AnachronautandClaude Opus 5
3449405b18
CosmOS had 1,161 bytes of Program Memory left before the address applications load at, and Tab completion is not going to fit in that with anything to spare. So the wall moves up one page: the system keeps below 0x4FFF and 0x2FFF, and an application is based at 0x5000 and 0x3000. A PAGE IS A CHEAP THING TO GIVE IT AND AN EXPENSIVE THING TO RUN OUT OF. An application still has 44K of Program Memory before the vector table and the largest one here uses 7.5K, so what was taken from applications is space nothing has ever asked for - while what the system gained is the difference between building the next thing and counting bytes while building it. Not doubling, which was the version that would have cost application space worth minding. One page, and the same again when it is needed. Nothing in the machine knows where the wall is, so this is 34 #Base lines, one threshold in the fault handler, and the table in the CosmOS README that Tests/docs.sh reads its limits out of. The native assembler's scratch map had to move with it, and docs.sh said so before anything ran: its data reached 0x40D6 and its buffers began at 0x4000, so they were sitting on its variables. That file already carries a paragraph about the floor coming up and the map staying where it was. It has happened twice now, and been caught by a check the first time wrote. Twenty three recordings are the same runs a page higher. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW
59 lines
1.1 KiB
NASM
59 lines
1.1 KiB
NASM
; A program that is told what to work on.
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;
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; Everything loaded before this one did the same thing however it was started, because
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; there was no way to tell one anything. A tool that edits a document needs to know which
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; document, and that is the same need a dozen other things will have, so it is a service
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; rather than something an editor arranges for itself.
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;
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; run says it was given nothing
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; run whatever else says "whatever else"
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;
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; The whole rest of the line arrives, spaces and all, rather than a list of words. What
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; counts as an argument is the program's business; the system's business is handing over
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; what was typed.
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#Include services.asm
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#Program
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#Base 0x5000
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start:
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SETD.0 Given
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INIB 0d64
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SWI osArgument
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SETD.0 Given
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LDA.0
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BRA sayNothing
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SETD.0 SaidText
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SWI osPrintString
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SETD.0 Given
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SWI osPrintString
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BRI sayEnd
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sayNothing:
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SETD.0 NothingText
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SWI osPrintString
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sayEnd:
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SETD.0 NewLine
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SWI osPrintString
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RSTA
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SWI osExit
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#Data
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#Base 0x3000
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SaidText:
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"it says: "
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NothingText:
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"nothing was said"
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NewLine:
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0x0A 0x00
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Given:
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#Reserve 0d64
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