Learn FORTH on the VIC-20
We'll take a quick tour of the FORTH language on the VIC-20 by writing a colorized Hello World application.
We will then port the code to the C64 version of FORTH.
The cartridge ROM and PDF Manual can be found here:
https://www.zimmers.net/anonftp/pub/c...
How to launch VIC Forth within VICE:
File then Attach Cartridge Image
Change the dropdown in the bottom right of the dialog from .CRT to .
Choose the hes-vic-forth.rom file (Single click, dont double click it)
Change the cartridge type dropdown to Generic
Then click Attach
Timeline:
0:00 Intro
0:50 Word
1:24 CR Carriage Return
1:49 Dot Quote
3:05 Error Messages
4:00 Defining Words
5:22 The Dictionary
6:52 The Stack
9:11 Emit
10:20 Constants
11:42 Memory Layout
12:14 Multiplication
13:19 The Editor
14:46 Comments
18:00 Run the program
18:21 Saving to tape
19:20 Loading from tape
20:13 Do loops
22:26 Reading the Jiffy Clock
24:20 ANDing values
25:41 Generate a random number 0-7
27:42 Working with Color RAM
29:48 Using indexes in DO loops
33:50 A colorful Hello World
34:30 Porting it to the C64
36:52 Saving to disk
37:55 Quick preview of the C64 Version
39:00 Closing
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