Zack Buhman
10d17d3c98
This combines my iso9660 parsing code, with all of the prior gdrom packet interface / command code. The example, on real Dreamcast hardware, displays the first 2048 bytes [1] of every file in the root directory on the serial console. [1] or the size of the file, whichever is smaller
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
#include <cstdint>
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#include <cstddef>
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#include "type.hpp"
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struct gdrom_if_reg {
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const reg8 _pad0[24];
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union {
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const reg8 alternate_status;
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reg8 device_control;
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};
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const reg8 _pad1[103];
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reg16 data;
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const reg8 _pad2[2];
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union {
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const reg8 error;
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reg8 features;
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};
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const reg8 _pad3[3];
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union {
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const reg8 interrupt_reason;
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reg8 sector_count;
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};
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const reg8 _pad4[3];
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const reg8 sector_number;
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const reg8 _pad5[3];
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reg8 byte_count_low;
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const reg8 _pad6[3];
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reg8 byte_count_high;
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const reg8 _pad7[3];
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reg8 drive_select;
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const reg8 _pad8[3];
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union {
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const reg8 status;
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reg8 command;
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};
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uint16_t byte_count() const
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{
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return (byte_count_high << 8) | (byte_count_low << 0);
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}
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};
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static_assert((offsetof (struct gdrom_if_reg, alternate_status)) == 24);
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static_assert((offsetof (struct gdrom_if_reg, device_control)) == 24);
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static_assert((offsetof (struct gdrom_if_reg, data)) == 128);
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static_assert((offsetof (struct gdrom_if_reg, error)) == 132);
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static_assert((offsetof (struct gdrom_if_reg, features)) == 132);
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static_assert((offsetof (struct gdrom_if_reg, interrupt_reason)) == 136);
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static_assert((offsetof (struct gdrom_if_reg, sector_count)) == 136);
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static_assert((offsetof (struct gdrom_if_reg, sector_number)) == 140);
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static_assert((offsetof (struct gdrom_if_reg, byte_count_low)) == 144);
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static_assert((offsetof (struct gdrom_if_reg, byte_count_high)) == 148);
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static_assert((offsetof (struct gdrom_if_reg, drive_select)) == 152);
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static_assert((offsetof (struct gdrom_if_reg, status)) == 156);
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static_assert((offsetof (struct gdrom_if_reg, command)) == 156);
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extern struct gdrom_if_reg gdrom_if __asm("gdrom_if");
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