| BUS_GETCX | 
  Reads the specified character value from the supplied bus memory, bus 
I/O, or POS address with built-in exception catching. | 
| BUS_GETLX | 
  Reads the specified long value from the supplied bus memory, bus I/O, or 
POS address with built-in exception catching. | 
| BUS_GETSX | 
  Reads the specified short value from the supplied bus memory, bus I/O, 
or POS address with built-in exception catching. | 
| BUS_PUTCX | 
  Writes the specified character value to the supplied bus memory, bus 
I/O, or POS address with built-in exception catching. | 
| BUS_PUTLX | 
  Writes the specified long value to the supplied bus memory, bus I/O, or 
POS address with built-in exception catching. | 
| BUS_PUTSX | 
  Writes the specified short value to the supplied bus memory, bus I/O, or 
POS address with built-in exception catching. |