source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm@ 261

Last change on this file since 261 was 258, checked in by gregli@…, 13 years ago

Added floppy drive emulation over the serial connection (MODULE_SERIAL_FLOPPY). Along the way, various optimizations were made to stay within the 8K ROM size target. Also, serial code now returns the number of sectors transferred.
File size: 7.3 KB
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1; Project name : XTIDE Universal BIOS
2; Description : Command and port direction functions for different device types.
3
4; Section containing code
5SECTION .text
6
7
8%macro TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE 1
9 test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
10 jnz SHORT %1
11%endmacro
12
13%macro CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE 1
14 eMOVZX bx, [di+DPT.bIdevarsOffset]
15 cmp BYTE [cs:bx+IDEVARS.bDevice], DEVICE_JRIDE_ISA
16 je SHORT %1
17%endmacro
18
19%macro CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF 2
20 cmp BYTE [cs:bp+IDEVARS.bDevice], %1
21 je SHORT %2
22%endmacro
23
24
25
26;--------------------------------------------------------------------
27; Device_FinalizeDPT
28; Parameters:
29; DS:DI: Ptr to Disk Parameter Table
30; ES:SI: Ptr to 512-byte ATA information read from the drive
31; CS:BP: Ptr to IDEVARS for the controller
32; Returns:
33; Nothing
34; Corrupts registers:
35; AX, BX, CX, DX
36;--------------------------------------------------------------------
37%ifdef MODULE_SERIAL
38Device_FinalizeDPT:
39 ; needs to check IDEVARS vs. checking the DPT as the serial bit in the DPT is set in the Finalize routine
40 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_SERIAL_PORT, .FinalizeDptForSerialPortDevice
41 jmp IdeDPT_Finalize
42.FinalizeDptForSerialPortDevice:
43 jmp SerialDPT_Finalize
44
45%else ; IDE or JR-IDE/ISA
46 Device_FinalizeDPT EQU IdeDPT_Finalize
47%endif
48
49
50;--------------------------------------------------------------------
51; Device_ResetMasterAndSlaveController
52; Parameters:
53; DS:DI: Ptr to DPT (in RAMVARS segment)
54; Returns:
55; AH: INT 13h Error Code
56; CF: Cleared if success, Set if error
57; Corrupts registers:
58; AL, BX, CX, DX
59;--------------------------------------------------------------------
60%ifdef MODULE_JRIDE
61 %ifdef MODULE_SERIAL ; IDE + JR-IDE/ISA + Serial
62 Device_ResetMasterAndSlaveController:
63 TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE ReturnSuccessForSerialPort
64 CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE .ResetJrIDE
65 jmp IdeCommand_ResetMasterAndSlaveController
66
67 %else ; IDE + JR-IDE/ISA
68 Device_ResetMasterAndSlaveController:
69 CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE .ResetJrIDE
70 jmp IdeCommand_ResetMasterAndSlaveController
71 %endif
72
73%elifdef MODULE_SERIAL ; IDE + Serial
74Device_ResetMasterAndSlaveController:
75 TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE ReturnSuccessForSerialPort
76 jmp IdeCommand_ResetMasterAndSlaveController
77
78%else ; IDE
79 Device_ResetMasterAndSlaveController EQU IdeCommand_ResetMasterAndSlaveController
80%endif
81
82%ifdef MODULE_JRIDE
83.ResetJrIDE:
84 jmp MemIdeCommand_ResetMasterAndSlaveController
85%endif
86
87
88;--------------------------------------------------------------------
89; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
90; Parameters:
91; BH: Drive Select byte for Drive and Head Select Register
92; DS: Segment to RAMVARS
93; ES:SI: Ptr to normalized buffer to receive 512-byte IDE Information
94; CS:BP: Ptr to IDEVARS
95; Returns:
96; AH: INT 13h Error Code
97; CF: Cleared if success, Set if error
98; Corrupts registers:
99; AL, BL, CX, DX, SI, DI, ES
100;--------------------------------------------------------------------
101%ifdef MODULE_JRIDE
102 %ifdef MODULE_SERIAL ; IDE + JR-IDE/ISA + Serial
103 Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
104 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_SERIAL_PORT, .IdentifyDriveFromSerialPort
105 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_JRIDE_ISA, .IdentifyDriveFromJrIde
106 jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
