source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc @ 90

Last change on this file since 90 was 90, checked in by aitotat, 13 years ago

Changes to XTIDE Universal BIOS:

  • Removed INT 13h format and diagnostics functions.
  • Removed INT 18h callback handler.
  • Removed configuration for early/late initialization. Now XT builds always use late and AT build early initialization.
  • Reduced number of supported IDE controllers from 5 to 4.
  • Removed reserved configuration bytes.
  • Removed simple and system boot loaders.
File size: 2.5 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_ROMBOOT     EQU (1<<3)  ; Include ROMBOOT to boot menu
34FLG_ROMVARS_MAXSIZE     EQU (1<<5)  ; Maximize size by sacrificing compatibility with some old BIOSes
35
36
37; Controller specific variables
38struc IDEVARS
39    .wPort              resb    2   ; IDE Base Port for Command Block (usual) Registers
40    .wPortCtrl          resb    2   ; IDE Base Port for Control Block Registers
41    .bBusType           resb    1   ; Bus type
42    .bIRQ               resb    1   ; Interrupt Request Number
43    .drvParamsMaster    resb    DRVPARAMS_size
44    .drvParamsSlave     resb    DRVPARAMS_size
45endstruc
46
47; Bus types for IDEVARS.bBusType
48BUS_TYPE_8_DUAL         EQU (0<<1)  ; XTIDE transfers with two 8-bit data ports
49BUS_TYPE_16             EQU (1<<1)  ; Normal 16-bit AT-IDE transfers
50BUS_TYPE_32             EQU (2<<1)  ; 32-bit VLB and PCI transfers
51BUS_TYPE_8_SINGLE       EQU (3<<1)  ; 8-bit transfers with single 8-bit data port
52
53
54; Master/Slave drive specific parameters
55struc DRVPARAMS
56    .wFlags         resb    2   ; Drive flags
57    .wCylinders     resb    2   ; User specified cylinders (1...16383)
58    .wSectAndHeads:
59    .bSect          resb    1   ; User specified Sectors per track (1...63)
60    .bHeads         resb    1   ; User specified Heads (1...16)
61endstruc
62
63; Bit defines for DRVPARAMS.wFlags
64FLG_DRVPARAMS_USERCHS   EQU (1<<0)  ; User specified P-CHS values
65FLG_DRVPARAMS_BLOCKMODE EQU (1<<1)  ; Enable Block mode transfers
66
67
68%endif ; ROMVARS_INC
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