Micro 6502 - Issue 64 - September 1983

• Turtle Graphics for the VIC-20 and C64 - Insights from the author of these educational packages
• Text Compression and Encryption - Save memory and increase the strength of your code
• Using VIC and C64 ROM Routines from BASIC - Save machine-language programs from BASIC without a monitor!
• Using Signed Arithmetic on the 6502 - A technique to overcome the problem of missing signed comparisons
• Machine-Language Input Routines for Commodore Computers - Input both string and numeric data to your Commodore