COSMAC ELF

Ipso Facto Issue 20

• A Floppy Disk Controller for the 1802
• Enhancements to UT4
• Programmable Sound Generator for 1802 Systems
• UART to TTY, to TTY Keyboard to UART, Video Sync Driver
• Frequency Counter
• ELF II Cassette I/O
• Handshaking the Xitex Video Terminal
• Routine to Save Registers for Debugging
• More Basic Bugs
• 16 Key Keyboard Interface
• The Monitor Version II
• Home Brew of Printed Circuit Boards
• Byte Search

Ipso Facto Issue 21

• Hints and Fixits
• Danger — Electricity Can Kill You
• Simulated Word Instructions for the 1802
• Full Basic for the 1802 (Really!)
• Thoughts on a Simple Floppy Disk I/O System
• Text Finder and Disassembler for the 1802
• Editor/Assembler/Monitor for Video
• ELF II Serial Interface
• Recycling the Netronics Math Board
• Hardware Ramblings
• Errata
• Introduction to the Association of Computer Experimenters

Ipso Facto Issue 22

• A Software Floating Point Math Package
• Floppy Disc Controller
• Netronics Text Editor to Tiny Basic Conversion
• Test Your Reflex
• Memory Mapping the 1851
• Forth Anyone?
• 1802 Support
• Errata: Ipso Facto # 20
• Funny Stuff

Ipso Facto Issue 23

• Errata: The Monitor Version II
• The Text Editor
• Modifications to the Club VDU Board
• Status Display
• Netronics Tiny Basic for All 1802 Systems
• ELF II Serial I/O Package
• EPROM Programming With an 1802

Ipso Facto Issue 24

• 1802 Logic Analyzer
• Design Your Programs to Run at Any Page Boundary
• 1802 Code Editor
• Odds and Ends
• Hex to Decimal Conversion
• XOR Testing
• Video Interface for MC6847
• Centronics Printer Interface
• Baseball
• Program Your Sounds

Ipso Facto Issue 25

• Of This and That
• Roll Over Hex on the ELF II
• Netronics Monitor Cassette Problems
• Modifications to Ed McCormick’s Monitor
• CTL: The Fairly New Full Basic Command from Netronics
• Simon ELF Update
• Netronics Video Board Test Program
• ELF II Cassette Hardware Modifications
• Addendum: Mantei 2716 EPROM Programmer
• Memory Test Program
• Kingdom: A Tiny Basic Simulation Game
• Quest Basic Printer Routine
• Ratrace 1: A Simulation Game in Quest Super Basic Version 3.0
• 1802 Serial I/O Board

Ipso Facto Issue 26

• Comments on Self-Relative Code
• The Expanded 1805 and 1806 Instruction Set
• Useful Routines
• Proposed Register Conventions
• Stack Handling Technique
• Tiny Pilot Programs
• Kaleidoscope
• 1861 Inverting Routines
• Improved Mastermind Program
• More Device Drivers for The Monitor
• Solving the Schrodinger Equation with the Super ELF