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Last change
on this file since 208 was 152, checked in by Tomi Tilli, 14 years ago |
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Changes to XTIDE Universal BIOS:
- XTIDE mod should now be supported (untested).
- Interrupt Service Routine no longer requires variable from RAMVARS.
- Some small improvements.
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File size:
1.2 KB
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| Rev | Line | |
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| [90] | 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Late initialization for XT builds.
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| 3 |
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| 4 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | ;--------------------------------------------------------------------
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| 8 | ; Int19hLate_InitializeInt19h
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| 9 | ; Parameters:
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| 10 | ; ES: BDA segment
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| 11 | ; Returns:
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| 12 | ; Nothing
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| 13 | ; Corrupts registers:
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| 14 | ; BX, SI
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| 15 | ;--------------------------------------------------------------------
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| 16 | ALIGN JUMP_ALIGN
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| 17 | Int19hLate_InitializeInt19h:
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| [152] | 18 | mov bx, BIOS_BOOT_LOADER_INTERRUPT_19h
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| [90] | 19 | mov si, HandlerForLateInitialization
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| 20 | jmp Interrupts_InstallHandlerToVectorInBXFromCSSI
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| 21 |
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| 22 |
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| 23 | ;--------------------------------------------------------------------
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| 24 | ; HandlerForLateInitialization
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| 25 | ; Parameters:
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| 26 | ; Nothing
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| 27 | ; Returns:
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| 28 | ; Never returns
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| 29 | ;--------------------------------------------------------------------
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| 30 | ALIGN JUMP_ALIGN
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| 31 | HandlerForLateInitialization:
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| 32 | LOAD_BDA_SEGMENT_TO es, ax
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| [152] | 33 | call Initialize_ShouldSkip ; Skip initialization?
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| [90] | 34 | jnz SHORT .SkipInitialization
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| [152] | 35 | call Initialize_AndDetectDrives ; Installs boot menu loader
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| 36 | int BIOS_BOOT_LOADER_INTERRUPT_19h
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| [90] | 37 | .SkipInitialization:
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| [152] | 38 | call RamVars_Initialize ; RAMVARS must be initialized even for simple boot loader
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| 39 | int BIOS_BOOT_LOADER_INTERRUPT_19h ; Call default system boot loader
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