The following articles were printed in Numbers 14/15 of October/November 1984 of the magazine „The Computer Journal"
A series about programming the Hayes Micromodem II — indeed for the 6502 (Apple II+) but not Z80.
(I published this program although it is not for the proper CPU because the "Terminal-Emulator" issue may be of interest for other CPUs.
Please note the unusual detailed description of the program!)

Controlling the Hayes Micromodem II from Assembly Language

by Jan Eugenides

Part 1

  • Dialing the Phone
  • Modem Registers
  • Incoming Data
  • A Note About Lower Case
  • Sending From the Keyboard
  • The Command Handler
  • The Capture Buffer
  • Next Time

Part 2

  • The Equates
  • Initialization
  • Saving The Buffer
  • Cataloging The Disk
  • Reviewing The Buffer
  • Filling Up The Buffer
  • The Input Routine
  • The Print Routine
  • Uploading From Disk
  • How To Use Big Buff
  • Possible Uses
  • Next Time

Scanned by Werner Cirsovius
December 2015
© The Computer Journal