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/*
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!/*.asm
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!/.gitignore
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!/license.md
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!/readme.md
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MIT License
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===========
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Copyright (c) 2022
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Gidubba
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========
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Gidubba (Sumerian for 'stylus') is a simple line editor for the
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Thingamajig computer architecture. Its git repository can be found at
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https://ahti.space/git/crazyettin/Gidubba and that of Thingamajig at
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https://ahti.space/git/crazyettin/Thingamajig.
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System requirements
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-------------------
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Gidubba requires a terminal with local echo at address FFFF and
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optionally a line printer at address FFFE. The emulator implementation
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included in the Thingamajig repository is suitable. If your setup
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differs from this you may have to modify the code yourself.
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Usage
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-----
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The commands are individual letters that depending on the command can be
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followed by an argument. The argument can be either a hexadecimal line
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number between 0 and FFFF or a hash (#), a shortcut for line FFFF. An
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argument to a non-existent line will be interpreted as referring to the
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line number after the last line.
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Commands with an argument:
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* I: Insert a line or lines
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* D: Delete a line
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* L: List a line
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Commands with no argument:
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* P: Print (requires a printer)
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* H: Halt
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Both commands and arguments are case-insensitive. In both the command
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prompt as well as when inserting lines sending an escape (^[) will allow
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retyping the line in question. To finish inserting lines send a
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substitute (^Z): the line on which this is done is not saved.
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