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N: SIO Command $2C Change Directory

Bill Kendrick edited this page May 27, 2022 · 2 revisions

N: SIO Command Change Directory ($2C)

This is a command for Devices $71-$78 - The N: Device (see SIO-Commands-for-Device-IDs-$71-to-$78).

Description

Sets the PREFIX of the selected N: device. This is a string that is pre-pended to any devicespec sent to e.g. OPEN or SPECIAL commands.

So if PREFIX was set to

HTTP://35.239.67.240/

then an OPEN call containing

N:BURIEDBU.COM

would be translated to:

N:HTTP://35.239.67.240/BURIEDBU.COM

It is possible to clear the prefix by sending either a completely zeroed buffer, or a buffer containing a single EOL ($9B)

Parameters

DCB Value
DDEVIC $71
DUNIT $01 - $04
DCOMND $FE
DSTATS $80
DBUF NULL
DTIMLO $0F
DBYT 256
DAUX1 Any AUX1 bits to OR
DAUX2 Any AUX2 bits to OR

Examples

CC65

void nprefix(void)
{
  int i;

  OS.dcb.ddevic=0x71;
  OS.dcb.dunit=1;
  OS.dcb.dcomnd=0xFE;
  OS.dcb.dstats=0x80;
  OS.dcb.dbuf=&buf;
  OS.dcb.dtimlo=0x1f;
  OS.dcb.dbyt=256;
  OS.dcb.daux1=daux1;
  OS.dcb.daux2=daux2;
  siov();

  if (OS.dcb.dstats!=1)
    {
      err_sio();
      exit(OS.dcb.dstats);
    }
}

See Also

Put other related command links here.

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