1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Lo-tech XT-CFv2 board specifications. |
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3 | ; |
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4 | ; More information at http://www.lo-tech.co.uk/wiki/Lo-tech_XT-CFv2_Board |
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5 | |
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6 | ; |
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7 | ; XTIDE Universal BIOS and Associated Tools |
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8 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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9 | ; |
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10 | ; This program is free software; you can redistribute it and/or modify |
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11 | ; it under the terms of the GNU General Public License as published by |
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12 | ; the Free Software Foundation; either version 2 of the License, or |
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13 | ; (at your option) any later version. |
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14 | ; |
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15 | ; This program is distributed in the hope that it will be useful, |
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16 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 | ; GNU General Public License for more details. |
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19 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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20 | ; |
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21 | |
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22 | %ifndef XTCF_INC |
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23 | %define XTCF_INC |
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24 | |
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25 | XTCF_DMA_MODE_MAX_BLOCK_SIZE EQU 64 ; Sectors |
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26 | OFFSET_TO_CONTROL_BLOCK_REGISTERS EQU 8 |
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27 | DEFAULT_XTCF_SECTOR_WINDOW_SEGMENT EQU 0D800h |
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28 | |
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29 | ; Possible base addresses. Note that all XT-CF IDE registers are SHL 1 compared |
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30 | ; to standard IDE registers. |
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31 | XTCF_BASE_PORT_1 EQU 200h |
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32 | XTCF_BASE_PORT_2 EQU 240h |
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33 | XTCF_BASE_PORT_3 EQU 300h ; Default setting |
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34 | XTCF_BASE_PORT_4 EQU 340h |
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35 | |
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36 | |
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37 | ; XT-CF Control Register (do not SHL 1 these!) |
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38 | XTCF_CONTROL_REGISTER EQU 1Fh |
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39 | XTCT_CONTROL_REGISTER_INVERTED_in EQU 1Eh |
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40 | |
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41 | ; Control Register contents: |
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42 | ; |
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43 | ; Control Register holds high byte from Sector Window segment if >= A0h |
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44 | ; (First possible segment for Sector Window is A000h) |
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45 | ; |
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46 | ; 8-bit PIO transfers (port I/O) are used if Control Register is zero. |
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47 | ; Any other value means DMA transfers (using DMA channel 3). |
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48 | XTCF_8BIT_PIO_MODE EQU 0 |
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49 | XTCF_DMA_MODE EQU 10h |
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50 | XTCF_MEMORY_MAPPED_MODE EQU 0A0h |
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51 | RAISE_DRQ_AND_CLEAR_XTCF_XFER_COUNTER EQU 40h |
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52 | |
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53 | |
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54 | |
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55 | ; Subcommands for AH=1Eh, Lo-tech XT-CF features. |
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56 | ; Return values common for all subcommands: |
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57 | ; AH: RET_HD_SUCCESS if drive is XT-CF |
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58 | ; RET_HD_INVALID if drive is not XT-CF |
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59 | ; CF: 0 if successful, 1 if error |
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60 | |
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61 | ;-------------------------------------------------------------------- |
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62 | ; IS_THIS_DRIVE_XTCF |
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63 | ; Parameters: |
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64 | ; DL: Drive Number |
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65 | ;-------------------------------------------------------------------- |
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66 | IS_THIS_DRIVE_XTCF EQU 0 |
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67 | |
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68 | ;-------------------------------------------------------------------- |
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69 | ; READ_XTCF_CONTROL_REGISTER_TO_DH |
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70 | ; Parameters: |
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71 | ; DL: Drive Number |
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72 | ; Returns: |
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73 | ; DH: XT-CF Control Register contents |
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74 | ;-------------------------------------------------------------------- |
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75 | READ_XTCF_CONTROL_REGISTER_TO_DH EQU 1 |
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76 | |
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77 | ;-------------------------------------------------------------------- |
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78 | ; WRITE_DH_TO_XTCF_CONTROL_REGISTER |
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79 | ; Parameters: |
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80 | ; DH: Byte to write to XT-CF Control Register |
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81 | ; DL: Drive Number |
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82 | ;-------------------------------------------------------------------- |
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83 | WRITE_DH_TO_XTCF_CONTROL_REGISTER EQU 2 |
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84 | |
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85 | |
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86 | %endif ; XTCF_INC |
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