Multiple parameters

Consider an mnemonic with multiple parameters. Prior to Comet 504, the following hex write control was used to create a window in Internet Basic:

     "@0E0D00wwxxyyzz@"

where: ww and xx are the Y and X coordinates of the upper left corner of the window, and yy and zz are the Y and X coordinates of the lower right corner (ww, xx, yy, and zz are in hex)

Signature Systems created a mnemonic for this same objective. The following mnemonic contains 4 arguments:

     (Create Window=ww,xx,yy,zz)

The driver library entry for this mnemonic is:

     [Create Window=ARG1,ARG2,ARG3,ARG4]
     Print "@0E0D00@"
     Printhex ARG1
     Printhex ARG2
     Printhex ARG3
     Printhex ARG4
     Print "@00@"

Notice how the 4 numeric arguments are listed on the first line. Also notice the use of the PRINTHEX command within the definition. This statement converts a decimal argument to its hex equivalent (e.g., PRINTHEX 20 would convert the 20 decimal to 14 hex).

The final line of the definition prints a null in order to suppress blank stripping during a formatted WRITE.