48 lines
662 B
C
48 lines
662 B
C
#define USE_PORT_A
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#define RXADATA (int *) 0x01F800E0
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#define RXBDATA (int *) 0x01F800E4
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#define RXSTAT (int *) 0x01F800E8
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void
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outbyte (int c)
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{
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volatile int *rxstat;
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volatile int *rxadata;
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int rxmask;
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rxstat = RXSTAT;
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#ifdef USE_PORT_A
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rxadata = RXADATA;
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rxmask = 6;
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#else
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rxadata = RXBDATA;
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rxmask = 0x60000;
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#endif
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while ((*rxstat & rxmask) == 0);
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*rxadata = c;
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}
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int
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inbyte (void)
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{
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volatile int *rxstat;
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volatile int *rxadata;
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int rxmask;
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rxstat = RXSTAT;
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#ifdef USE_PORT_A
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rxadata = RXADATA;
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rxmask = 1;
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#else
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rxadata = RXBDATA;
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rxmask = 0x10000;
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#endif
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while ((*rxstat & rxmask) == 0);
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return *rxadata;
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}
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