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a2sudoku
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Use the volatile keyword with all inline assembly to make sure the optimizer does not discard it.

This commit is contained in:
Jeremy Rand 2018-10-21 14:24:03 -04:00
parent beb9d2666f
commit 75f85b94e8
4 changed files with 3 additions and 3 deletions
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BIN
a2sudoku.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate generated
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a2sudoku/make/V2Make.scpt
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2
a2sudoku/puzzles.c
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@ -50,7 +50,7 @@ tPuzzle thePuzzle;
void fileReadProblem(char *filename)
{
clrscr();
asm ("STA %w", 0xc051);
asm volatile ("STA %w", 0xc051);
printf("\n\nUnable to read file %s\nPress any key to quit", filename);
cgetc();
exit(0);

4
a2sudoku/ui.c
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@ -201,13 +201,13 @@ void shutdownUI(void)
void textMode(void)
{
clrscr();
asm ("STA %w", 0xc051);
asm volatile ("STA %w", 0xc051);
}
void graphicsMode(void)
{
asm ("STA %w", 0xc050);
asm volatile ("STA %w", 0xc050);
}