[392] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Functions for generating and accessing drive |
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| 3 | ; information to be displayed on boot menu. |
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| 4 | |
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| 5 | ; |
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[399] | 6 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[392] | 8 | ; |
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| 9 | ; This program is free software; you can redistribute it and/or modify |
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| 10 | ; it under the terms of the GNU General Public License as published by |
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| 11 | ; the Free Software Foundation; either version 2 of the License, or |
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| 12 | ; (at your option) any later version. |
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[399] | 13 | ; |
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[392] | 14 | ; This program is distributed in the hope that it will be useful, |
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | ; GNU General Public License for more details. |
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[399] | 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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[392] | 19 | ; |
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[399] | 20 | |
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[392] | 21 | ; Section containing code |
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| 22 | SECTION .text |
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| 23 | |
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| 24 | ;-------------------------------------------------------------------- |
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[397] | 25 | ; Creates new DRVDETECTINFO struct for detected hard disk. |
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[392] | 26 | ; |
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[397] | 27 | ; DriveDetectInfo_CreateForHardDisk |
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[392] | 28 | ; Parameters: |
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| 29 | ; DL: Drive number |
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| 30 | ; DS:DI: Ptr to Disk Parameter Table |
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| 31 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 32 | ; Returns: |
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[397] | 33 | ; ES:BX: Ptr to DRVDETECTINFO (if successful) |
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[392] | 34 | ; Corrupts registers: |
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| 35 | ; AX, BX, CX, DX, DI |
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| 36 | ;-------------------------------------------------------------------- |
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[397] | 37 | DriveDetectInfo_CreateForHardDisk: |
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| 38 | call DriveDetectInfo_ConvertDPTtoBX ; ES:BX now points to new DRVDETECTINFO |
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[392] | 39 | |
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| 40 | ; Store Drive Name |
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| 41 | push ds ; Preserve RAMVARS |
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| 42 | push si |
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| 43 | |
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| 44 | push es ; ES copied to DS |
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| 45 | pop ds |
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| 46 | |
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[399] | 47 | add si, BYTE ATA1.strModel ; DS:SI now points drive name (Clears CF) |
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| 48 | lea di, [bx+DRVDETECTINFO.szDrvName] ; ES:DI now points to name destination |
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[392] | 49 | mov cx, MAX_HARD_DISK_NAME_LENGTH / 2 ; Max number of WORDs allowed |
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| 50 | .CopyNextWord: |
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| 51 | lodsw |
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| 52 | xchg al, ah ; Change endianness |
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| 53 | stosw |
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| 54 | loop .CopyNextWord |
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[399] | 55 | xchg cx, ax ; Zero AX (CF already cleared from the ADD above) |
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[392] | 56 | stosw ; Terminate with NULL |
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| 57 | |
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| 58 | pop si |
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| 59 | pop ds |
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[399] | 60 | |
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[392] | 61 | ret |
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| 62 | |
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| 63 | |
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| 64 | ;-------------------------------------------------------------------- |
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[397] | 65 | ; Returns offset to DRVDETECTINFO based on DPT pointer. |
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[392] | 66 | ; |
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[397] | 67 | ; DriveDetectInfo_ConvertDPTtoBX |
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[392] | 68 | ; Parameters: |
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| 69 | ; DS:DI: DPT Pointer |
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| 70 | ; Returns: |
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[397] | 71 | ; BX: Offset to DRVDETECTINFO struct |
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[392] | 72 | ; Corrupts registers: |
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| 73 | ; AX |
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| 74 | ;-------------------------------------------------------------------- |
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[397] | 75 | DriveDetectInfo_ConvertDPTtoBX: |
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[399] | 76 | lea ax, [di-RAMVARS_size] ; subtract off base of DPTs |
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[397] | 77 | mov bl, DPT_DRVDETECTINFO_SIZE_MULTIPLIER ; DRVDETECTINFO are a whole number multiple of DPT size |
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[399] | 78 | mul bl |
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[397] | 79 | add ax, BOOTVARS.rgDrvDetectInfo ; add base of DRVDETECTINFO |
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[399] | 80 | xchg bx, ax |
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| 81 | ret |
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