Last change
on this file since 20 was 4, checked in by Mattia Monga, 14 years ago |
Importazione sorgenti libro
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File size:
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1 | /* Addresses and magic numbers for miscellaneous ports. */
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2 |
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3 | #ifndef _PORTS_H
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4 | #define _PORTS_H
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5 |
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6 | #if (CHIP == INTEL)
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7 |
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8 | /* Miscellaneous ports. */
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9 | #define PCR 0x65 /* Planar Control Register */
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10 | #define PORT_B 0x61 /* I/O port for 8255 port B (kbd, beeper...) */
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11 | #define TIMER0 0x40 /* I/O port for timer channel 0 */
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12 | #define TIMER2 0x42 /* I/O port for timer channel 2 */
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13 | #define TIMER_MODE 0x43 /* I/O port for timer mode control */
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14 |
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15 | #endif /* (CHIP == INTEL) */
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16 |
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17 | #endif /* _PORTS_H */
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