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 | endstruc |
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30 | |
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31 | ; Bit defines for ROMVARS.wFlags |
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32 | FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.) |
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33 | FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation |
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34 | |
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35 | ; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes) |
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36 | DEFAULT_TEXT_MODE EQU 4 |
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37 | |
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38 | |
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39 | ; Controller specific variables |
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40 | struc IDEVARS |
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41 | .wPort resb 2 ; IDE Base Port for Command Block (usual) Registers |
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42 | .wPortCtrl resb 2 ; IDE Base Port for Control Block Registers |
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43 | .bDevice resb 1 ; Device type |
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44 | .bIRQ resb 1 ; Interrupt Request Number |
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45 | .drvParamsMaster resb DRVPARAMS_size |
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46 | .drvParamsSlave resb DRVPARAMS_size |
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47 | endstruc |
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48 | |
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49 | ; Device types for IDEVARS.bDeviceType |
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50 | DEVICE_8BIT_DUAL_PORT_XTIDE EQU (0<<1) |
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51 | DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0 EQU (1<<1) |
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52 | DEVICE_8BIT_SINGLE_PORT EQU (2<<1) |
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53 | DEVICE_16BIT_ATA EQU (3<<1) |
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54 | DEVICE_32BIT_ATA EQU (4<<1) |
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55 | DEVICE_SERIAL_PORT EQU (5<<1) |
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56 | |
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57 | |
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58 | ; Master/Slave drive specific parameters |
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59 | struc DRVPARAMS |
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60 | .wFlags resb 2 ; Drive flags |
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61 | .wCylinders resb 2 ; User specified cylinders (1...16383) |
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62 | .wHeadsAndSectors: |
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63 | .bHeads resb 1 ; User specified Heads (1...16) |
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64 | .bSect resb 1 ; User specified Sectors per track (1...63) |
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65 | endstruc |
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66 | |
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67 | ; Bit defines for DRVPARAMS.wFlags |
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68 | FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values |
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69 | FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers |
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70 | |
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71 | |
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72 | %endif ; ROMVARS_INC |
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