source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc@ 244

Last change on this file since 244 was 244, checked in by gregli@…, 12 years ago

Removed tiny optimization for DEVICE_SERIAL being the last device type - not worth the fragility and couldn't be checked by the assembler.

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)
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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