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hellwig |
/*
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* common.h -- common definitions
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*/
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#ifndef _COMMON_H_
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#define _COMMON_H_
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#define K 1024 /* Kilo */
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#define M (K * K) /* Mega */
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#define RAM_BASE 0x00000000 /* physical RAM base address */
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#define RAM_SIZE_MAX (512 * M) /* maximum RAM size */
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#define RAM_SIZE_DFL (4 * M) /* default RAM size */
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#define ROM_BASE 0x20000000 /* physical ROM base address */
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#define ROM_SIZE_MAX (256 * M) /* maximum ROM size */
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#define ROM_SIZE (256 * K) /* actual ROM size */
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#define IO_BASE 0x30000000 /* physical I/O base address */
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#define IO_SIZE_MAX (256 * M) /* maximum I/O size */
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#define IO_DEV_MASK 0x3FF00000 /* I/O device mask */
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#define IO_REG_MASK 0x000FFFFF /* I/O register mask */
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#define IO_GRAPH_MASK 0x003FFFFF /* I/O graphics mask */
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#define TIMER_BASE 0x30000000 /* physical timer base address */
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#define DISPLAY_BASE 0x30100000 /* physical display base address */
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#define KEYBOARD_BASE 0x30200000 /* physical keyboard base address */
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#define TERM_BASE 0x30300000 /* physical terminal base address */
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#define MAX_NTERMS 2 /* max number of terminals */
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#define DISK_BASE 0x30400000 /* physical disk base address */
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#define OUTPUT_BASE 0x3F000000 /* physical output device address */
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#define GRAPH_BASE 0x3FC00000 /* physical grahics base address */
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/* extends to end of address space */
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#define PAGE_SIZE (4 * K) /* size of a page and a page frame */
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#define OFFSET_MASK (PAGE_SIZE - 1) /* mask for offset within a page */
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#define PAGE_MASK (~OFFSET_MASK) /* mask for page number */
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#define INSTRS_PER_MSEC 1700 /* average execution speed */
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typedef enum { false, true } Bool; /* truth values */
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typedef unsigned char Byte; /* 8 bit quantities */
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typedef unsigned short Half; /* 16 bit quantities */
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typedef unsigned int Word; /* 32 bit quantities */
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#endif /* _COMMON_H_ */
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