void setchannel(int rw,int channel,int swi,int port);

rw==0 put settings

channel==0

swix(swi,port,byte,0)
we pass the port parameter to R0 call the swi number and pass the byte to be written to the swi, return -1 if not written

channel==1

call a script function defined as

int putbyte(int byte)

channel==2

serialdevput(byte,port)

block driver single byte write

channel==3

swix2(swi,port,(int)data,n)
we pass the port paramter to R0 call the swi number and pass a pointer to a buffer and number of bytes to read


channel==4

sdevblockwrite(putport,data,n)

block driver block write



rw==1 get settings

channel==0

swix(swi,port,0,0)
we pass the port paramter to R0 call the swi number and get a value back -1 indicating nothing read

channel==1

call a script function defined as

int getbyte(void);

return -1 for nothing, or the byte read.


channel==2

serialdevget(port)

block driver single byte read

channel==3

swix2(swi,port,(int)data,n)
we pass the port paramter to R0 call the swi number and pass a pointer to a buffer and max number of bytes to read, and get back number of bytes


channel==4

sdevblockwrite(putport,data,n)

block driver block read