source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc @ 521

Last change on this file since 521 was 507, checked in by aitotat@…, 11 years ago

Changes to XTIDE Universal BIOS:

  • Reduced minimum time to display hotkeys. Now it is 2 seconds.
  • Brought back IDE controller reset.
  • Space savings by merging AH=Dh to AH=0h. AH=Dh is now redirected to AH=9h.
File size: 8.1 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Defines for ROMVARS struct containing variables stored
3;                   in BIOS ROM.
4
5;
6; XTIDE Universal BIOS and Associated Tools
7; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
8;
9; This program is free software; you can redistribute it and/or modify
10; it under the terms of the GNU General Public License as published by
11; the Free Software Foundation; either version 2 of the License, or
12; (at your option) any later version.
13;
14; This program is distributed in the hope that it will be useful,
15; but WITHOUT ANY WARRANTY; without even the implied warranty of
16; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17; GNU General Public License for more details.
18; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
19;
20
21%ifndef ROMVARS_INC
22%define ROMVARS_INC
23
24; ROM Variables. Written to the ROM image before flashing.
25struc ROMVARS
26    .wRomSign           resb    2   ; ROM Signature (AA55h)
27    .bRomSize           resb    1   ; ROM size in 512 byte blocks
28    .rgbJump            resb    3   ; First instruction to ROM init (jmp)
29
30    .rgbSign            resb    8   ; Signature for XTIDE Configurator Program
31    .szTitle            resb    31  ; BIOS title string
32    .szVersion          resb    25  ; BIOS version string
33
34    .wFlags             resb    2   ; Word for ROM flags
35    .wDisplayMode       resb    2   ; Display mode for boot menu
36    .wBootTimeout       resb    2   ; Boot Menu selection timeout in system timer ticks
37    .bIdeCnt            resb    1   ; Number of available IDE controllers
38    .bBootDrv           resb    1   ; Default drive to boot from
39    .bMinFddCnt         resb    1   ; Minimum number of Floppy Drives
40    .bStealSize         resb    1   ; Number of 1kB blocks stolen from 640kB base RAM
41    .bIdleTimeout       resb    1   ; Standby timer value
42
43    .ideVarsBegin:
44    .ideVars0           resb    IDEVARS_size
45    .ideVars1           resb    IDEVARS_size
46    .ideVars2           resb    IDEVARS_size
47    .ideVars3           resb    IDEVARS_size
48
49%ifdef MODULE_SERIAL
50    .ideVarsSerialAuto  resb    IDEVARS_size
51%endif
52
53    .ideVarsEnd:
54endstruc
55
56%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
57    %if ROMVARS.ideVarsEnd & 0xff00 <> 0
58        %error ".ideVars structures must fit within the first 256 bytes of the ROM image"
59    %endif
60    %if (ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin) = 0
61        %error "there must be at least one .ideVars structure, it would be bizarre if this were not true, but it is assumed in the ah0h reset code."
62    %endif
63%endif
64
65NUMBER_OF_IDEVARS                   EQU ((ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin) / IDEVARS_size)
66
67; Bit defines for ROMVARS.wFlags
68FLG_ROMVARS_FULLMODE                EQU (1<<0)  ; Full operating mode (steals base RAM, supports EBIOS etc.)
69FLG_ROMVARS_SERIAL_SCANDETECT       EQU (1<<3)  ; Scan COM ports at the end of drive detection.  Can also be invoked
70                                                ; by holding down the ALT key at the end of drive detection.
