source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 261

Last change on this file since 261 was 260, checked in by gregli@…, 13 years ago

Implemented function int13h/05h (floppy disk format track), that simply returns success, allowing emulated serial floppies to be formatted.
File size: 12.6 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 CREATE_FRAME_INTPACK_TO_SSBP EXTRA_BYTES_FOR_INTPACK
26
27 call RamVars_GetSegmentToDS
28 call DriveXlate_ToOrBack
29 mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
30 call RamVars_IsFunctionHandledByThisBIOS
31 jc SHORT Int13h_DirectCallToAnotherBios
32
33 call FindDPT_ForDriveNumber ; DS:DI now points to DPT
34
35 ; Jump to correct BIOS function
36 eMOVZX bx, ah
37 shl bx, 1
38 cmp ah, 25h ; Possible EBIOS function?
39%ifdef MODULE_EBIOS
40 ja SHORT .JumpToEbiosFunction
41%else
42 ja SHORT Int13h_UnsupportedFunction
43%endif
44 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
45
46%ifdef MODULE_EBIOS
47 ; Jump to correct EBIOS function
48ALIGN JUMP_ALIGN
49.JumpToEbiosFunction:
50 test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA
51 jz SHORT Int13h_UnsupportedFunction ; No eINT 13h for CHS drives
52 cmp ah, 48h
53 ja SHORT Int13h_UnsupportedFunction
54 sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table
55 jb SHORT Int13h_UnsupportedFunction
56 jmp [cs:bx+g_rgwEbiosFunctionJumpTable]
57%endif
58
59
60;--------------------------------------------------------------------
61; Int13h_UnsupportedFunction
62; Int13h_DirectCallToAnotherBios
63; Parameters:
64; DL: Translated drive number
65; DS: RAMVARS segment
66; SS:BP: Ptr to IDEPACK
67; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
68; Other: Function specific INT 13h parameters
69; Returns:
70; Depends on function
71; Corrupts registers:
72; Flags
73;--------------------------------------------------------------------
74ALIGN JUMP_ALIGN
75Int13h_UnsupportedFunction:
76Int13h_DirectCallToAnotherBios:
77 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
78 mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
79 mov di, [bp+IDEPACK.intpack+INTPACK.di]
80 mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
81 push WORD [bp+IDEPACK.intpack+INTPACK.flags]
82 popf
83 push bp
84 mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
85 int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
86
87 ; Store returned values to INTPACK
88 pop bp ; Standard INT 13h functions never uses BP as return register
89%ifdef USE_386
90 mov [bp+IDEPACK.intpack+INTPACK.gs], gs
91 mov [bp+IDEPACK.intpack+INTPACK.fs], fs
92%endif
93 mov [bp+IDEPACK.intpack+INTPACK.es], es
94 mov [bp+IDEPACK.intpack+INTPACK.ds], ds
95 mov [bp+IDEPACK.intpack+INTPACK.di], di
96 mov [bp+IDEPACK.intpack+INTPACK.si], si
97 mov [bp+IDEPACK.intpack+INTPACK.bx], bx
98 mov [bp+IDEPACK.intpack+INTPACK.dh], dh
99 mov [bp+IDEPACK.intpack+INTPACK.cx], cx
100 mov [bp+IDEPACK.intpack+INTPACK.ax], ax
101 pushf
102 pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
103 call RamVars_GetSegmentToDS
104 cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
105 je SHORT .ExchangeInt13hHandlers
106 mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
107ALIGN JUMP_ALIGN
108.ExchangeInt13hHandlers:
109%ifdef USE_186
110 push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
111 jmp SHORT ExchangeCurrentInt13hHandlerWithOldInt13hHandler
112%else
113 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
114 jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
115%endif
116
117%ifdef MODULE_SERIAL_FLOPPY
118;--------------------------------------------------------------------
119; Int13h_ReturnSuccessForFloppy
120;
121; Some operations, such as format of a floppy disk track, should just
122; return success, while for hard disks it should be treated as unsupported.
