Chapter 13.0: Straits -- Getting Julia Booted Up
Chapter 13.1: Straits -- Bringing Up Flex
Denny called about the time we were wrapping up, and Julia got on the extension in Dad's study to say hi. It seemed it would be appropriate to make a run to Austin the next weekend, and to leave immediately after our last morning classes so I could visit with some of the management at Motorola Friday evening.
"You, know," Julia said, "if I went with, maybe I could look for floppy disk drives at that surplus shop on Saturday before coming back."
Denny checked with Denise, and they decided Julia could sleep on the couch in the living room and I could sleep on the floor in a sleeping bag in the boys' room. Julia's parents said they thought it would be okay, and Mom and Dad suggested we pray about it.
Which we did. No one felt inspired to object, so
Julia suggested she go with me, so she could go looking for her own disk drives, and Denny and Denise bo
Talk about duty cycle and mention DtoA as a way to adjust brightness.
Watching the students work on the keyboard and keypad matrix decoding, became clear to me that, while the bit I/O instructions might be useful for certain singular, non-generalized kinds of code, a keyboard or keypad matrix contained a lot of repeated elements. Ultimately, shifts and logical instructions would provide the more general scalable solution.
After about a half hour of
I stood up and demonstrated the concept of a state array for the matrix, then suggested we put it on a back burner and look at the seven-segment LED displays. This time, the bit I/O instructions were ignored, and several groups formed around defining an array of the segment patterns for each integer. Some of the students wanted to turn the translation array upside down for some reason, but I didn't stop them.
Suzanne's and Winston's and Winston's mainboards were both up enough to display the TV-BUG prompt by this point, and the four of them joined the rest on the keyboard/trainers.
Since Flex was running on my Micro Chroma 68, I was able to load the cross-assembler, and we had several students burn code into their 68705s for testing before time to shut down.
Even as productive as the session was, no one got their s
Mike kept trying to work out how to set the keyboard state up as an array, but he couldn't seem to quite pin it down.
M
*****
"Floppies multiplying like rabbits," I grumbled.
She laughed.
Julia returned to working on her keyboard/trainer, while I dug back into my test routines. Shortly, I thought I had
tendency to idealize/idolize foreign
Chapter 13.2: what?
[Backed up at https://joel-rees-economics.blogspot.com/2020/06/bk-33209-straits-bringing-up-flex.html.]
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Keep it on topic, and be patient with the moderator. I have other things to do, too, you know.