NSDOS Leaf EDitor

An ED (GNU + CP/M) inspired editor for the NorthStar Graphics Disk Operating System version 1.0.0AQ

I'd recomend having syntax highlighting for the intel 8080's pnemonics, and tabsize of 8. Though it's perfectly acceptable to view it with no highlighting. wrote a simple vim syntax file for it, here, but for other edittors you're on your own

Assembling Information

The assembly uses intel 8080 pnemonics and is designed to assemble using CP/M's ASM.COM and LOAD.COM. All other methods of assembly are untested, and as such, may require modifications to directive or comments declarations.

note: getting the assembled binary off of CP/M and onto NSDOS can be difficult. One, non-ideal, method is to write the file as hex, using MC000 (nsdos monitor program) and then save that chunk of memory into the required file.

supplied are a short description of directives used

Directive	Description
ORG	set program origin point
END	end of source code
EQU	pre-processor constant
DB	define Byte(s)
DW	define Word(s)
DS	declare n Bytes of data
;	comment specifer
:	define a label
$ (in EQU)	current memory location
$	empty spacer, helpful in numbers and labels
!	virtual newline
+-/*	preprocessor arithmatic
''	string specifier, CANNOT be doube quotes

number definitions as used within this project

Base	Definition	Example (24 decimal)
Hex (16)	0xxH	018H
Dec (10)	xx	24
Oct (8)	0xxxxQ	030Q
Bin (2)	0xxxx$xxxxB	00001$1000B

License (Apache Versoin 2.0)

Copyright 2023 Sage I. Hendricks

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.