claunia/86Box
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Rewritten parts of the 86F handler to minimize false CRC errors and misidentification of sectors;

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Replaced IMG handler with one that now proxies to the 86F handler;
Applies the remaining Mainline PCem speedup commit;
Fixed the National Semiconductors PC87306 Super I/O Chip's serial port IRQ assignment;
DMF images are now loaded with the correct sector interleave, improving read/write speed;
XDF images are now loaded in a way that emulates the real order of the sectors on the track, improving read/write speed;
Added 16-bit physical memory read/write routines (mem_phys_readw, mem_phys_writew) and modified the 16-bit DMA code to use them instead of two 8-bit reads/writes.
This commit is contained in:
OBattler
2016-09-22 21:22:56 +02:00
parent 0ae428b5f5
commit 6318e2bb17
24 changed files with 1688 additions and 513 deletions
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31
src/disc.h
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@@ -108,3 +108,34 @@ extern int drive_type[2];
#define BYTE_TYPE_AM 0x03
#define BYTE_TYPE_DATA 0x04
#define BYTE_TYPE_CRC 0x05
typedef union {
uint16_t word;
uint8_t bytes[2];
} crc_t;
void disc_calccrc(int drive, uint8_t byte, crc_t *crc_var);
typedef struct
{
uint8_t (*disk_flags)(int drive);
uint8_t (*side_flags)(int drive);
void (*writeback)(int drive);
void (*set_sector)(int drive, int side, uint8_t c, uint8_t h, uint8_t r, uint8_t n);
uint8_t (*read_data)(int drive, int side, uint16_t pos);
void (*write_data)(int drive, int side, uint16_t pos, uint8_t data);
int (*format_conditions)(int drive);
uint8_t check_crc;
} d86f_handler_t;
d86f_handler_t d86f_handler[2];
void d86f_common_handlers(int drive);
int d86f_is_40_track(int drive);
uint8_t* d86f_track_data(int drive, int side);
uint8_t* d86f_track_layout(int drive, int side);
uint16_t d86f_prepare_pretrack(int drive, int side, int iso, int write_data);
uint16_t d86f_prepare_sector(int drive, int side, int pos, uint8_t *id_buf, uint8_t *data_buf, int data_len, int write_data, int gap2, int gap3);