1 | ; Project name : XTIDE Universal BIOS
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2 | ; Description : Defines for ROMVARS struct containing variables stored
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3 | ; in BIOS ROM.
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4 | %ifndef ROMVARS_INC
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5 | %define ROMVARS_INC
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6 |
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7 | ; ROM Variables. There are written to ROM image before flashing.
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8 | struc ROMVARS
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9 | .wRomSign resb 2 ; ROM Signature (AA55h)
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10 | .bRomSize resb 1 ; ROM size in 512 byte blocks
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11 | .rgbJump resb 3 ; First instruction to ROM init (jmp)
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12 |
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13 | .rgbSign resb 8 ; Signature for XTIDE Configurator Program
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14 | .szTitle resb 31 ; BIOS title string
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15 | .szVersion resb 25 ; BIOS version string
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16 |
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17 | .wFlags resb 2 ; Word for ROM flags
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18 | .wDisplayMode resb 2 ; Display mode for boot menu
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19 | .wBootTimeout resb 2 ; Boot Menu selection timeout in system timer ticks
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20 | .bIdeCnt resb 1 ; Number of available IDE controllers
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21 | .bBootDrv resb 1 ; Boot Menu default drive
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22 | .bMinFddCnt resb 1 ; Minimum number of Floppy Drives
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23 | .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM
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24 |
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25 | .ideVars0 resb IDEVARS_size
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26 | .ideVars1 resb IDEVARS_size
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27 | .ideVars2 resb IDEVARS_size
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28 | .ideVars3 resb IDEVARS_size
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29 |
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30 | %ifdef MODULE_SERIAL
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31 | .ideVarsSerialAuto resb IDEVARS_size
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32 | %endif
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33 | endstruc
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34 |
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35 | ; Bit defines for ROMVARS.wFlags
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36 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.)
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37 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation
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38 |
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39 | %ifdef MODULE_SERIAL
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40 | FLG_ROMVARS_MODULE_SERIAL EQU (1<<3)
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41 | %else
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42 | FLG_ROMVARS_MODULE_SERIAL EQU 0
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43 | %endif
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44 |
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45 | %ifdef MODULE_EBIOS
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46 | FLG_ROMVARS_MODULE_EBIOS EQU (1<<4)
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47 | %else
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48 | FLG_ROMVARS_MODULE_EBIOS EQU 0
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49 | %endif
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50 |
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51 | ; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes)
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52 | DEFAULT_TEXT_MODE EQU 4
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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 | .bDevice resb 1 ; Device type
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60 | .bIRQ resb 1 ; Interrupt Request Number
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61 | .drvParamsMaster resb DRVPARAMS_size
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62 | .drvParamsSlave resb DRVPARAMS_size
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63 | endstruc
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64 |
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65 | ; Device types for IDEVARS.bDevice
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66 | DEVICE_8BIT_DUAL_PORT_XTIDE EQU (0<<1)
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67 | DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0 EQU (1<<1)
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68 | DEVICE_8BIT_SINGLE_PORT EQU (2<<1)
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69 | DEVICE_16BIT_ATA EQU (3<<1)
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70 | DEVICE_32BIT_ATA EQU (4<<1)
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71 | DEVICE_SERIAL_PORT EQU (5<<1)
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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 | .wCylinders resb 2 ; User specified cylinders (1...16383)
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77 | .wHeadsAndSectors:
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78 | .bHeads resb 1 ; User specified Heads (1...16)
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79 | .bSect resb 1 ; User specified Sectors per track (1...63)
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80 | endstruc
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81 |
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82 | ; Bit defines for DRVPARAMS.wFlags
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83 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values
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84 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers
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85 |
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86 |
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87 | %endif ; ROMVARS_INC
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