/*
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/*
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* disk.h -- disk simulation
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* disk.h -- disk simulation
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*/
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*/
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#ifndef _DISK_H_
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#ifndef _DISK_H_
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#define _DISK_H_
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#define _DISK_H_
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#define SECTOR_SIZE 512 /* sector size in bytes */
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#define SECTOR_SIZE 512 /* sector size in bytes */
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#define DISK_CTRL 0 /* control register */
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#define DISK_CTRL 0 /* control register */
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#define DISK_CNT 4 /* sector count register */
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#define DISK_CNT 4 /* sector count register */
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#define DISK_SCT 8 /* disk sector register */
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#define DISK_SCT 8 /* disk sector register */
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#define DISK_CAP 12 /* disk capacity register */
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#define DISK_CAP 12 /* disk capacity register */
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#define DISK_STRT 0x01 /* a 1 written here starts the disk command */
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#define DISK_STRT 0x01 /* a 1 written here starts the disk command */
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#define DISK_IEN 0x02 /* enable disk interrupt */
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#define DISK_IEN 0x02 /* enable disk interrupt */
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#define DISK_WRT 0x04 /* command type: 0 = read, 1 = write */
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#define DISK_WRT 0x04 /* command type: 0 = read, 1 = write */
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#define DISK_ERR 0x08 /* 0 = ok, 1 = error; valid when DONE = 1 */
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#define DISK_ERR 0x08 /* 0 = ok, 1 = error; valid when DONE = 1 */
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#define DISK_DONE 0x10 /* 1 = disk has finished the command */
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#define DISK_DONE 0x10 /* 1 = disk has finished the command */
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#define DISK_READY 0x20 /* 1 = capacity valid, disk accepts command */
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#define DISK_READY 0x20 /* 1 = capacity valid, disk accepts command */
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#define DISK_DELAY 10 /* seek start/settle + rotational delay */
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#define DISK_DELAY_USEC 10000 /* seek start/settle + rotational delay */
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#define DISK_SEEK 50 /* full disk seek time */
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#define DISK_SEEK_USEC 50000 /* full disk seek time */
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#define DISK_STARTUP 1000 /* disk startup time (until DISK_READY) */
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#define DISK_START_USEC 1000000 /* disk startup time (until DISK_READY) */
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Word diskRead(Word addr);
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Word diskRead(Word addr);
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void diskWrite(Word addr, Word data);
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void diskWrite(Word addr, Word data);
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void diskReset(void);
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void diskReset(void);
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void diskInit(char *diskImageName);
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void diskInit(char *diskImageName);
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void diskExit(void);
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void diskExit(void);
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#endif /* _DISK_H_ */
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#endif /* _DISK_H_ */
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