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Support MACRO-11 in PDP-11 code generator and add RT-11 runtime. - #186

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Support MACRO-11 in PDP-11 code generator and add RT-11 runtime.#186
shattered wants to merge 1 commit into
davidgiven:masterfrom
shattered:_4c009ae2

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@shattered

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MACRO-11 (and macro11) do not support jump expansion, longjmp.mac is a workaround for that.
Add 'read-only' flag to fileio.

MACRO-11 (and macro11) do not support jump expansion, longjmp.mac is a
workaround for that.

Add 'read-only' flag to fileio.
Comment thread rt/fileio.coh
index: FCBIndexType;
buffer: uint8[FCB_BUFFER_SIZE];
flags: uint8;
readonly: uint8;

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Does this belong in flags? I see it's being set to FCB_FLAG_READONLY, which looks like a flags value.

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Flags are changed by read/write/flush functions, and I didn't want to change common code too much.

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ping?

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