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