Page 131 - The Unofficial Guide to Lego Mindstorms Robots

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This is the same as the previous example, except the 2 is now a 3. The 3 tells pbFORTH to turn the output off. I'll get to the
details of MOTOR_SET later, after I've introduced you to the Forth language itself.

Make sure you separate everything with spaces. pbFORTH reads different words by assuming that they're all separated by
w hitespace, either spaces or returns. If you miss a space, pbFORTH will get confuse d and complain that it can't find a word
definition.

pb FORTH is also case sensitive. While MOTOR_SET is a defined word, Motor_Set is not, nor is motor_set or
MOTOR_SEt.

Sending Fil es

For serious developm ent, you'll want to create your source code in a text file and send the whole file to pbFORTH when you're
r eady to test. You c an do this with many terminal emulators, although you have to set it up correctly.

First, the terminal emulator needs to know how long to wait after sending each character. In HyperTerminal (in Windows 95,
98, or NT), this setting is available in the File > Properties menu option. In the window that appears, choose the Settings tab
and press the ASCII Setup button. You should set the Line delay to 100 milliseconds and the Character delay to 20
milliseconds, as shown in Figure 6-2.

Figure 6-2.
Setting character delays for sending files

To upload a fil e to pbFORTH, choose Transfer → Send Text File from the menu.