AnachronautandClaude Opus 5
8029063bdc
The rung between M3 and M4, and the point of doing it before the format: the engine learns the tracker's model with the tune still assembled in, so M4 becomes serialising a thing that exists rather than designing a thing that does not. A voice no longer walks one long track. 0xFF now means THIS SEQUENCE ended, and the voice takes the next address from an order list of its own. That is where repetition comes from, and it costs no notation: the bass plays the same sequence in the first bar and the last and it is written once. Per voice rather than one shared table of four-column rows, because a voice's order cursor is then a pointer it advances by itself - the same LDD and STD move everything else here makes. Four columns is how it reads, not how it is stored. Sequences also carry COMMANDS, which take no tick: the reader acts and reads the next event on the same boundary. One is defined, 0x80, which plays the rest of that voice on another patch, and the other 125 values are left alone. A patch change reshapes whatever is still ringing on the voice and nothing can be done about that - a channel has one set of parameters and a note in its release is using them - so it is a fact about the hardware and the cure is a rest, which is the composer's. The engine moved to Libraries/player.asm rather than being copied into the test a second time, now that it is big enough to drift. Play supplies the tune and the beat; the library supplies the scheduler, the patch loader and a voice's state. Verified by rendering: bar for bar identical across the move. AND THE TEST FOUND A REAL FLAW IN THE FORMAT, which is the whole argument for building the reader first. The order list ended with 0x0000, on the reasoning that no sequence could live below the 0x3000 this program is based at. True of a loaded program, false of a boot image whose data starts at zero - so the first test written against it read its own first sequence as the end of the list and played nothing at all. It is 0xFFFF now, which mirrors the 0xFF ending a sequence and is impossible everywhere: a sequence at 0xFF00 or above has fewer bytes left than it needs. An address is a poor place to hide a flag unless the address is impossible in every program, not just this one. One order list in the test now really ends, because otherwise nothing reached the terminator at all: every voice sat on a long rest and the break went unnoticed. With it, breaking the test reads garbage past the end and the counter sums two notes at 781 hertz. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW
134 lines
3.3 KiB
Plaintext
134 lines
3.3 KiB
Plaintext
CosmOS
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> monitor
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x examine, d disassemble, a assemble, s set, b bank, g go, exit leaves
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* b nonsense
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b <program|data|number>
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* b 9
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there is no such bank
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* load greet.sbx
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loaded, starting at 5000
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* b program
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bank 00
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* d 5000
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5000 47 00 30 00 SETD.0 3000
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5004 72 10 SWI 10
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5006 47 00 30 44 SETD.0 3044
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500A 72 10 SWI 10
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500C 47 00 30 7A SETD.0 307A
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5010 27 1F INIB 1F
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5012 72 11 SWI 11
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5014 47 00 30 5D SETD.0 305D
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* x 5000
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5000 47 00 30 00 72 10 47 00 30 44 72 10 47 00 30 7A G.0.r.G.0Dr.G.0z
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5010 27 1F 72 11 47 00 30 5D 72 10 47 00 30 7A 72 10 '.r.G.0]r.G.0zr.
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5020 47 00 30 65 72 10 20 72 12 00 00 00 00 00 00 00 G.0er. r........
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5030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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* b data
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bank 01
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* x 3000
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3000 61 20 70 72 6F 67 72 61 6D 2C 20 6C 6F 61 64 65 a program, loade
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3010 64 20 6F 66 66 20 61 20 64 69 73 6B 2C 20 72 75 d off a disk, ru
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3020 6E 6E 69 6E 67 20 6F 6E 20 74 68 65 20 73 79 73 nning on the sys
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3030 74 65 6D 20 74 68 61 74 20 6C 6F 61 64 65 64 20 tem that loaded
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* b 2
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bank 02
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* x 0
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0000 01 FF 00 00 00 00 00 00 01 FF 00 00 00 00 00 00 ................
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0010 03 FF 08 00 00 00 00 00 01 20 01 00 00 00 00 00 ......... ......
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0020 00 FF 00 00 00 00 00 00 00 FF 00 00 00 00 00 00 ................
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0030 00 FF 00 00 00 00 00 00 00 FF 00 00 00 00 00 00 ................
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* s 0 FF
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that bank will not be written
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* b program
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bank 00
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* s 8000 26 48 D1 00 26 0A D1 00 18 12
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* d 8000
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8000 26 48 INIA 48
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8002 D1 00 OUTA 00
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8004 26 0A INIA 0A
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8006 D1 00 OUTA 00
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8008 18 SHR
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8009 12 AND
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800A 00 ?
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800B 00 ?
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* g 8000
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H
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that byte is not an instruction, at 800A
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A 85 B 3F Q 05
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the program was stopped
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* d 8000
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8000 26 48 INIA 48
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8002 D1 00 OUTA 00
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8004 26 0A INIA 0A
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8006 D1 00 OUTA 00
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8008 18 SHR
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8009 12 AND
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800A 00 ?
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800B 00 ?
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* b data
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bank 01
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* s 8100 68 65 6C 6C 6F 2C 20 74 79 70 65 64 0A 00
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* b program
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bank 00
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* a 8200
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8200: SETD.0 8100
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8204: SWI 10
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8206: lda.2
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8208: LDD.0.1
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820B: frobnicate
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no such instruction
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820B: INIA
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that one needs a value after it
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820B: SWI 12
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820D: .
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* d 8200
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8200 47 00 81 00 SETD.0 8100
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8204 72 10 SWI 10
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8206 42 02 LDA.2
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8208 4A 00 01 LDD.0.1
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820B 72 12 SWI 12
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820D 00 ?
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820E 00 ?
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820F 00 ?
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* g 8200
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hello, typed
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finished
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* exit
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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 9201
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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 892
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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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> exit
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halted
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Execution halted.
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[exit 0]
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