source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm@ 506

Last change on this file since 506 was 501, checked in by aitotat@…, 12 years ago

Changes to XTIDE Universal BIOS:

  • XTIDE rev 2 and modded XTIDE rev 1 work again (fixed A0<->A3 swap when accessing Control Block Registers).
  • System INT 13h handler is no longer copied to INT 40h (testing if something uses INT 40h).
  • Removed controller hardware reset: now AH=0h and AH=Dh will only re-initialize drives (SB16 Tertiary and Quaternary IDE should now be safe to use when using Secondary IDE).
File size: 4.7 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Command and port direction functions for different device types.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
7;
8; This program is free software; you can redistribute it and/or modify
9; it under the terms of the GNU General Public License as published by
10; the Free Software Foundation; either version 2 of the License, or
11; (at your option) any later version.
12;
13; This program is distributed in the hope that it will be useful,
14; but WITHOUT ANY WARRANTY; without even the implied warranty of
15; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16; GNU General Public License for more details.
17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
20; Section containing code
21SECTION .text
22
23
24%macro TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE 1
25 test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
26 jnz SHORT %1
27%endmacro
28
29%macro CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF 2
30 cmp BYTE [cs:bp+IDEVARS.bDevice], %1
31 je SHORT %2
32%endmacro
33
34
35
36;--------------------------------------------------------------------
37; Device_FinalizeDPT
38; Parameters:
39; DS:DI: Ptr to Disk Parameter Table
40; ES:SI: Ptr to 512-byte ATA information read from the drive
41; CS:BP: Ptr to IDEVARS for the controller
42; Returns:
43; Nothing
44; Corrupts registers:
45; AX, BX, CX, DX
46;--------------------------------------------------------------------
47%ifdef MODULE_SERIAL ; IDE + Serial
48Device_FinalizeDPT:
49 ; needs to check IDEVARS vs. checking the DPT as the serial bit in the DPT is set in the Finalize routine
50 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_SERIAL_PORT, .FinalizeDptForSerialPortDevice
51 jmp IdeDPT_Finalize
52.FinalizeDptForSerialPortDevice:
53 jmp SerialDPT_Finalize
54
55%else ; IDE
56 Device_FinalizeDPT EQU IdeDPT_Finalize
57%endif
58
59
60;--------------------------------------------------------------------
61; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
62; Parameters:
63; BH: Drive Select byte for Drive and Head Select Register
64; DX: Autodetected port (for devices that support autodetection)
65; DS: Segment to RAMVARS
66; ES:SI: Ptr to buffer to receive 512-byte IDE Information
67; CS:BP: Ptr to IDEVARS
68; Returns:
69; AH: INT 13h Error Code
70; CF: Cleared if success, Set if error
71; Corrupts registers:
72; AL, BX, CX, DX, SI, DI, ES
73;--------------------------------------------------------------------
74%ifdef MODULE_SERIAL ; IDE + Serial
75Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
76 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_SERIAL_PORT, .IdentifyDriveFromSerialPort
77 jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
78.IdentifyDriveFromSerialPort:
79 jmp SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
80
81%else ; IDE
82 Device_IdentifyToBufferInESSIwithDriveSelectByteInBH EQU IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
83%endif
84
85
86;--------------------------------------------------------------------
87; Device_OutputCommandWithParameters
88; Parameters:
89; BH: Default system timer ticks for timeout (can be ignored)
90; BL: IDE Status Register bit to poll after command
91; ES:SI: Ptr to buffer (for data transfer commands)
92; DS:DI: Ptr to DPT (in RAMVARS segment)
93; SS:BP: Ptr to IDEPACK
94; Returns:
95; AH: INT 13h Error Code
96; CX: Number of successfully transferred sectors (for transfer commands)
97; CF: Cleared if success, Set if error
98; Corrupts registers:
99; AL, BX, (CX), DX, (ES:SI for data transfer commands)
100;--------------------------------------------------------------------
101%ifdef MODULE_SERIAL ; IDE + Serial
102ALIGN JUMP_ALIGN
103Device_OutputCommandWithParameters:
104 TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE .OutputCommandToSerialPort
105 jmp IdeCommand_OutputWithParameters
106
107ALIGN JUMP_ALIGN
108.OutputCommandToSerialPort:
109 jmp SerialCommand_OutputWithParameters
110
111%else ; IDE
112 Device_OutputCommandWithParameters EQU IdeCommand_OutputWithParameters
113%endif
114
115
116;--------------------------------------------------------------------
117; Device_SelectDrive
118; Parameters:
119; DS:DI: Ptr to DPT (in RAMVARS segment)
120; SS:BP: Ptr to IDEPACK
121; Returns:
122; AH: INT 13h Error Code
123; CF: Cleared if success, Set if error
124; Corrupts registers:
125; AL, BX, CX, DX
126;--------------------------------------------------------------------
127%ifdef MODULE_SERIAL ; IDE + Serial
128Device_SelectDrive:
129 TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE ReturnSuccessForSerialPort
130 jmp IdeCommand_SelectDrive
131
132%else ; IDE
133 Device_SelectDrive EQU IdeCommand_SelectDrive
134%endif
135
136
137%ifdef MODULE_SERIAL
138ALIGN JUMP_ALIGN
139ReturnSuccessForSerialPort:
140 xor ax, ax
141 ret
142%endif
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