1 | ; File name : RomVars.inc |
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2 | ; Project name : IDE BIOS |
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3 | ; Created date : 23.3.2010 |
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4 | ; Last update : 1.5.2010 |
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5 | ; Author : Tomi Tilli |
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6 | ; Description : Defines for ROMVARS struct containing variables stored |
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7 | ; in BIOS ROM. |
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8 | %ifndef ROMVARS_INC |
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9 | %define ROMVARS_INC |
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10 | |
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11 | ; ROM Variables. There are written to ROM image before flashing. |
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12 | struc ROMVARS |
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13 | .wRomSign resb 2 ; ROM Signature (AA55h) |
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14 | .bRomSize resb 1 ; ROM size in 512 byte blocks |
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15 | .rgbJump resb 5 ; First instruction to ROM init (jmp) |
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16 | ; Offset 8 (8h) starts here |
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17 | .rgbDate resb 8 ; BIOS build date string (mm/dd/yy) |
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18 | ; Offset 16 (10h) starts here |
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19 | .rgbSign resb 8 ; Signature for XTIDE Configurator Program |
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20 | .szTitle resb 31 ; BIOS title string |
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21 | .szVersion resb 25 ; BIOS version string |
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22 | ; Offset 80 (50h) starts here |
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23 | .wFlags resb 2 ; Word for ROM flags |
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24 | .bIdeCnt resb 1 ; Number of supported IDE controllers |
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25 | .bBootDrv resb 1 ; Boot Menu default drive |
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26 | .bBootMnuH resb 1 ; Boot Menu maximum height |
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27 | .bBootDelay resb 1 ; Boot Menu selection delay in seconds |
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28 | .bBootLdrType resb 1 ; Boot Loader type |
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29 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives |
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30 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM |
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31 | resb 7 |
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32 | ; Offset 96 (60h) starts here |
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33 | ; Last IDEVARS must not start after offset FFh. |
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34 | .ideVars0 resb IDEVARS_size |
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35 | .ideVars1 resb IDEVARS_size |
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36 | .ideVars2 resb IDEVARS_size |
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37 | .ideVars3 resb IDEVARS_size |
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38 | .ideVars4 resb IDEVARS_size |
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39 | endstruc |
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40 | |
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41 | ; Bit defines for ROMVARS.wFlags |
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42 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.) |
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43 | FLG_ROMVARS_LATE EQU (1<<1) ; Late initialization |
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44 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation |
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45 | FLG_ROMVARS_ROMBOOT EQU (1<<3) ; Include ROMBOOT to boot menu |
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46 | FLG_ROMVARS_DRVNFO EQU (1<<4) ; Display drive info on boot menu |
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47 | FLG_ROMVARS_MAXSIZE EQU (1<<5) ; Maximize size by sacrificing compatibility with some old BIOSes |
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48 | |
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49 | ; Bootloader types for ROMVARS.bBootLdrType |
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50 | BOOTLOADER_TYPE_MENU EQU (0<<1) ; Display boot menu on boot loader |
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51 | BOOTLOADER_TYPE_SIMPLE EQU (1<<1) ; Simple bootloader without menu |
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52 | BOOTLOADER_TYPE_NONE EQU (3<<1) ; Do not install boot loader |
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53 | |
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54 | |
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55 | ; Controller specific variables |
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56 | struc IDEVARS |
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57 | .wPort resb 2 ; IDE Base Port for Command Block (usual) Registers |
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58 | .wPortCtrl resb 2 ; IDE Base Port for Control Block Registers |
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59 | .bBusType resb 1 ; Bus type |
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60 | .bIRQ resb 1 ; Interrupt Request Number |
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61 | resb 4 ; Reserved |
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62 | .drvParamsMaster resb DRVPARAMS_size |
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63 | .drvParamsSlave resb DRVPARAMS_size |
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64 | endstruc |
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65 | |
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66 | ; Bus types for IDEVARS.bBusType |
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67 | BUS_TYPE_8_DUAL EQU (0<<1) ; XTIDE transfers with two 8-bit data ports |
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68 | BUS_TYPE_16 EQU (1<<1) ; Normal 16-bit AT-IDE transfers |
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69 | BUS_TYPE_32 EQU (2<<1) ; 32-bit VLB and PCI transfers |
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70 | BUS_TYPE_8_SINGLE EQU (3<<1) ; 8-bit transfers with single 8-bit data port |
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71 | |
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72 | |
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73 | ; Master/Slave drive specific parameters |
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74 | struc DRVPARAMS |
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75 | .wFlags resb 2 ; Drive flags |
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76 | resb 2 ; Reserved |
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77 | .wCylinders resb 2 ; User specified cylinders (1...16383) |
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78 | .wSectAndHeads: |
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79 | .bSect resb 1 ; User specified Sectors per track (1...63) |
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80 | .bHeads resb 1 ; User specified Heads (1...16) |
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81 | endstruc |
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82 | |
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83 | ; Bit defines for DRVPARAMS.wFlags |
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84 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values |
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85 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers |
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86 | |
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87 | |
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88 | %endif ; ROMVARS_INC |
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