportedFunction ; 2Eh,
262; dw Int13h_UnsupportedFunction ; 2Fh,
263; dw Int13h_UnsupportedFunction ; 30h,
264; dw Int13h_UnsupportedFunction ; 31h,
265; dw Int13h_UnsupportedFunction ; 32h,
266; dw Int13h_UnsupportedFunction ; 33h,
267; dw Int13h_UnsupportedFunction ; 34h,
268; dw Int13h_UnsupportedFunction ; 35h,
269; dw Int13h_UnsupportedFunction ; 36h,
270; dw Int13h_UnsupportedFunction ; 37h,
271; dw Int13h_UnsupportedFunction ; 38h,
272; dw Int13h_UnsupportedFunction ; 39h,
273; dw Int13h_UnsupportedFunction ; 3Ah,
274; dw Int13h_UnsupportedFunction ; 3Bh,
275; dw Int13h_UnsupportedFunction ; 3Ch,
276; dw Int13h_UnsupportedFunction ; 3Dh,
277; dw Int13h_UnsupportedFunction ; 3Eh,
278; dw Int13h_UnsupportedFunction ; 3Fh,
279; dw Int13h_UnsupportedFunction ; 40h,
280; dw Int13h_UnsupportedFunction ; 41h, Check if Extensions Present (EBIOS)
281; dw Int13h_UnsupportedFunction ; 42h, Extended Read Sectors (EBIOS)
282; dw Int13h_UnsupportedFunction ; 43h, Extended Write Sectors (EBIOS)
283; dw Int13h_UnsupportedFunction ; 44h, Extended Verify Sectors (EBIOS)
284; dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)
285; dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)
286; dw Int13h_UnsupportedFunction ; 47h, Extended Seek (EBIOS)
287; dw Int13h_UnsupportedFunction ; 48h, Get Extended Drive Parameters (EBIOS)
288; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)
289; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
290; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
291; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
292; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
293; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)
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