71                                                ; (Conveniently, this is 8, a fact we exploit when testing the bit)
72
73; Here in case the configuration needs to know functionality is present
74FLG_ROMVARS_MODULE_FEATURE_SETS         EQU (1<<5)
75FLG_ROMVARS_MODULE_8BIT_IDE             EQU (1<<6)
76FLG_ROMVARS_MODULE_8BIT_IDE_ADVANCED    EQU (1<<7)
77FLG_ROMVARS_MODULE_ADVANCED_ATA         EQU (1<<8)
78FLG_ROMVARS_MODULE_BOOT_MENU            EQU (1<<9)
79FLG_ROMVARS_MODULE_EBIOS                EQU (1<<10)
80FLG_ROMVARS_MODULE_HOTKEYS              EQU (1<<11)
81FLG_ROMVARS_MODULE_IRQ                  EQU (1<<12)
82FLG_ROMVARS_MODULE_SERIAL               EQU (1<<13)
83FLG_ROMVARS_MODULE_SERIAL_FLOPPY        EQU (1<<14)
84FLG_ROMVARS_MODULE_STRINGS_COMPRESSED   EQU (1<<15)
85
86
87; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes)
88DEFAULT_TEXT_MODE       EQU 4
89
90
91; Controller specific variables
92struc IDEVARS
93;;; Word 0
94    .wSerialPortAndBaud:                    ; Serial connection port (low, divided by 4) and baud rate divisor (high)
95    .wBasePort:                             ; IDE Base Port for Command Block (usual) Registers
96    .bSerialPort                resb    1
97    .bSerialBaud                resb    1
98
99;;; Word 1
100    .wControlBlockPort:
101    .bXTCFcontrolRegister:                  ; XT-CF autodetects ports
102    .bSerialUnused              resb    1   ; IDE Base Port for Control Block Registers
103
104    .wSerialCOMPortCharAndDevice:           ; In DetectPrint, we grab the COM Port char and Device at the same time
105    .bSerialCOMPortChar         resb    1   ; Serial connection COM port number/letter
106
107;;; Word 2
108    .bDevice                    resb    1   ; Device type
109    .bIRQ                       resb    1   ; Interrupt Request Number
110
111;;; And more...
112    .drvParamsMaster            resb    DRVPARAMS_size
113    .drvParamsSlave             resb    DRVPARAMS_size
114endstruc
115
116%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
117    %if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice
118        %error "IDEVARS.bSerialCOMPortChar needs to come immediately before IDEVARS.bDevice so that both bytes can be fetched at the same time inside DetectPrint.asm"
119    %endif
120%endif
121
122STANDARD_CONTROL_BLOCK_OFFSET           EQU     200h
123XTIDE_CONTROL_BLOCK_OFFSET              EQU     8h
124XTCF_CONTROL_BLOCK_OFFSET               EQU     (XTIDE_CONTROL_BLOCK_OFFSET << 1)
125
126; Default values for Port and PortCtrl, shared with the configurator
127;
128DEVICE_XTIDE_DEFAULT_PORT               EQU     300h
129DEVICE_XTIDE_DEFAULT_PORTCTRL           EQU     (DEVICE_XTIDE_DEFAULT_PORT + XTIDE_CONTROL_BLOCK_OFFSET)
130
131DEVICE_ATA_PRIMARY_PORT                 EQU     1F0h
132DEVICE_ATA_PRIMARY_PORTCTRL             EQU     (DEVICE_ATA_PRIMARY_PORT + STANDARD_CONTROL_BLOCK_OFFSET)
133
134DEVICE_ATA_SECONDARY_PORT               EQU     170h
135DEVICE_ATA_SECONDARY_PORTCTRL           EQU     (DEVICE_ATA_SECONDARY_PORT + STANDARD_CONTROL_BLOCK_OFFSET)
136
137DEVICE_ATA_TERTIARY_PORT                EQU     1E8h
138DEVICE_ATA_TERTIARY_PORTCTRL            EQU     (DEVICE_ATA_TERTIARY_PORT + STANDARD_CONTROL_BLOCK_OFFSET)
139
140DEVICE_ATA_QUATERNARY_PORT              EQU     168h
141DEVICE_ATA_QUATERNARY_PORTCTRL          EQU     (DEVICE_ATA_QUATERNARY_PORT + STANDARD_CONTROL_BLOCK_OFFSET)
142
143
144; Device types for IDEVARS.bDevice
145; IDE Devices are grouped so device numbers cannot be changed without modifying code elsewhere!
