source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/Controllers/XTCF.inc @ 472

Last change on this file since 472 was 472, checked in by aitotat@…, 11 years ago

Changes to XTIDE Universal BIOS:

  • Implemented AH=1Eh, XT-CF Features.
File size: 2.6 KB
Line 
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; Possible base addresses. Note that all XT-CF IDE registers are SHL 1 compared
26; to standard IDE registers.
27XTCF_BASE_PORT_1                    EQU     200h
28XTCF_BASE_PORT_2                    EQU     240h
29XTCF_BASE_PORT_3                    EQU     300h    ; Default setting
30XTCF_BASE_PORT_4                    EQU     340h
31
32
33; XT-CF Control Register (do not SHL 1 these!)
34XTCF_CONTROL_REGISTER               EQU     1Fh
35XTCT_CONTROL_REGISTER_INVERTED_in   EQU     1Eh
36
37; Control Register contents:
38;
39; Control Register holds high byte from Sector Window segment if >= A0h
40; (First possible segment for Sector Window is A000h)
41;
42; 8-bit PIO transfers (port I/O) are used if Control Register is zero.
43; Any other value means DMA transfers (using DMA channel 3).
44
45
46; Subcommands for AH=1Eh, Lo-tech XT-CF features.
47; Return values common for all subcommands:
48;       AH:     RET_HD_SUCCESS if drive is XT-CF
49;               RET_HD_INVALID if drive is not XT-CF
50;       CF:     0 if successful, 1 if error
51
52;--------------------------------------------------------------------
53; IS_THIS_DRIVE_XTCF
54;   Parameters:
55;       DL:     Drive Number
56;--------------------------------------------------------------------
57IS_THIS_DRIVE_XTCF                  EQU     0
58
59;--------------------------------------------------------------------
60; READ_XTCF_CONTROL_REGISTER_TO_DH
61;   Parameters:
62;       DL:     Drive Number
63;   Returns:
64;       DH:     XT-CF Control Register contents
65;--------------------------------------------------------------------
66READ_XTCF_CONTROL_REGISTER_TO_DH    EQU     1
67
68;--------------------------------------------------------------------
69; WRITE_DH_TO_XTCF_CONTROL_REGISTER
70;   Parameters:
71;       DH:     Byte to write to XT-CF Control Register
72;       DL:     Drive Number
73;--------------------------------------------------------------------
74WRITE_DH_TO_XTCF_CONTROL_REGISTER   EQU     2
75
76
77%endif ; XTCF_INC
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