source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectDrives.asm@ 198

Last change on this file since 198 was 196, checked in by gregli@…, 13 years ago

Added printing of COM port and baud rate, when set explicitly by idecfg. Although it eats some bytes, I think it is worth it, since the BIOS will be looking for a server on a particular com port and baud rate, and it could be hard to troubleshoot a mismatch without this information. However, if we become space crunched, this change can be backed out.
File size: 4.6 KB
RevLine 
[150]1; Project name : XTIDE Universal BIOS
[3]2; Description : Functions for detecting drive for the BIOS.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; Detects all IDE hard disks to be controlled by this BIOS.
9;
10; DetectDrives_FromAllIDEControllers
11; Parameters:
12; DS: RAMVARS segment
13; ES: BDA segment (zero)
14; Returns:
15; Nothing
16; Corrupts registers:
17; All (not segments)
18;--------------------------------------------------------------------
19DetectDrives_FromAllIDEControllers:
[33]20 call RamVars_GetIdeControllerCountToCX
[3]21 mov bp, ROMVARS.ideVars0 ; CS:BP now points to first IDEVARS
22.DriveDetectLoop:
[196]23 mov si, g_szDetect
24%ifdef MODULE_SERIAL
25 cmp byte [cs:bp+IDEVARS.bDevice], DEVICE_SERIAL_PORT
26 jnz .DriveNotSerial
27 mov si, g_szDetectCOM
28.DriveNotSerial:
29%endif
[175]30 call .DetectDrives_WithIDEVARS ; Detect Master and Slave
[3]31 add bp, BYTE IDEVARS_size ; Point to next IDEVARS
32 loop .DriveDetectLoop
[175]33
34%ifdef MODULE_SERIAL
[179]35 test BYTE [es:BDA.bKBFlgs1], 8 ; alt key depressed
36 jz .done
37 mov bp, ROMVARS.ideVarsSerialAuto
[196]38 mov si, g_szDetectCOMAuto
[175]39;;; fall-through
40%else
[3]41 ret
[175]42%endif
[3]43
44;--------------------------------------------------------------------
45; Detects IDE hard disks by using information from IDEVARS.
46;
47; DetectDrives_WithIDEVARS
48; Parameters:
49; CS:BP: Ptr to IDEVARS
50; DS: RAMVARS segment
51; ES: Zero (BDA segment)
[189]52; SI: Ptr to template string
[3]53; Returns:
54; Nothing
55; Corrupts registers:
56; AX, BX, DX, SI, DI
57;--------------------------------------------------------------------
[175]58.DetectDrives_WithIDEVARS:
[3]59 push cx
[196]60
61 push si
[97]62 mov ax, g_szMaster
[150]63 mov bh, MASK_DRVNHEAD_SET ; Select Master drive
[98]64 call StartDetectionWithDriveSelectByteInBHandStringInAX ; Detect and create DPT + BOOTNFO
[189]65 pop si
[196]66
[97]67 mov ax, g_szSlave
[150]68 mov bh, MASK_DRVNHEAD_SET | FLG_DRVNHEAD_DRV
[98]69 call StartDetectionWithDriveSelectByteInBHandStringInAX
[3]70 pop cx
[175]71.done:
[3]72 ret
73
[175]74
[3]75;--------------------------------------------------------------------
[98]76; StartDetectionWithDriveSelectByteInBHandStringInAX
[3]77; Parameters:
[98]78; AX: Offset to "Master" or "Slave" string
[3]79; BH: Drive Select byte for Drive and Head Register
80; CS:BP: Ptr to IDEVARS for the drive
81; DS: RAMVARS segment
82; ES: Zero (BDA segment)
83; Returns:
[98]84; Nothing
[3]85; Corrupts registers:
[98]86; AX, BX, CX, DX, SI, DI
[3]87;--------------------------------------------------------------------
[98]88StartDetectionWithDriveSelectByteInBHandStringInAX:
89 call DetectPrint_StartDetectWithMasterOrSlaveStringInAXandIdeVarsInCSBP
[120]90 ; Fall to .ReadAtaInfoFromHardDisk
[3]91
92;--------------------------------------------------------------------
[120]93; .ReadAtaInfoFromHardDisk
[3]94; Parameters:
95; BH: Drive Select byte for Drive and Head Register
96; CS:BP: Ptr to IDEVARS for the drive
97; DS: RAMVARS segment
98; ES: Zero (BDA segment)
99; Returns:
100; CF: Cleared if ATA-information read successfully
101; Set if any error
102; Corrupts registers:
[150]103; AX, BL, CX, DX, SI, DI
[3]104;--------------------------------------------------------------------
[120]105.ReadAtaInfoFromHardDisk:
[150]106 mov si, BOOTVARS.rgbAtaInfo ; ES:SI now points to ATA info location
107 push es
108 push si
109 push bx
110 call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
111 pop bx
112 pop si
113 pop es
[120]114 jnc SHORT CreateBiosTablesForHardDisk
115 ; Fall to .ReadAtapiInfoFromDrive
[3]116
[120]117.ReadAtapiInfoFromDrive: ; Not yet implemented
118 ;call ReadAtapiInfoFromDrive ; Assume CD-ROM
119 ;jnc SHORT _CreateBiosTablesForCDROM
[196]120 jmp short DetectDrives_DriveNotFound
[3]121
[120]122
[3]123;--------------------------------------------------------------------
[98]124; CreateBiosTablesForHardDisk
[3]125; Parameters:
126; BH: Drive Select byte for Drive and Head Register
127; CS:BP: Ptr to IDEVARS for the drive
[150]128; ES:SI Ptr to ATA information for the drive
[3]129; DS: RAMVARS segment
[98]130; ES: BDA/Bootnfo segment
[3]131; Returns:
[98]132; Nothing
[3]133; Corrupts registers:
[98]134; AX, BX, CX, DX, SI, DI
[3]135;--------------------------------------------------------------------
[98]136CreateBiosTablesForHardDisk:
[3]137 call CreateDPT_FromAtaInformation
[196]138 jc SHORT DetectDrives_DriveNotFound
[3]139 call BootInfo_CreateForHardDisk
[196]140 jmp short DetectPrint_DriveNameFromBootnfoInESBX
141
142;--------------------------------------------------------------------
143; DetectDrives_DriveNotFound
144; Parameters:
145; Nothing
146; Returns:
147; Nothing
148; Corrupts registers:
149; AX, SI
150;--------------------------------------------------------------------
151DetectDrives_DriveNotFound:
152 mov si, g_szNotFound
153 jmp BootMenuPrint_NullTerminatedStringFromCSSIandSetCF
154
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