source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc @ 203

Last change on this file since 203 was 203, checked in by gregli@…, 12 years ago

Reworked the 'skip detecting the slave if there was no master' code to be more complete (includes configurator drives) and to take into account int13h/25h calls. Some of the changes in my last checkin have been rolled back as a result (they are no longer needed). I did take a byte out of RAMVARS, but there was an alignment byte available for the taking. I also added a perl script for padding and adding the checksum byte to a binary image, which can be invoked manually or with 'make checksum'.
File size: 6.5 KB
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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    .wPort:                                 ; IDE Base Port for Command Block (usual) Registers
51    .bSerialCOMDigit            resb    1   ; Serial Device COM Port digit
52    .bSerialPackedPortAndBaud   resb    1   ; Serial Device packed port and baud
53
54    .wPortCtrl:                             ; IDE Base Port for Control Block Registers
55    .wSerialPackedPrintBaud     resb    2   ; Serial Device packed baud rate for printing
56
57    .bDevice                    resb    1   ; Device type
58    .bIRQ                       resb    1   ; Interrupt Request Number
59    .drvParamsMaster            resb    DRVPARAMS_size
60    .drvParamsSlave             resb    DRVPARAMS_size
61endstruc
62
63; Default values for Port and PortCtrl, shared with the configurator
64;
65DEVICE_XTIDE_DEFAULT_PORT               EQU     300h
66DEVICE_XTIDE_DEFAULT_PORTCTRL           EQU     308h
67DEVICE_ATA_DEFAULT_PORT                 EQU     1F0h
68DEVICE_ATA_DEFAULT_PORTCTRL             EQU     3F0h
69DEVICE_SERIAL_DEFAULT_COM               EQU     0       ; COM1
70DEVICE_SERIAL_DEFAULT_BAUD              EQU     1       ; 9600
71
72; Device types for IDEVARS.bDevice
73;
74DEVICE_8BIT_DUAL_PORT_XTIDE             EQU (0<<1)
75DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0    EQU (1<<1)
76DEVICE_8BIT_SINGLE_PORT                 EQU (2<<1)
77DEVICE_16BIT_ATA                        EQU (3<<1)
78DEVICE_32BIT_ATA                        EQU (4<<1)
79DEVICE_SERIAL_PORT                      EQU (5<<1)
80
81
82; Master/Slave drive specific parameters
83struc DRVPARAMS
84    .wFlags         resb    2   ; Drive flags
85    .wCylinders     resb    2   ; User specified cylinders (1...16383)
86    .wHeadsAndSectors:
87    .bHeads         resb    1   ; User specified Heads (1...16)
88    .bSect          resb    1   ; User specified Sectors per track (1...63)
89endstruc
90
91; Bit defines for DRVPARAMS.wFlags
92FLG_DRVPARAMS_USERCHS   EQU (1<<0)  ; User specified P-CHS values
93FLG_DRVPARAMS_BLOCKMODE EQU (1<<1)  ; Enable Block mode transfers
94
95
96; Defines for IDEVARS.bSerialPackedPortAndBaud (same format used by DPT.bSerialPortAndBaud)
97;
98; pppp ppbb
99;   i/o port address = p * 2 + 240h
100;   baud rate = b, where 00 = 2400, 01 = 9600, 10 = 38.4K, 11 = 115.2K
101;
102; 240h/2400baud corresponds to 0 for a PackedPortAndBaud value, which triggers auto detect code.
103; Which means 240h is not usable, and is why ..._MINPORT is 248h.  A value is reserved at the upper
104; end of the spectrum in case it is needed (whcih is why it is 430h instead of 438h).
105;
106DEVICE_SERIAL_PACKEDPORTANDBAUD_PORTMASK            EQU     0fch
107DEVICE_SERIAL_PACKEDPORTANDBAUD_PORTBITS            EQU     03fh
108DEVICE_SERIAL_PACKEDPORTANDBAUD_PORT_FIELD_POSITION EQU     2
109DEVICE_SERIAL_PACKEDPORTANDBAUD_STARTINGPORT        EQU     240h
110DEVICE_SERIAL_PACKEDPORTANDBAUD_MINPORT             EQU     248h    ; minimum port value that the user can set
111DEVICE_SERIAL_PACKEDPORTANDBAUD_MAXPORT             EQU     430h    ; or ((..._PORTMASK-1) << 1) + ..._STARTINGPORT
112
113DEVICE_SERIAL_PACKEDPORTANDBAUD_BAUDMASK            EQU     3h
114DEVICE_SERIAL_PACKEDPORTANDBAUD_BAUDBITS            EQU     3h
115DEVICE_SERIAL_PACKEDPORTANDBAUD_BAUD_FIELD_POSITION EQU     0
116
117; Defines for IDEVARS.wSerialPrintBaud
118;
119; pppp ppnn nnnn nnnn
120;   unsigned number to output = n
121;   postfix character = p + '0' (designed for '0' and 'K', although other values are possible)
122;
123; Note that the contents of this word is only used for printing by the BIOS when a drive is detected. 
124; It is not used for any other purpose, and so long as it conforms to the structure, any values can be used.
125;
126DEVICE_SERIAL_PRINTBAUD_NUMBERMASK      EQU     003ffh
127DEVICE_SERIAL_PRINTBAUD_POSTCHARMASK    EQU     0fc00h
128DEVICE_SERIAL_PRINTBAUD_POSTCHARADD     EQU     '0'
129;
130; These are defined here (instead of in the configurator) for consistency since they could also be used
131; in main.asm as a default for an IDEVARS structure.
132;
133DEVICE_SERIAL_PRINTBAUD_2400  EQU ((('0'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 240)       ; Prints "2400"
134DEVICE_SERIAL_PRINTBAUD_9600  EQU ((('0'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 960)       ; Prints "9600"
135DEVICE_SERIAL_PRINTBAUD_38_4  EQU ((('K'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 38)        ; Prints "38K"
136DEVICE_SERIAL_PRINTBAUD_115_2 EQU ((('K'-DEVICE_SERIAL_PRINTBAUD_POSTCHARADD)<<10) | 115)       ; Prints "115K"
137
138;
139; COM Number to I/O Port Address Mapping
140;
141; COM Number:                               1,    2,    3,    4,    5,    6,    7,    8,    9,   10,   11,   12     
142; Corresponds to I/O port:                3f8,  2f8,  3e8,  2e8,  2f0,  3e0,  2e0,  260,  368,  268,  360,  270
143; Corresponds to Packed I/O port (hex):    37,   17,   35,   15,   16,   34,   14,    4,   25,    5,   24,    6
144;
145DEVICE_SERIAL_COM1  EQU     3f8h
146DEVICE_SERIAL_COM2  EQU     2f8h
147DEVICE_SERIAL_COM3  EQU     3e8h
148DEVICE_SERIAL_COM4  EQU     2e8h
149DEVICE_SERIAL_COM5  EQU     2f0h
150DEVICE_SERIAL_COM6  EQU     3e0h
151DEVICE_SERIAL_COM7  EQU     2e0h
152DEVICE_SERIAL_COM8  EQU     260h
153DEVICE_SERIAL_COM9  EQU     368h
154DEVICE_SERIAL_COMA  EQU     268h
155DEVICE_SERIAL_COMB  EQU     360h
156DEVICE_SERIAL_COMC  EQU     270h
157
158
159%endif ; ROMVARS_INC
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