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Revision fcd383ae04ef0382ad93b83ba82112104aa986e0, 0.5 KB
(checked in by H. Peter Anvin <hpa@…>, 3 years ago)
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dos: int 25/26 may be register-dirty; wrap them in assembly
int 25h and int 26h are known to be register-dirty for some versions
of DOS -- unlike int 21h, which is usually clean. As such, wrap those
in assembly functions.
Signed-off-by: H. Peter Anvin <hpa@…>
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| 1 | #ifndef MYSTUFF_H |
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| 2 | #define MYSTUFF_H |
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| 3 | |
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| 4 | #include <inttypes.h> |
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| 5 | |
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| 6 | #define NULL ((void *)0) |
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| 7 | |
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| 8 | unsigned int skip_atou(const char **s); |
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| 9 | unsigned int atou(const char *s); |
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| 10 | |
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| 11 | static inline int isdigit(int ch) |
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| 12 | { |
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| 13 | return (ch >= '0') && (ch <= '9'); |
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| 14 | } |
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| 15 | |
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| 16 | struct diskio { |
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| 17 | uint32_t startsector; |
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| 18 | uint16_t sectors; |
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| 19 | uint16_t bufoffs, bufseg; |
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| 20 | } __attribute__ ((packed)); |
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| 21 | int int25_read_sector(unsigned char drive, struct diskio *dio); |
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| 22 | int int26_write_sector(unsigned char drive, struct diskio *dio); |
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| 23 | |
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| 24 | #endif /* MYSTUFF_H */ |
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