source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc @ 242

Last change on this file since 242 was 242, checked in by krille_n_@…, 12 years ago

Changes:

  • Optimizations (both for size and speed) in IdeTransfer.asm and MemIdeTransfer.asm
  • Fixed a bug where the SingleByteRead/Write functions in IdeTransfer.asm would fail on 128 sector transfers.
  • Fixed some typos and errors in general, comments etc.
File size: 4.8 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Defines for ROMVARS struct containing variables stored
3;                   in BIOS ROM.
4%ifndef ROMVARS_INC
5%define ROMVARS_INC
6
7; ROM Variables. Written to the ROM image before flashing.
8struc ROMVARS
9    .wRomSign           resb    2   ; ROM Signature (AA55h)
10    .bRomSize           resb    1   ; ROM size in 512 byte blocks
11    .rgbJump            resb    3   ; First instruction to ROM init (jmp)
12
13    .rgbSign            resb    8   ; Signature for XTIDE Configurator Program
14    .szTitle            resb    31  ; BIOS title string
15    .szVersion          resb    25  ; BIOS version string
16
17    .wFlags             resb    2   ; Word for ROM flags
18    .wDisplayMode       resb    2   ; Display mode for boot menu
19    .wBootTimeout       resb    2   ; Boot Menu selection timeout in system timer ticks
20    .bIdeCnt            resb    1   ; Number of available IDE controllers
21    .bBootDrv           resb    1   ; Boot Menu default drive
22    .bMinFddCnt         resb    1   ; Minimum number of Floppy Drives
23    .bStealSize         resb    1   ; Number of 1kB blocks stolen from 640kB base RAM
24
25    .ideVars0           resb    IDEVARS_size
26    .ideVars1           resb    IDEVARS_size
27    .ideVars2           resb    IDEVARS_size
28    .ideVars3           resb    IDEVARS_size
29
30%ifdef MODULE_SERIAL
31    .ideVarsSerialAuto  resb    IDEVARS_size
32%endif
33endstruc
34
35; Bit defines for ROMVARS.wFlags
36FLG_ROMVARS_FULLMODE                EQU (1<<0)  ; Full operating mode (steals base RAM, supports EBIOS etc.)
37FLG_ROMVARS_DRVXLAT                 EQU (1<<2)  ; Enable drive number translation
38FLG_ROMVARS_SERIAL_SCANDETECT       EQU (1<<3)  ; Scan COM ports at the end of drive detection.  Can also be invoked
39                                                ; by holding down the ALT key at the end of drive detection.
40                                                ; (Conveniently, this is 8, a fact we exploit when testing the bit)
41FLG_ROMVARS_MODULE_SERIAL           EQU (1<<6)  ; Here in case the configuration needs to know functionality is present
42FLG_ROMVARS_MODULE_EBIOS            EQU (1<<7)  ; Here in case the configuration needs to know functionality is present
43
44; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes)
45DEFAULT_TEXT_MODE       EQU 4
46
47
48; Controller specific variables
49struc IDEVARS
50;;; Word 0
51    .wSerialPortAndBaud:                    ; Serial connection port (low, divided by 4) and baud rate divisor (high)
52    .wPort:                                 ; IDE Base Port for Command Block (usual) Registers
53    .bSerialPort                resb    1
54    .bSerialBaud                resb    1
55
56;;; Word 1
57    .wPortCtrl:
58    .bSerialUnused              resb    1   ; IDE Base Port for Control Block Registers
59
60    .wSerialCOMPortCharAndDevice:           ; In DetectPrint, we grab the COM Port char and Device at the same time
61    .bSerialCOMPortChar         resb    1   ; Serial connection COM port number/letter
62
63;;; Word 2
64    .bDevice                    resb    1   ; Device type
65
66    .bIRQ                       resb    1   ; Interrupt Request Number
67
68;;; And more...
69    .drvParamsMaster            resb    DRVPARAMS_size
70    .drvParamsSlave             resb    DRVPARAMS_size
71endstruc
72
73%if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice
74    %error "IDEVARS.bSerialCOMPortChar needs to come immediately before IDEVARS.bDevice so that both bytes can be fetched at the same time inside DetectPrint.asm"
75%endif
76
77; Default values for Port and PortCtrl, shared with the configurator
78;
79DEVICE_XTIDE_DEFAULT_PORT               EQU     300h
80DEVICE_XTIDE_DEFAULT_PORTCTRL           EQU     308h
81DEVICE_ATA_DEFAULT_PORT                 EQU     1F0h
82DEVICE_ATA_DEFAULT_PORTCTRL             EQU     3F0h
83
84; Device types for IDEVARS.bDevice
85;
86DEVICE_8BIT_DUAL_PORT_XTIDE             EQU (0<<1)
87DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0    EQU (1<<1)
88DEVICE_8BIT_SINGLE_PORT                 EQU (2<<1)
89DEVICE_16BIT_ATA                        EQU (3<<1)
90DEVICE_32BIT_ATA                        EQU (4<<1)
91DEVICE_SERIAL_PORT                      EQU (5<<1)      ; must be last entry, or remove optimization in DetectPrint
92DEVICE_JRIDE_ISA                        EQU (6<<1)
93
94
95; Master/Slave drive specific parameters
96struc DRVPARAMS
97    .wFlags         resb    2   ; Drive flags
98    .dwMaximumLBA:              ; User specified maximum number of sectors
99    .wCylinders     resb    2   ; User specified cylinders (1...16383)
100    .wHeadsAndSectors:
101    .bHeads         resb    1   ; User specified Heads (1...16)
102    .bSect          resb    1   ; User specified Sectors per track (1...63)
103endstruc
104
105; Bit defines for DRVPARAMS.wFlags
106FLG_DRVPARAMS_USERCHS   EQU (1<<0)  ; User specified P-CHS values
107FLG_DRVPARAMS_BLOCKMODE EQU (1<<1)  ; Enable Block mode transfers
108FLG_DRVPARAMS_USERLBA   EQU (1<<2)  ; User specified LBA values
109
110;
111; COM Number to I/O Port Address Mapping
112;
113; COM Number:                               1,    2,    3,    4,    5,    6,    7,    8,    9,   10,   11,   12
114; Corresponds to I/O port:                3f8,  2f8,  3e8,  2e8,  2f0,  3e0,  2e0,  260,  368,  268,  360,  270
115; Corresponds to Packed I/O port (hex):    37,   17,   35,   15,   16,   34,   14,    4,   25,    5,   24,    6
116;
117DEVICE_SERIAL_COM1  EQU     3f8h
118DEVICE_SERIAL_COM2  EQU     2f8h
119DEVICE_SERIAL_COM3  EQU     3e8h
120DEVICE_SERIAL_COM4  EQU     2e8h
121DEVICE_SERIAL_COM5  EQU     2f0h
122DEVICE_SERIAL_COM6  EQU     3e0h
123DEVICE_SERIAL_COM7  EQU     2e0h
124DEVICE_SERIAL_COM8  EQU     260h
125DEVICE_SERIAL_COM9  EQU     368h
126DEVICE_SERIAL_COMA  EQU     268h
127DEVICE_SERIAL_COMB  EQU     360h
128DEVICE_SERIAL_COMC  EQU     270h
129
130
131%endif ; ROMVARS_INC
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