Apple-2-Tools/dsk2woz
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Fixes a couple of incorrect comments.

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Thomas Harte 2018-06-06 11:56:56 -04:00 committed by GitHub
parent 21cd5378d8
commit 4725ca3a58
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1 changed files with 9 additions and 3 deletions
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dsk2woz.c
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@ -90,8 +90,14 @@ int main(int argc, char *argv[]) {
strcpy((char *)&woz[68], "TMAP"); // Chunk ID. strcpy((char *)&woz[68], "TMAP"); // Chunk ID.
set_int32(72, 160); // Chunk size. set_int32(72, 160); // Chunk size.
// This is a DSK conversion, so the TMAP table is just the next // This is a DSK conversion, so the TMAP table simply maps every
// track in every fourth slot, with 255s in between. // track that exists to:
// (i) its integral position;
// (ii) the quarter-track position before its integral position; and
// (iii) the quarter-track position after its integral position.
//
// The remaining quarter-track position maps to nothing, which in
// WOZ is indicated with a value of 255.
for(int c = 0; c < 35; ++c) { for(int c = 0; c < 35; ++c) {
if (c > 0) woz[75 + (c << 2)] = c; if (c > 0) woz[75 + (c << 2)] = c;
woz[76 + (c << 2)] = woz[77 + (c << 2)] = c; woz[76 + (c << 2)] = woz[77 + (c << 2)] = c;
@ -110,7 +116,7 @@ int main(int argc, char *argv[]) {
strcpy((char *)&woz[236], "TRKS"); // Chunk ID. strcpy((char *)&woz[236], "TRKS"); // Chunk ID.
set_int32(240, 35*65536); // Chunk size. set_int32(240, 35*65536); // Chunk size.
// The output pointer holds a **bit** position into the WOZ buffer. // The output pointer holds a byte position into the WOZ buffer.
size_t output_pointer = 244; size_t output_pointer = 244;
// Write out all 35 tracks. // Write out all 35 tracks.