Last change
on this file since 181 was
152,
checked in by aitotat, 13 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.
|
File size:
1.2 KB
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Line | |
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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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18 | mov bx, BIOS_BOOT_LOADER_INTERRUPT_19h |
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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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33 | call Initialize_ShouldSkip ; Skip initialization? |
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34 | jnz SHORT .SkipInitialization |
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35 | call Initialize_AndDetectDrives ; Installs boot menu loader |
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36 | int BIOS_BOOT_LOADER_INTERRUPT_19h |
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37 | .SkipInitialization: |
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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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