| 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 | |
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| 28 | ; Possible base addresses. Note that all XT-CF IDE registers are SHL 1 compared |
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| 29 | ; to standard IDE registers. |
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| 30 | XTCF_BASE_PORT_1 EQU 200h |
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| 31 | XTCF_BASE_PORT_2 EQU 240h |
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| 32 | XTCF_BASE_PORT_3 EQU 300h ; Default setting |
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| 33 | XTCF_BASE_PORT_4 EQU 340h |
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| 34 | |
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| 35 | |
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| 36 | ; XT-CF Control Register (do not SHL 1 these!) |
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| 37 | XTCF_CONTROL_REGISTER EQU 1Fh |
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| 38 | XTCT_CONTROL_REGISTER_INVERTED_in EQU 1Eh |
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| 39 | |
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| 40 | ; Control Register contents: |
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| 41 | ; |
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| 42 | ; Control Register holds high byte from Sector Window segment if >= A0h |
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| 43 | ; (First possible segment for Sector Window is A000h) |
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| 44 | ; |
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| 45 | ; 8-bit PIO transfers (port I/O) are used if Control Register is zero. |
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| 46 | ; Any other value means DMA transfers (using DMA channel 3). |
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| 47 | XTCF_8BIT_PIO_MODE EQU 0 |
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| 48 | XTCF_DMA_MODE EQU 10h |
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| 49 | XTCF_MEMORY_MAPPED_MODE EQU 0A0h |
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| 50 | RAISE_DRQ_AND_CLEAR_XTCF_XFER_COUNTER EQU 40h |
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| 51 | |
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| 52 | |
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| 53 | |
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| 54 | ; Subcommands for AH=1Eh, Lo-tech XT-CF features. |
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| 55 | ; Return values common for all subcommands: |
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| 56 | ; AH: RET_HD_SUCCESS if drive is XT-CF |
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| 57 | ; RET_HD_INVALID if drive is not XT-CF |
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| 58 | ; CF: 0 if successful, 1 if error |
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| 59 | |
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| 60 | ;-------------------------------------------------------------------- |
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| 61 | ; IS_THIS_DRIVE_XTCF |
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| 62 | ; Parameters: |
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| 63 | ; DL: Drive Number |
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| 64 | ;-------------------------------------------------------------------- |
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| 65 | IS_THIS_DRIVE_XTCF EQU 0 |
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| 66 | |
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| 67 | ;-------------------------------------------------------------------- |
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| 68 | ; READ_XTCF_CONTROL_REGISTER_TO_DH |
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| 69 | ; Parameters: |
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| 70 | ; DL: Drive Number |
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| 71 | ; Returns: |
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| 72 | ; DH: XT-CF Control Register contents |
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| 73 | ;-------------------------------------------------------------------- |
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| 74 | READ_XTCF_CONTROL_REGISTER_TO_DH EQU 1 |
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| 75 | |
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| 76 | ;-------------------------------------------------------------------- |
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| 77 | ; WRITE_DH_TO_XTCF_CONTROL_REGISTER |
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| 78 | ; Parameters: |
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| 79 | ; DH: Byte to write to XT-CF Control Register |
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| 80 | ; DL: Drive Number |
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| 81 | ;-------------------------------------------------------------------- |
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| 82 | WRITE_DH_TO_XTCF_CONTROL_REGISTER EQU 2 |
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| 83 | |
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| 84 | |
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| 85 | %endif ; XTCF_INC |
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