FreeBasic Bare Bones: Difference between revisions
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<!-- GeSHi is *broken*. don't use freebasic as language here !--> |
<!-- GeSHi is *broken*. don't use freebasic as language here !--> |
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<source lang="qbasic"> |
<source lang="qbasic"> |
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Declare Sub PrintString(src |
Declare Sub PrintString(src As Byte Ptr, x As Long, y As Long) |
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Declare Sub main () |
Declare Sub main () |
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Sub multiboot () |
Sub multiboot () |
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'setting up the Multiboot header - see GRUB docs for details |
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const CHECKSUM = -(MAGIC + FLAGS) |
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const STACKSIZE = &h4000 |
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. |
.set CHECKSUM, -(MAGIC + FLAGS) |
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.LONG FLAGS |
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.align 4 |
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.long MAGIC |
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.long CHECKSUM |
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.set STACKSIZE, 0x4000 |
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.global loader |
.global loader |
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loader: |
loader: |
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lea esp, |
lea esp, stack + STACKSIZE |
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push eax |
push eax |
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push ebx |
push ebx |
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call MAIN |
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cli |
cli |
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hlt |
hlt |
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End Asm |
End Asm |
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End Sub |
End Sub |
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Sub main () |
Sub main () |
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Const s = "Hello World" |
Const s = "Hello World" |
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PrintString CPtr(Byte Ptr, @s), 35, 12 |
PrintString CPtr(Byte Ptr, @s), 35, 12 |
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End Sub |
End Sub |
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Sub PrintString(src |
Sub PrintString(src As Byte Ptr, x As Long, y As Long) |
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Dim dst |
Dim dst as Byte Ptr |
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Dim counter |
Dim counter as Long |
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dst = CPtr(Byte Ptr, &HB8000 + y * 160 + x * 2) |
dst = CPtr(Byte Ptr, &HB8000 + y * 160 + x * 2) |
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counter = 0 |
counter = 0 |
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while src[counter] <> 0 |
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dst[2 * counter] = src[counter] |
dst[2 * counter] = src[counter] |
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dst[2 * counter + 1] = 15 |
dst[2 * counter + 1] = 15 |
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counter = counter + 1 |
counter = counter + 1 |
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wend |
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End Sub |
End Sub |
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</source> |
</source> |
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