107
108 %else ; IDE + JR-IDE/ISA
109 Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
110 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_JRIDE_ISA, .IdentifyDriveFromJrIde
111 jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
112 %endif
113
114%elifdef MODULE_SERIAL ; IDE + Serial
115Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
116 CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF DEVICE_SERIAL_PORT, .IdentifyDriveFromSerialPort
117 jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
118
119%else ; IDE
120 Device_IdentifyToBufferInESSIwithDriveSelectByteInBH EQU IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
121%endif
122
123%ifdef MODULE_JRIDE
124.IdentifyDriveFromJrIde:
125 jmp MemIdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
126%endif
127
128%ifdef MODULE_SERIAL
129.IdentifyDriveFromSerialPort:
130 jmp SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
131%endif
132
133
134;--------------------------------------------------------------------
135; Device_OutputCommandWithParameters
136; Parameters:
137; BH: Default system timer ticks for timeout (can be ignored)
138; BL: IDE Status Register bit to poll after command
139; ES:SI: Ptr to normalized buffer (for data transfer commands)
140; DS:DI: Ptr to DPT (in RAMVARS segment)
141; SS:BP: Ptr to IDEPACK
142; Returns:
143; AH: INT 13h Error Code
144; CX: Number of successfully transferred sectors (for transfer commands)
145; CF: Cleared if success, Set if error
146; Corrupts registers:
147; AL, BX, (CX), DX, (ES:SI for data transfer commands)
148;--------------------------------------------------------------------
149%ifdef MODULE_JRIDE
150 %ifdef MODULE_SERIAL ; IDE + JR-IDE/ISA + Serial
151 Device_OutputCommandWithParameters:
152 TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE .OutputCommandToSerialPort
153 CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE .OutputCommandToJrIDE
154 jmp IdeCommand_OutputWithParameters
155
156 %else ; IDE + JR-IDE/ISA
157 Device_OutputCommandWithParameters:
158 CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE .OutputCommandToJrIDE
159 jmp IdeCommand_OutputWithParameters
160 %endif
161
162%elifdef MODULE_SERIAL ; IDE + Serial
163Device_OutputCommandWithParameters:
164 TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE .OutputCommandToSerialPort
165 jmp IdeCommand_OutputWithParameters
166
167%else ; IDE
168 Device_OutputCommandWithParameters EQU IdeCommand_OutputWithParameters
169%endif
170
171%ifdef MODULE_JRIDE
172ALIGN JUMP_ALIGN
173.OutputCommandToJrIDE:
174 jmp MemIdeCommand_OutputWithParameters
175%endif
176
177%ifdef MODULE_SERIAL
178ALIGN JUMP_ALIGN
179.OutputCommandToSerialPort:
180 jmp SerialCommand_OutputWithParameters
181%endif
182
183
184;--------------------------------------------------------------------
185; Device_SelectDrive
186; Parameters:
187; DS:DI: Ptr to DPT (in RAMVARS segment)
188; SS:BP: Ptr to IDEPACK
189; Returns:
190; AH: INT 13h Error Code
191; CF: Cleared if success, Set if error
192; Corrupts registers:
193; AL, BX, CX, DX
194;--------------------------------------------------------------------
195%ifdef MODULE_JRIDE
196 %ifdef MODULE_SERIAL ; IDE + JR-IDE/ISA + Serial
197 Device_SelectDrive:
198 TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE ReturnSuccessForSerialPort
199 CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE .SelectJrIdeDrive
200 jmp IdeCommand_SelectDrive
201
202 %else ; IDE + JR-IDE/ISA
203 Device_SelectDrive:
204 CMP_USING_DPT_AND_JUMP_IF_JRIDE_DEVICE .SelectJrIdeDrive
205 jmp IdeCommand_SelectDrive
206 %endif
207
208%elifdef MODULE_SERIAL ; IDE + Serial
209Device_SelectDrive:
210 TEST_USIGN_DPT_AND_JUMP_IF_SERIAL_DEVICE ReturnSuccessForSerialPort
211 jmp IdeCommand_SelectDrive
212
213%else ; IDE
214 Device_SelectDrive EQU IdeCommand_SelectDrive
215%endif
216
217%ifdef MODULE_JRIDE
218ALIGN JUMP_ALIGN
219.SelectJrIdeDrive:
220 jmp MemIdeCommand_SelectDrive
221%endif
222
223%ifdef MODULE_SERIAL
224ALIGN JUMP_ALIGN
225ReturnSuccessForSerialPort:
226 xor ax, ax
227 ret
228%endif
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