source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc @ 243

Last change on this file since 243 was 243, checked in by aitotat@…, 11 years ago

Changes to XTIDE Universal BIOS:

  • Brought back optional "A then C" boot loader.
  • Now there is only one INT 19h handler that remains unchanged.
File size: 5.0 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    .wfDisplayBootMenu:             ; Zero = no Boot Menu, non-zero = Boot Menu timeout
20    .wBootTimeout       resb    2   ; Boot Menu selection timeout in system timer ticks
21    .bIdeCnt            resb    1   ; Number of available IDE controllers
22    .bBootDrv           resb    1   ; Boot Menu default drive
23    .bMinFddCnt         resb    1   ; Minimum number of Floppy Drives
24    .bStealSize         resb    1   ; Number of 1kB blocks stolen from 640kB base RAM
25
26    .ideVars0           resb    IDEVARS_size
27    .ideVars1           resb    IDEVARS_size
28    .ideVars2           resb    IDEVARS_size
29    .ideVars3           resb    IDEVARS_size
30
31%ifdef MODULE_SERIAL
32    .ideVarsSerialAuto  resb    IDEVARS_size
33%endif
34endstruc
35
36; Bit defines for ROMVARS.wFlags
37FLG_ROMVARS_FULLMODE                EQU (1<<0)  ; Full operating mode (steals base RAM, supports EBIOS etc.)
38FLG_ROMVARS_DRVXLAT                 EQU (1<<2)  ; Enable drive number translation
39FLG_ROMVARS_SERIAL_SCANDETECT       EQU (1<<3)  ; Scan COM ports at the end of drive detection.  Can also be invoked
40                                                ; by holding down the ALT key at the end of drive detection.
41                                                ; (Conveniently, this is 8, a fact we exploit when testing the bit)
42FLG_ROMVARS_MODULE_JRIDE            EQU (1<<5)  ; Here in case the configuration needs to know functionality is present
43FLG_ROMVARS_MODULE_SERIAL           EQU (1<<6)  ; Here in case the configuration needs to know functionality is present
44FLG_ROMVARS_MODULE_EBIOS            EQU (1<<7)  ; Here in case the configuration needs to know functionality is present
45
46; Boot Menu Display Modes (see Assembly Library Display.inc for standard modes)
47DEFAULT_TEXT_MODE       EQU 4
48
49
50; Controller specific variables
51struc IDEVARS
52;;; Word 0
53    .wSerialPortAndBaud:                    ; Serial connection port (low, divided by 4) and baud rate divisor (high)
54    .wPort:                                 ; IDE Base Port for Command Block (usual) Registers
55    .bSerialPort                resb    1
56    .bSerialBaud                resb    1
57
58;;; Word 1
59    .wPortCtrl:
60    .bSerialUnused              resb    1   ; IDE Base Port for Control Block Registers
61
62    .wSerialCOMPortCharAndDevice:           ; In DetectPrint, we grab the COM Port char and Device at the same time
63    .bSerialCOMPortChar         resb    1   ; Serial connection COM port number/letter
64
65;;; Word 2
66    .bDevice                    resb    1   ; Device type
67
68    .bIRQ                       resb    1   ; Interrupt Request Number
69
70;;; And more...
71    .drvParamsMaster            resb    DRVPARAMS_size
72    .drvParamsSlave             resb    DRVPARAMS_size
73endstruc
74
75%if IDEVARS.bSerialCOMPortChar+1 != IDEVARS.bDevice
76    %error "IDEVARS.bSerialCOMPortChar needs to come immediately before IDEVARS.bDevice so that both bytes can be fetched at the same time inside DetectPrint.asm"
77%endif
78
79; Default values for Port and PortCtrl, shared with the configurator
80;
81DEVICE_XTIDE_DEFAULT_PORT               EQU     300h
82DEVICE_XTIDE_DEFAULT_PORTCTRL           EQU     308h
83DEVICE_ATA_DEFAULT_PORT                 EQU     1F0h
84DEVICE_ATA_DEFAULT_PORTCTRL             EQU     3F0h
85
86; Device types for IDEVARS.bDevice
87;
88DEVICE_8BIT_DUAL_PORT_XTIDE             EQU (0<<1)
89DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0    EQU (1<<1)
90DEVICE_8BIT_SINGLE_PORT                 EQU (2<<1)
91DEVICE_16BIT_ATA                        EQU (3<<1)
92DEVICE_32BIT_ATA                        EQU (4<<1)
93DEVICE_SERIAL_PORT                      EQU (5<<1)      ; must be last entry, or remove optimization in DetectPrint
94DEVICE_JRIDE_ISA                        EQU (6<<1)
95
96
97; Master/Slave drive specific parameters
98struc DRVPARAMS
99    .wFlags         resb    2   ; Drive flags
100    .dwMaximumLBA:              ; User specified maximum number of sectors
101    .wCylinders     resb    2   ; User specified cylinders (1...16383)
102    .wHeadsAndSectors:
103    .bHeads         resb    1   ; User specified Heads (1...16)
104    .bSect          resb    1   ; User specified Sectors per track (1...63)
105endstruc
106
107; Bit defines for DRVPARAMS.wFlags
108FLG_DRVPARAMS_USERCHS   EQU (1<<0)  ; User specified P-CHS values
109FLG_DRVPARAMS_BLOCKMODE EQU (1<<1)  ; Enable Block mode transfers
110FLG_DRVPARAMS_USERLBA   EQU (1<<2)  ; User specified LBA values
111
112;
113; COM Number to I/O Port Address Mapping
114;
115; COM Number:                               1,    2,    3,    4,    5,    6,    7,    8,    9,   10,   11,   12
116; Corresponds to I/O port:                3f8,  2f8,  3e8,  2e8,  2f0,  3e0,  2e0,  260,  368,  268,  360,  270
117; Corresponds to Packed I/O port (hex):    37,   17,   35,   15,   16,   34,   14,    4,   25,    5,   24,    6
118;
119DEVICE_SERIAL_COM1  EQU     3f8h
120DEVICE_SERIAL_COM2  EQU     2f8h
121DEVICE_SERIAL_COM3  EQU     3e8h
122DEVICE_SERIAL_COM4  EQU     2e8h
123DEVICE_SERIAL_COM5  EQU     2f0h
124DEVICE_SERIAL_COM6  EQU     3e0h
125DEVICE_SERIAL_COM7  EQU     2e0h
126DEVICE_SERIAL_COM8  EQU     260h
127DEVICE_SERIAL_COM9  EQU     368h
128DEVICE_SERIAL_COMA  EQU     268h
129DEVICE_SERIAL_COMB  EQU     360h
130DEVICE_SERIAL_COMC  EQU     270h
131
132
133%endif ; ROMVARS_INC
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