AnachronautandClaude Opus 5
ca243895ca
cosmos.img was 256 blocks and two directory blocks: 64K, sixteen files. Ample for a disk that held nothing but programs, and not enough for the thing that comes next. The native assembler reads SOURCE from this disk, and the CosmOS sources alone are 104,142 bytes against the 65,536 a 256 block disk holds - so the machine could not hold its own source code. 2048 blocks and four directory blocks: 512K and room for 32 files. Nothing was recorded that had to change, which is worth saying rather than assuming: dir lists names and does not report free space, so no golden file names a block count. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW
163 lines
9.2 KiB
Bash
Executable File
163 lines
9.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Builds the disk images the tests read from.
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#
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# These are made with SplitDisk, which is the other implementation of the same format.
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# That is the point of them: a SplitBit program reading one of these is being checked
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# against something written by different code from a written specification, rather than
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# against itself.
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#
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# Written by Anachronaut
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set -eu
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BUILD="$1"
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ROOT="$(cd "$(dirname "$0")/.." && pwd)"
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TOOL="$ROOT/SplitDisk"
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DISKS="$BUILD/disks"
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WORK="$BUILD/.diskwork"
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[ -x "$TOOL" ] || { echo "SplitDisk is not built."; exit 1; }
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mkdir -p "$DISKS" "$WORK"
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# Two directory blocks, so that a file can be put beyond the first one and the walk from
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# block to block gets exercised rather than assumed.
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"$TOOL" format "$DISKS/sbfs.img" 64 2 >/dev/null
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cd "$WORK"
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printf 'hello from a file' > greeting.txt
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# Eight files fill the first directory block exactly, so everything after this lands in
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# the second one.
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for i in 1 2 3 4 5 6 7 8; do printf 'filler %d' "$i" > "filler$i.txt"; done
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# Longer than a block, so reading it has to cross from one to the next. The pattern
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# repeats every twenty six bytes, which makes a misplaced block obvious to read.
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awk 'BEGIN { for (i = 0; i < 700; i++) printf "%c", 65 + (i % 26) }' > across.txt
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: > empty.txt
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printf 'exactly twenty two!!!!' > longname.txt
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"$TOOL" put "$DISKS/sbfs.img" greeting.txt >/dev/null
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for i in 1 2 3 4 5 6 7 8; do "$TOOL" put "$DISKS/sbfs.img" "filler$i.txt" >/dev/null; done
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"$TOOL" put "$DISKS/sbfs.img" across.txt >/dev/null
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"$TOOL" put "$DISKS/sbfs.img" empty.txt >/dev/null
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"$TOOL" put "$DISKS/sbfs.img" longname.txt aName22CharactersLong! >/dev/null
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# A disk with a loadable program on it. The program is assembled here rather than kept as
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# bytes, so that what gets loaded is always built from the source beside it.
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"$TOOL" format "$DISKS/load.img" 64 2 >/dev/null
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# The assembler writes a loadable program itself, because the source says where it goes.
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"$ROOT/Assembler" "$ROOT/Programs/loadable/hello.asm" -o "$WORK/hello.sbx" >/dev/null
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"$TOOL" put "$DISKS/load.img" "$WORK/hello.sbx" >/dev/null
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# A disk for CosmOS. greet.sbx asks the system for everything it does rather than talking
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# to the hardware itself, so loading and running it exercises the whole path: the loader,
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# the vector table, the service handlers, and giving the machine back at the end.
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#
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# hello.sbx is the opposite case, and that is why it is here: it is the original
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# hello.asm, written before any of this existed, and it still writes straight to port
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# 0x00 rather than calling osPrintString. A program is allowed to reach past the system
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# to the hardware, so something has to check that one still gives the machine back.
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#
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# notes.txt is there so that loading something that is not a program can be tried too.
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# 512K, and four directory blocks for 32 files. It was 64K and 16, which was ample for a
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# disk that held programs and nothing else - but the native assembler reads SOURCE from
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# here, and the CosmOS sources alone are 104,142 bytes against the 65,536 a 256 block disk
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# holds. A machine that is going to assemble itself has to be able to hold its own source.
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"$TOOL" format "$DISKS/cosmos.img" 2048 4 >/dev/null
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"$ROOT/Assembler" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/greet.asm" -o "$WORK/greet.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/greet.sbx" >/dev/null
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# Assembled to a different working name so it cannot tread on load.img's hello.sbx above,
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# then put under the name the shell asks for.
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"$ROOT/Assembler" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/hello.asm" -o "$WORK/appHello.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/appHello.sbx" hello.sbx >/dev/null
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# Life.sbx is the one that had to be taught to stop. It runs to a still life and returns
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# on its own, so the test needs no cycle limit: whether it ends is the thing being checked
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# and a limit would hide the answer by supplying one.
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"$ROOT/Assembler" -I "$ROOT/Programs/Libraries" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Life.asm" -o "$WORK/Life.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/Life.sbx" >/dev/null
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# Snake.sbx is the one that is played rather than watched. It reads the console a key at a
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# time without ever waiting for one, so a script of moves drives it a move to a frame, and
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# what is recorded is a whole game: turning, eating, growing, and running into a wall.
