source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc@ 92

Last change on this file since 92 was 92, checked in by Tomi Tilli, 13 years ago

Changes to XTIDE Universal BIOS:

  • Removed ROM Boot from boot menu and created a hotkey for it.
File size: 2.4 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. There are written to 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 23 ; BIOS version string
16
17 .wFlags resb 2 ; Word for ROM flags
18 .bIdeCnt resb 1 ; Number of available IDE controllers
19 .bBootDrv resb 1 ; Boot Menu default drive
20 .bBootDelay resb 1 ; Boot Menu selection delay in seconds
21 .bMinFddCnt resb 1 ; Minimum number of Floppy Drives
22 .bStealSize resb 1 ; Number of 1kB blocks stolen from 640kB base RAM
23
24 .ideVars0 resb IDEVARS_size
25 .ideVars1 resb IDEVARS_size
26 .ideVars2 resb IDEVARS_size
27 .ideVars3 resb IDEVARS_size
28endstruc
29
30; Bit defines for ROMVARS.wFlags
31FLG_ROMVARS_FULLMODE EQU (1<<0) ; Full operating mode (steals base RAM, supports EBIOS etc.)
32FLG_ROMVARS_DRVXLAT EQU (1<<2) ; Enable drive number translation
33FLG_ROMVARS_MAXSIZE EQU (1<<5) ; Maximize size by sacrificing compatibility with some old BIOSes
34
35
36; Controller specific variables
37struc IDEVARS
38 .wPort resb 2 ; IDE Base Port for Command Block (usual) Registers
39 .wPortCtrl resb 2 ; IDE Base Port for Control Block Registers
40 .bBusType resb 1 ; Bus type
41 .bIRQ resb 1 ; Interrupt Request Number
42 .drvParamsMaster resb DRVPARAMS_size
43 .drvParamsSlave resb DRVPARAMS_size
44endstruc
45
46; Bus types for IDEVARS.bBusType
47BUS_TYPE_8_DUAL EQU (0<<1) ; XTIDE transfers with two 8-bit data ports
48BUS_TYPE_16 EQU (1<<1) ; Normal 16-bit AT-IDE transfers
49BUS_TYPE_32 EQU (2<<1) ; 32-bit VLB and PCI transfers
50BUS_TYPE_8_SINGLE EQU (3<<1) ; 8-bit transfers with single 8-bit data port
51
52
53; Master/Slave drive specific parameters
54struc DRVPARAMS
55 .wFlags resb 2 ; Drive flags
56 .wCylinders resb 2 ; User specified cylinders (1...16383)
57 .wSectAndHeads:
58 .bSect resb 1 ; User specified Sectors per track (1...63)
59 .bHeads resb 1 ; User specified Heads (1...16)
60endstruc
61
62; Bit defines for DRVPARAMS.wFlags
63FLG_DRVPARAMS_USERCHS EQU (1<<0) ; User specified P-CHS values
64FLG_DRVPARAMS_BLOCKMODE EQU (1<<1) ; Enable Block mode transfers
65
66
67%endif ; ROMVARS_INC
Note: See TracBrowser for help on using the repository browser.