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Add encode function for nib

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This commit is contained in:
Peter Evans 2018-01-31 15:40:39 -06:00
parent 4943d66e8c
commit 98c2ef16cc
1 changed files with 14 additions and 1 deletions
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15
src/apple2.enc.c
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@ -30,6 +30,17 @@ apple2_enc_dos(vm_segment *src)
return dest;
}
vm_segment *
apple2_enc_nib(vm_segment *src)
{
vm_segment *dest;
dest = vm_segment_create(src->size);
vm_segment_copy(dest, src, 0, 0, src->size);
return dest;
}
int
apple2_enc_track(vm_segment *dest, vm_segment *src,
int doff, int track)
@ -177,12 +188,14 @@ apple2_enc_4n4(vm_segment *seg, int off, vm_8bit val)
{
vm_segment_set(seg, off, ((val >> 1) & 0x55) | 0xaa);
vm_segment_set(seg, off+1, (val & 0x55) | 0xaa);
// 4n4 encoding always consumes two bytes
return 2;
}
int
apple2_enc_sector_header(vm_segment *seg, int off,
int track, int sect)
int track, int sect)
{
int orig = off;