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"$ROOT/Assembler" -I "$ROOT/Programs/Libraries" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Snake.asm" -o "$WORK/Snake.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/Snake.sbx" >/dev/null
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# Keys.sbx brings a vector of its own, which is what the version two format exists for. It
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# is the only program here the system has to install anything for, so it is what says the
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# whole path works: written into the file, installed at run, taken back out at exit.
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"$ROOT/Assembler" -I "$ROOT/Programs/Libraries" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Keys.asm" -o "$WORK/Keys.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/Keys.sbx" >/dev/null
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# Say.sbx is the first program that can be told anything. Everything before it did the same
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# thing however it was started.
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"$ROOT/Assembler" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Say.asm" -o "$WORK/Say.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/Say.sbx" >/dev/null
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# Break.sbx stops itself twice and shows what the registers were each time. It needs no disk
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# of its own: it only prints.
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"$ROOT/Assembler" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Break.asm" -o "$WORK/Break.sbx" >/dev/null
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"$TOOL" put "$DISKS/cosmos.img" "$WORK/Break.sbx" >/dev/null
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printf 'this is not a program' > notes.txt
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"$TOOL" put "$DISKS/cosmos.img" notes.txt >/dev/null
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# A disk of its own for the writing test, with one file already on it so that what it
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# writes has to be placed somewhere that does not tread on what is there.
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"$TOOL" format "$DISKS/write.img" 32 1 >/dev/null
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printf 'already here' > here.txt
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"$TOOL" put "$DISKS/write.img" here.txt >/dev/null
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# A disk of its own for the editing test, which deletes and renames things and would
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# otherwise leave the writing test's disk looking nothing like the writing test expects.
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# It starts with one file on it so that a document written here has to be placed around
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# something, and so that the disk can be compared afterwards against one that never had
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# any of it: the metadata should come back exactly as it was.
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"$TOOL" format "$DISKS/edit.img" 32 1 >/dev/null
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"$TOOL" put "$DISKS/edit.img" here.txt >/dev/null
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# A disk for the shell's delete and rename, which is its own because those change what is
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# on it. A fixture whose name has a directory in it is used as it stands rather than being
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# made fresh per test, so a test that writes to a shared one would quietly change what
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# every test after it sees.
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"$TOOL" format "$DISKS/files.img" 32 1 >/dev/null
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printf 'the first one' > one.txt
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printf 'the second one' > two.txt
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"$TOOL" put "$DISKS/files.img" one.txt >/dev/null
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"$TOOL" put "$DISKS/files.img" two.txt >/dev/null
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# A disk for the editor, holding nothing but the editor. Its own, because the whole point
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# of it is that it writes: a document made on a shared fixture would turn up in the file
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# listing of every test that came after it.
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"$TOOL" format "$DISKS/editor.img" 256 2 >/dev/null
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"$ROOT/Assembler" -I "$ROOT/Programs/Libraries" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Edit.asm" -o "$WORK/Edit.sbx" >/dev/null
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"$TOOL" put "$DISKS/editor.img" "$WORK/Edit.sbx" >/dev/null
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# A disk for the file services, holding nothing but the program that exercises them. Its
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# own, because that program writes: it tidies up after itself, but a run that stopped part
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# way would leave a document behind on a fixture every later test reads.
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"$TOOL" format "$DISKS/services.img" 256 2 >/dev/null
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"$ROOT/Assembler" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Files.asm" -o "$WORK/Files.sbx" >/dev/null
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"$TOOL" put "$DISKS/services.img" "$WORK/Files.sbx" >/dev/null
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# A disk for streaming, and the only one here that has to be big: the file on it is bigger
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# than the machine's Data Memory, which is the entire point of the services it checks.
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#
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# THE FILE IS GENERATED RATHER THAN TAKEN FROM THE REPOSITORY. Concatenating the CosmOS
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# sources would be a truer picture of what streaming is for, and would change the recorded
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# checksum every time a line of CosmOS was edited - so a real difference would arrive in a
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# crowd of meaningless ones, which is the same trap the cycle counts used to set. This is
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# 84000 bytes, which is 328 whole blocks and 32 bytes over, so the short block at the end
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# is exercised rather than assumed.
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"$TOOL" format "$DISKS/stream.img" 1024 2 >/dev/null
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awk 'BEGIN { for (i = 0; i < 4000; i++) printf "streaming line %05d\n", i }' > big.txt
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awk 'BEGIN { for (i = 0; i < 50; i++) printf "small %05d\n", i }' > small.txt
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"$TOOL" put "$DISKS/stream.img" big.txt >/dev/null
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"$TOOL" put "$DISKS/stream.img" small.txt >/dev/null
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"$ROOT/Assembler" -I "$ROOT/Programs/CosmOS/Source" \
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"$ROOT/Programs/CosmOS/Apps/Stream.asm" -o "$WORK/Stream.sbx" >/dev/null
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"$TOOL" put "$DISKS/stream.img" "$WORK/Stream.sbx" >/dev/null
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