root / lab4 / .minix-src / include / i386 / int86.h @ 14
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| 1 | 13 | up20180614 | #ifndef _INT86_H
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| 2 | #define _INT86_H
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| 3 | |||
| 4 | #if defined(__i386__)
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| 5 | |||
| 6 | # include <sys/types.h> |
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| 7 | |||
| 8 | /* registers used in an PC real mode call for BIOS services */
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| 9 | typedef struct reg86 { |
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| 10 | union {
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| 11 | /* 32-bit (double word [dword] or long word) access */
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| 12 | struct {
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| 13 | u32_t ef; /* 32-bit flags (output only) */
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| 14 | u32_t vec; /* Driver vector (input only) */
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| 15 | u32_t : 32; /* unused */ |
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| 16 | u32_t eax; /* 32-bit general register */
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| 17 | u32_t ebx; /* 32-bit general register */
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| 18 | u32_t ecx; /* 32-bit general register */
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| 19 | u32_t edx; /* 32-bit general register */
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| 20 | u32_t esi; /* 32-bit index register */
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| 21 | u32_t edi; /* 32-bit index register */
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| 22 | u32_t ebp; /* 32-bit pointer register */
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| 23 | }; |
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| 24 | |||
| 25 | /* 16-bit (word) access */
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| 26 | struct {
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| 27 | u16_t f; /* 16-bit flags (output only) */
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| 28 | u16_t : 16; /* unused */ |
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| 29 | u16_t off, seg; /* Driver vector (input only) */
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| 30 | u16_t ds, es; /* DS and ES real mode segment registers */
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| 31 | u16_t ax; /* 16-bit general register */
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| 32 | u16_t : 16; /* unused */ |
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| 33 | u16_t bx; /* 16-bit general register */
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| 34 | u16_t : 16; /* unused */ |
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| 35 | u16_t cx; /* 16-bit general register */
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| 36 | u16_t : 16; /* unused */ |
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| 37 | u16_t dx; /* 16-bit general register */
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| 38 | u16_t : 16; /*unused */ |
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| 39 | u16_t si; /* 16-bit index register */
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| 40 | u16_t : 16; /*unused */ |
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| 41 | u16_t di; /* 16-bit index register */
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| 42 | u16_t : 16; /* unused */ |
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| 43 | u16_t bp; /* 16-bit pointer register */
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| 44 | u16_t : 16; /*unused */ |
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| 45 | }; |
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| 46 | |||
| 47 | /* 8-bit (byte) access */
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| 48 | struct {
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| 49 | u8_t intno; /* Interrupt number (input only) */
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| 50 | u8_t : 8; /* unused */ |
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| 51 | u16_t : 16; /* unused */ |
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| 52 | u32_t : 32; /* unused */ |
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| 53 | u32_t : 32; /* unused */ |
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| 54 | u8_t al, ah; /* 8-bit general registers */
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| 55 | u16_t : 16; /* unused */ |
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| 56 | u8_t bl, bh; /* 8-bit general registers */
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| 57 | u16_t : 16; /* unused */ |
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| 58 | u8_t cl, ch; /* 8-bit general registers */
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| 59 | u16_t : 16; /* unused */ |
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| 60 | u8_t dl, dh; /* 8-bit general registers */
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| 61 | u16_t : 16; /* unused */ |
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| 62 | u32_t : 32; /* unused */ |
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| 63 | u32_t : 32; /* unused */ |
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| 64 | u32_t : 32; /* unused */ |
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| 65 | }; |
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| 66 | }; |
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| 67 | } reg86_t; |
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| 68 | |||
| 69 | #endif
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| 70 | |||
| 71 | #endif /* _INT86_H */ |