Forty-five down, twenty to go. For those unfamiliar, that’s what the title means: starting weight, current weight, goal weight. I lost the first 35 pretty steadily over 2017, then stalled for most of the first half of this year, and now the scale is moving again. Stalls happen; the main thing is not to start gaining it back. My goal of 200 is based on calculations using wrist size to determine lean mass (bone and muscle).
This video introduces the 56 op-codes in the 6502 assembly language instruction set, and gives examples of the commonly used ones, using a Commodore 128 monitor. Here’s the list of op-codes divided up by function. This is the third video in my ongoing 6502 assembly language series. If you’re not familiar with the 6502 hardware, or with binary math and bitwise operations, check out the two previous videos in the series for info on those.
There are some grammar mistakes that I see at least daily these days, more often than you’d think possible. I thought I’d use a few for blog fodder, and maybe it can be a resource. Buckle up for hardcore grammar nerdery. The reason….is….because…. For instance, “The reason I won the blue ribbon is because my cabbage was the biggest.” This is always wrong. It’s hard to explain why if you don’t know how to diagram sentences; but basically, you need a noun clause to be the thing the reason is, and noun clauses don’t start with “because.
I studied biology a couple years ago. I guess I mostly slept through it in high school, because I sure didn’t remember much. When we got to the section on DNA, I was like, “Holy shit, it’s a computer program!” DNA isn’t just roughly analogous to programming; it’s basically the same thing. When a living cell needs to produce something, the nucleus cuts-and-pastes a string of instructions out of DNA, picking the right short chunk out of a string billions long.
I’ll be doing videos to demonstrate the 6502 instructions soon, and you can’t understand several of them without a basic understanding of binary math. It’s not hard, but it’s something that isn’t taught in math classes anymore, or is touched on as a concept but not really absorbed. This video demonstrates how to write binary numbers and translate them to decimal, how to add them, and how to convert to hexadecimal (base 16).
Still watering quite a bit, though there was one small rain a week ago. Harvesting snap beans, Swiss chard, and a few potatoes. There will be scalloped summer squash and cucumbers along very soon. Got most of the late garden planted, with turnips, radishes, beets, carrots, and a few other things.
Almost time for the Adams County Fair! It doesn’t look like I’ll be exhibiting anything, since the only thing in the garden that looks good right now is the Swiss chard, and there’s no Swiss chard category. It would wilt before it could be judged anyway. But I’ll be there for dairy judging on Saturday morning, at least. That’s always a good time, watching cows drag kids around the ring. I saw the heifers they were trimming up and getting ready to go, and they looked great, not that I’m much of a dairy judge.
I plan to do some demonstrations of assembly language programming, so I thought I’d do a short intro. This is about the 6502 family of microprocessors, which were used in many computers of the 1980s, and are still produced by the millions for embedded hardware and hobby projects. The 6502 is a pretty easy CPU to program, because it has a fairly small set of instructions, and yet it’s powerful enough to do interesting things.
I was telling someone the other day that every computer I’ve bought has cost about $700-800, even though they keep getting more powerful. You can spend a lot more than that, of course. But it seems like each time I put together a system with current proven hardware that’s plenty powerful for my needs, the price ends up in that range, going back to my first computer in 1988. Then I got to wondering whether that’s really true.
If I wear a hat doing work out in the yard, I usually wear a baseball cap style hat, as is common around here. But the other day a few of my hats fell apart in the laundry, they were getting so worn. So while I was at Farm & Home getting feed, I thought I’d look at hats. The first one – just an ordinary baseball cap – was $30.