123;--------------------------------------------------------------------
124ALIGN JUMP_ALIGN
125Int13h_ReturnSuccessForFloppy:
126 test dl, dl
127 js short Int13h_UnsupportedFunction
128 mov ah, 0
129 jmp short Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
130%endif
131
132;--------------------------------------------------------------------
133; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL
134; Parameters:
135; AH: BIOS Error code
136; CL: Number of sectors actually transferred
137; SS:BP: Ptr to IDEPACK
138; Returns:
139; All registers are loaded from INTPACK
140;--------------------------------------------------------------------
141ALIGN JUMP_ALIGN
142Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL:
143 mov [bp+IDEPACK.intpack+INTPACK.al], cl
144 ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
145
146;--------------------------------------------------------------------
147; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
148; Int13h_ReturnFromHandlerWithoutStoringErrorCode
149; Parameters:
150; AH: BIOS Error code
151; SS:BP: Ptr to IDEPACK
152; Returns:
153; All registers are loaded from INTPACK
154;--------------------------------------------------------------------
155ALIGN JUMP_ALIGN
156Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
157%ifdef MODULE_SERIAL_FLOPPY
158 mov al, [bp+IDEPACK.intpack+INTPACK.dl]
159Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH_ALHasDriveNumber:
160 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber
161%else
162 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
163%endif
164Int13h_ReturnFromHandlerWithoutStoringErrorCode:
165 or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
166 mov sp, bp ; Now we can exit anytime
167 RESTORE_FRAME_INTPACK_FROM_SSBP EXTRA_BYTES_FOR_INTPACK
168
169
170;--------------------------------------------------------------------
171; Int13h_CallPreviousInt13hHandler
172; Parameters:
173; AH: INT 13h function to call
174; DL: Drive number
175; DS: RAMVARS segment
176; Returns:
177; Depends on function
178; NOTE: ES:DI needs to be returned from the previous interrupt
179; handler, for floppy DPT in function 08h
180; Corrupts registers:
181; None
182;--------------------------------------------------------------------
183ALIGN JUMP_ALIGN
184Int13h_CallPreviousInt13hHandler:
185 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
186 int BIOS_DISK_INTERRUPT_13h
187;;; fall-through to ExchangeCurrentInt13hHandlerWithOldInt13hHandler
188
189;--------------------------------------------------------------------
190; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
191; Parameters:
192; DS: RAMVARS segment
193; Returns:
194; Nothing
195; Corrupts registers:
196; Nothing
197; Note: Flags are preserved
198;--------------------------------------------------------------------
199ALIGN JUMP_ALIGN
200ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
201 push es
202 push si
203 LOAD_BDA_SEGMENT_PRESERVE_FLAGS_TO es, si
204 mov si, [RAMVARS.fpOldI13h]
205 cli
206 xchg si, [es:BIOS_DISK_INTERRUPT_13h*4]
207 mov [RAMVARS.fpOldI13h], si
208 mov si, [RAMVARS.fpOldI13h+2]
209 xchg si, [es:BIOS_DISK_INTERRUPT_13h*4+2]
210 sti
211 mov [RAMVARS.fpOldI13h+2], si
212 pop si
213 pop es
214 ret
215
216
217;--------------------------------------------------------------------
218; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
219; Int13h_SetErrorCodeToIntpackInSSBPfromAH
220; Parameters:
221; AH: BIOS error code (00h = no error)
222; SS:BP: Ptr to IDEPACK
223; Returns:
224; SS:BP: Ptr to IDEPACK with error condition set
225; Corrupts registers:
226; DS, DI
227;--------------------------------------------------------------------
228ALIGN JUMP_ALIGN
229%ifdef MODULE_SERIAL_FLOPPY
230Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber:
231 ; Store error code to BDA
232 mov bx, BDA.bHDLastSt
233 test al, al
234 js .HardDisk
235 mov bl, BDA.bFDRetST & 0xff
236.HardDisk:
237 LOAD_BDA_SEGMENT_TO ds, di
238 mov [bx], ah
239%else
240Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
241 ; Store error code to BDA
242 LOAD_BDA_SEGMENT_TO ds, di
243 mov [BDA.bHDLastSt], ah
244%endif
245
246 ; Store error code to INTPACK
247Int13h_SetErrorCodeToIntpackInSSBPfromAH:
248 mov [bp+IDEPACK.intpack+INTPACK.ah], ah
249 test ah, ah
250 jnz SHORT .SetCFtoIntpack
251 and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
252 ret
253.SetCFtoIntpack:
254 or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
255 ret
256
257
258; Jump table for correct BIOS function
259ALIGN WORD_ALIGN
260g_rgw13hFuncJump:
261 dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
262 dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
263 dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
264 dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
265 dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
266%ifdef MODULE_SERIAL_FLOPPY
267 dw Int13h_ReturnSuccessForFloppy ; 05h, Format Disk Track (XT, AT, EISA)
268%else
269 dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
270%endif
271 dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
272 dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
273 dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
274 dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
275 dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
276 dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
277 dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
278 dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
279 dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
280 dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
281 dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
282 dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
283 dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
284 dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
285 dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
286 dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
287 dw Int13h_UnsupportedFunction ; 16h,
288 dw Int13h_UnsupportedFunction ; 17h,
289 dw Int13h_UnsupportedFunction ; 18h,
290 dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
291 dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
292 dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
293 dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
294 dw Int13h_UnsupportedFunction ; 1Dh,
295 dw Int13h_UnsupportedFunction ; 1Eh,
296 dw Int13h_UnsupportedFunction ; 1Fh,
297 dw Int13h_UnsupportedFunction ; 20h,
298 dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
299 dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
300 dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
301 dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
302 dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
303
304%ifdef MODULE_EBIOS
305g_rgwEbiosFunctionJumpTable:
306 dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
307 dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
308 dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
309 dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
310 dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
311 dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
312 dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
313 dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
314; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
315; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
316; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
317; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
318; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
319; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
320;
321; * = Enhanced Drive Access Support (minimum required EBIOS functions)
322; ** = Enhanced Disk Drive (EDD) Support
323; *** = Drive Locking and Ejecting Support
324%endif
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