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Use faster method to write to VGA

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This commit is contained in:
Ray Chason
2019-09-12 23:04:15 -04:00
parent 1a97dce727
commit d5104c622f
2 changed files with 63 additions and 54 deletions
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4
sys/msdos/portio.h
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@@ -44,6 +44,7 @@
#define READ_ABSOLUTE_WORD(x) *(x)
#define WRITE_ABSOLUTE(x, y) *(x) = (y)
#define WRITE_ABSOLUTE_WORD(x, y) *(x) = (y)
#define WRITE_ABSOLUTE_DWORD(x, y) *(x) = (y)
#endif
#if defined(__GO32__) || defined(__DJGPP__)
@@ -57,6 +58,8 @@
_farpokeb(_go32_conventional_mem_selector(), (unsigned) x, (y))
#define WRITE_ABSOLUTE_WORD(x, y) \
_farpokew(_go32_conventional_mem_selector(), (unsigned) x, (y))
#define WRITE_ABSOLUTE_DWORD(x, y) \
_farpokel(_go32_conventional_mem_selector(), (unsigned) x, (y))
#endif
#ifdef OBSOLETE /* old djgpp V1.x way of mapping 1st MB */
@@ -66,6 +69,7 @@
#define READ_ABSOLUTE_WORD(x) *(x)
#define WRITE_ABSOLUTE(x, y) *(x) = (y)
#define WRITE_ABSOLUTE_WORD(x, y) *(x) = (y)
#define WRITE_ABSOLUTE_DWORD(x, y) *(x) = (y)
#endif
#endif /* MK_PTR */