146;
147COUNT_OF_STANDARD_IDE_DEVICES           EQU 2   ; 16- and 32-bit controllers
148COUNT_OF_8BIT_IDE_DEVICES               EQU 7
149COUNT_OF_ALL_IDE_DEVICES                EQU (COUNT_OF_8BIT_IDE_DEVICES + COUNT_OF_STANDARD_IDE_DEVICES)
150; Standard port mapped I/O
151DEVICE_16BIT_ATA                        EQU (0<<1)
152DEVICE_32BIT_ATA                        EQU (1<<1)
153DEVICE_8BIT_ATA                         EQU ((COUNT_OF_STANDARD_IDE_DEVICES+0)<<1)  ; 16- or 32-bit controller in 8-bit mode
154DEVICE_8BIT_XTIDE_REV1                  EQU ((COUNT_OF_STANDARD_IDE_DEVICES+1)<<1)
155; Address lines A0 and A3 are swapped
156DEVICE_8BIT_XTIDE_REV2                  EQU ((COUNT_OF_STANDARD_IDE_DEVICES+2)<<1)  ; Or rev 1 with swapped A0 and A3
157; IDE Register offsets are SHL 1
158DEVICE_8BIT_XTCF_PIO8                   EQU ((COUNT_OF_STANDARD_IDE_DEVICES+3)<<1)  ; XT-CF using 8-bit PIO mode
159DEVICE_8BIT_XTCF_DMA                    EQU ((COUNT_OF_STANDARD_IDE_DEVICES+4)<<1)  ; XT-CF using DMA
160DEVICE_8BIT_XTCF_MEMMAP                 EQU ((COUNT_OF_STANDARD_IDE_DEVICES+5)<<1)  ; XT-CF using Memory Mapped transfers (not I/O)
161; Memory Mapped I/O
162DEVICE_8BIT_JRIDE_ISA                   EQU ((COUNT_OF_STANDARD_IDE_DEVICES+6)<<1)  ; JR-IDE/ISA (Memory Mapped I/O)
163; Virtual devices
164DEVICE_SERIAL_PORT                      EQU (COUNT_OF_ALL_IDE_DEVICES<<1)
165
166
167
168; Master/Slave drive specific parameters
169struc DRVPARAMS
170    .wFlags         resb    2   ; Drive flags
171    .dwMaximumLBA:              ; User specified maximum number of sectors
172    .wCylinders     resb    2   ; User specified cylinders (1...16383)
173    .wHeadsAndSectors:
174    .bHeads         resb    1   ; User specified Heads (1...16)
175    .bSect          resb    1   ; User specified Sectors per track (1...63)
176endstruc
177
178; Bit defines for DRVPARAMS.wFlags
179MASK_DRVPARAMS_WRITECACHE       EQU (3<<0)  ; Bits 0...1, Drive internal write cache settings (must start at bit 0)
180    DEFAULT_WRITE_CACHE             EQU 0   ; Must be 0
181    DISABLE_WRITE_CACHE             EQU 1
182    ENABLE_WRITE_CACHE              EQU 2
183MASK_DRVPARAMS_TRANSLATEMODE    EQU (3<<TRANSLATEMODE_FIELD_POSITION)   ; Bits 2...3, Position shared with DPT
184    TRANSLATEMODE_FIELD_POSITION    EQU 2
185    TRANSLATEMODE_NORMAL            EQU 0
186    TRANSLATEMODE_LARGE             EQU 1
187    TRANSLATEMODE_ASSISTED_LBA      EQU 2   ; 28-bit or 48-bit LBA
188    TRANSLATEMODE_AUTO              EQU 3   ; Only available in ROMVARS, not in DPTs
189FLG_DRVPARAMS_BLOCKMODE         EQU (1<<4)  ; Enable Block mode transfers
190FLG_DRVPARAMS_USERCHS           EQU (1<<5)  ; User specified P-CHS values
191    MAX_USER_CYLINDERS              EQU 16383
192    MAX_USER_HEADS                  EQU 16
193    MAX_USER_SECTORS_PER_TRACK      EQU 63
194FLG_DRVPARAMS_USERLBA           EQU (1<<6)  ; User specified LBA value
195    MIN_USER_LBA_COUNT              EQU ((MAX_USER_CYLINDERS*MAX_USER_HEADS*MAX_USER_SECTORS_PER_TRACK)+1)
196    MAX_USER_LBA_COUNT              EQU ((2^28)-1)
197
198
199%endif ; ROMVARS_INC
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