1.3 KiB
Gidubba
Gidubba (Sumerian for 'stylus') is a simple line editor for the Thingamajig computer architecture. Its git repository can be found at https://ahti.space/git/crazyettin/Gidubba and that of Thingamajig at https://ahti.space/git/crazyettin/Thingamajig.
System requirements
Gidubba requires a terminal with local echo at address FFFF and optionally a line printer at address FFFE. The emulator implementation included in the Thingamajig repository is suitable. If your setup differs from this you may have to modify the code yourself.
Usage
The commands are individual letters that depending on the command can be followed by an argument. The argument can be either a hexadecimal line number between 0 and FFFF or a hash (#), a shortcut for line FFFF. An argument to a non-existent line will be interpreted as referring to the line number after the last line.
Commands with an argument:
- I: Insert a line or lines
- D: Delete a line
- L: List a line
Commands with no argument:
- P: Print (requires a printer)
- H: Halt
Both commands and arguments are case-insensitive. In both the command prompt as well as when inserting lines sending an escape (^[) will allow retyping the line in question. To finish inserting lines send a substitute (^Z): the line on which this is done is not saved.