AnachronautandClaude Opus 5
87467a7d3a
run does not reload, and that is right: run's job is to run the program that is loaded, which is why it is a separate word from load and why typing a program's name does both. What follows is that the numbers the assembler wrote into a Data Segment are LOAD-time values, true once, and a program that wants them true at every start has to say so itself. Lander did not. Flying is 0x01 in the data and is only ever cleared, so a second run began with the loop already over: the program started and handed the machine straight back. Reproduced by running it, quitting, and running again - the leftover game keys land at the shell prompt, which is what a program that never read them looks like. AND THE TEST FOUND A SECOND ONE, quieter and worse. The terrain seed is a written number, so a fresh load always walks out the same moon - but nextRandom moves it, and a second run generated a DIFFERENT moon. Nobody decided that. A test comparing the whole screen found it without anybody having had to think of it in advance, which is the argument for comparing the picture rather than the variables somebody remembered to check. Only what a flight needs to begin is put back. Anything not on the list keeps what the last run left it, which is deliberate - state surviving a run is sometimes exactly what is wanted, and the way to have that is for the list to be a decision rather than a sweep. The things that are simply nought are a table of NAMES that the assembler turns into addresses, so adding a variable that must start empty means adding it there and nowhere else. video.sh now runs Lander, quits, runs it again, and requires the same picture a hundred frames in - the same moon, the same lander in the same place, the same gauges. break.sh confirms it by taking the seed line back out: 37,995 bytes of the picture differ. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW
59 lines
1.4 KiB
Plaintext
59 lines
1.4 KiB
Plaintext
CosmOS
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> run
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nothing is loaded
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> dir
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greet.sbx 211
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hello.sbx 53
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Life.sbx 1396
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Snake.sbx 2164
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Keys.sbx 664
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Say.sbx 156
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Break.sbx 149
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Grid.sbx 571
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Press.sbx 872
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Mode.sbx 48
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Flip.sbx 173
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Sprite.sbx 442
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Depth.sbx 672
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Lander.sbx 9361
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Pad.sbx 264
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Crash.sbx 632
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vars.script 50
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blocks.script 343
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loops.script 272
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tune.sbx 318
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Play.sbx 2525
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notes.txt 21
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Apps <dir>
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hi.script 121
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bad.script 45
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plain.script 24
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cross.script 280
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nonl.script 38
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outer.script 376
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inner.script 44
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loop.script 35
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30 files, 1 directory
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> load
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load what?
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> load nosuch.sbx
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no such file
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> load notes.txt
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not a program
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> load greet.sbx
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loaded, starting at 5000
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> run
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a program, loaded off a disk, running on the system that loaded it
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what should I call you? Anachronaut
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hello, Anachronaut. that is all I do.
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finished
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> run
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a program, loaded off a disk, running on the system that loaded it
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what should I call you? Claude
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hello, Claude. that is all I do.
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finished
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> exit
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halted
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Execution halted.
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[exit 0]
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