| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Lo-tech XT-CFv2 board specifications.
|
|---|
| 3 | ;
|
|---|
| 4 | ; More information at http://www.lo-tech.co.uk/wiki/Lo-tech_XT-CFv2_Board
|
|---|
| 5 |
|
|---|
| 6 | ;
|
|---|
| 7 | ; XTIDE Universal BIOS and Associated Tools
|
|---|
| 8 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
|
|---|
| 9 | ;
|
|---|
| 10 | ; This program is free software; you can redistribute it and/or modify
|
|---|
| 11 | ; it under the terms of the GNU General Public License as published by
|
|---|
| 12 | ; the Free Software Foundation; either version 2 of the License, or
|
|---|
| 13 | ; (at your option) any later version.
|
|---|
| 14 | ;
|
|---|
| 15 | ; This program is distributed in the hope that it will be useful,
|
|---|
| 16 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 17 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 18 | ; GNU General Public License for more details.
|
|---|
| 19 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|---|
| 20 | ;
|
|---|
| 21 |
|
|---|
| 22 | %ifndef XTCF_INC
|
|---|
| 23 | %define XTCF_INC
|
|---|
| 24 |
|
|---|
| 25 | OFFSET_TO_CONTROL_BLOCK_REGISTERS EQU 8
|
|---|
| 26 | DEFAULT_XTCF_SECTOR_WINDOW_SEGMENT EQU 0D800h
|
|---|
| 27 |
|
|---|
| 28 | ; XT-CF requires that block must be less than 128 sectors (64 kiB).
|
|---|
| 29 | ; Instead of limiting block size to 64, we limit it to 32 (16 kiB).
|
|---|
| 30 | ; Transferring more than 16 kiB with 8237 DMA controller block or demand
|
|---|
| 31 | ; mode might interfere with DRAM refresh on XT systems.
|
|---|
| 32 | XTCF_DMA_MODE_MAX_BLOCK_SIZE EQU 32 ; Sectors
|
|---|
| 33 |
|
|---|
| 34 | ; Possible base addresses. Note that all XT-CF IDE registers are SHL 1 compared
|
|---|
| 35 | ; to standard IDE registers.
|
|---|
| 36 | XTCF_BASE_PORT_DETECTION_SEED EQU 140h ; Not a valid base address but needed for autodetection
|
|---|
| 37 | XTCF_BASE_PORT_1 EQU 200h
|
|---|
| 38 | XTCF_BASE_PORT_2 EQU 240h
|
|---|
| 39 | XTCF_BASE_PORT_3 EQU 300h ; Default setting
|
|---|
| 40 | XTCF_BASE_PORT_4 EQU 340h
|
|---|
| 41 |
|
|---|
| 42 |
|
|---|
| 43 | ; XT-CF Control Register (do not SHL 1 these!)
|
|---|
| 44 | XTCF_CONTROL_REGISTER EQU 1Fh
|
|---|
| 45 | XTCF_CONTROL_REGISTER_INVERTED_in EQU 1Eh
|
|---|
| 46 |
|
|---|
| 47 | ; Control Register contents:
|
|---|
| 48 | ;
|
|---|
| 49 | ; Control Register holds high byte from Sector Window segment if >= A0h
|
|---|
| 50 | ; (First possible segment for Sector Window is A000h)
|
|---|
| 51 | ;
|
|---|
| 52 | ; 8-bit PIO transfers (port I/O) are used if Control Register is zero.
|
|---|
| 53 | ; Any other value means DMA transfers (using DMA channel 3).
|
|---|
| 54 | XTCF_8BIT_PIO_MODE EQU 0
|
|---|
| 55 | XTCF_DMA_MODE EQU 10h
|
|---|
| 56 | XTCF_MEMORY_MAPPED_MODE EQU 0A0h
|
|---|
| 57 | RAISE_DRQ_AND_CLEAR_XTCF_XFER_COUNTER EQU 40h
|
|---|
| 58 |
|
|---|
| 59 |
|
|---|
| 60 |
|
|---|
| 61 | ; Subcommands for AH=1Eh, Lo-tech XT-CF features.
|
|---|
| 62 | ; Return values common for all subcommands:
|
|---|
| 63 | ; AH: RET_HD_SUCCESS if drive is XT-CF
|
|---|
| 64 | ; RET_HD_INVALID if drive is not XT-CF
|
|---|
| 65 | ; CF: 0 if successful, 1 if error
|
|---|
| 66 |
|
|---|
| 67 | ;--------------------------------------------------------------------
|
|---|
| 68 | ; IS_THIS_DRIVE_XTCF
|
|---|
| 69 | ; Parameters:
|
|---|
| 70 | ; DL: Drive Number
|
|---|
| 71 | ;--------------------------------------------------------------------
|
|---|
| 72 | IS_THIS_DRIVE_XTCF EQU 0
|
|---|
| 73 |
|
|---|
| 74 | ;--------------------------------------------------------------------
|
|---|
| 75 | ; READ_XTCF_CONTROL_REGISTER_TO_DH
|
|---|
| 76 | ; Parameters:
|
|---|
| 77 | ; DL: Drive Number
|
|---|
| 78 | ; Returns:
|
|---|
| 79 | ; DH: XT-CF Control Register contents
|
|---|
| 80 | ;--------------------------------------------------------------------
|
|---|
| 81 | READ_XTCF_CONTROL_REGISTER_TO_DH EQU 1
|
|---|
| 82 |
|
|---|
| 83 | ;--------------------------------------------------------------------
|
|---|
| 84 | ; WRITE_DH_TO_XTCF_CONTROL_REGISTER
|
|---|
| 85 | ; Parameters:
|
|---|
| 86 | ; DH: Byte to write to XT-CF Control Register
|
|---|
| 87 | ; DL: Drive Number
|
|---|
| 88 | ;--------------------------------------------------------------------
|
|---|
| 89 | WRITE_DH_TO_XTCF_CONTROL_REGISTER EQU 2
|
|---|
| 90 |
|
|---|
| 91 |
|
|---|
| 92 | %endif ; XTCF_INC
|
|---|
