Week 12 Friday-- MAE 412
Lecture:
- Note: The following topic may have already been covered.
- Addressing Modes for 6502 Assembly Language
- Real-time issues -- Delay, Latch, Handshake
- Delay: Speed of Relay (Careful when relays are used in
conjunction with RR switches -- the relays don't respond instantaneously)
- Latch: Use /R/S Flip-Flop to Capture Transient Events
- Handshake: Use Handshakes to Guarantee Synchronization
- Programming Tips -- Flag to Test Sensors without Trapping
Flow, FRANUM to force synchronization with track voltage
- Interactive Control - Demo and Flow Charts
- Block Override ('Protect a Block') - Demo and Discussion
- Forced Block Clear ('Release of Block') - Demo and Discussion
- Computer Architecture (Harvard vs. Princeton)
- Final Reports
Assignments and Reference Material:
-
For information about the Interrupt Service Routine read
Chapter 5 on Communications by Gurion and Simon in Volume 1 of the On-line
Text.
-
For information about the Bar-Code Reader, RR Signal Control,
and Interlocking Control (Track Kill) read Chapter 6 on Block Management
by Lecky and Fiderer in Volume 1 of On-line Text.
-
Read Chapter 2 of Volume 1 of the On-line Text ("Hornby
Railways ...")
-
Document your working computer using ORCAD (see example
on CIRCUITS page) -- Hand in next Tuesday (include 74LS244 buffer).
-
Read Chapter 3 of CST -- available on-line (go to BLACKBOARD
=> LIBRARY => e-reserves => authentication page => user:mae412 password:littman1).
Continue studying the 6502 instruction set.