18 lines
516 B
C
18 lines
516 B
C
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/* Addresses and magic numbers for miscellaneous ports. */
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#ifndef _PORTS_H
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#define _PORTS_H
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#if (CHIP == INTEL)
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/* Miscellaneous ports. */
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#define PCR 0x65 /* Planar Control Register */
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#define PORT_B 0x61 /* I/O port for 8255 port B (kbd, beeper...) */
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#define TIMER0 0x40 /* I/O port for timer channel 0 */
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#define TIMER2 0x42 /* I/O port for timer channel 2 */
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#define TIMER_MODE 0x43 /* I/O port for timer mode control */
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#endif /* (CHIP == INTEL) */
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#endif /* _PORTS_H */
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