Intel 8080/Zilog Z80 assembler.
To use this package, run the following command in your project's root directory:
Put the following dependency into your project's dependences section:
a80 is an assembler written in D for the
Intel 8080 (and, by extension, the Zilog Z80) CPU. It produces
binaries for CP/M using the standard entry point of
a80 is developed on OpenBSD but
should work on any system that D targets.
a80 is not an exact clone of any pre-existing CP/M assember, nor
does it want to be. The differences will be explained in this
a80 also is quite conscious about its design practice and
implementation. It is written to be the subject of a series of
blog posts in which we attempt
to demystify the building of programming tools, and as such very
intentionally does not use some very obvious data structures. And
it may make some seemingly peculiar design choices. My goal is to
have written a real assembler for a real CPU that you can still
purchase today (in the form of the Z80) that true beginners can
come to understand.
After the blog series, if we want to turn this into a clone of an existing CP/M assembler, I'm all for it.
Bug reports are welcome at any time.
The output will be
A line of assembly takes the following form:
[label:] [op [arg1[, arg2]]] [; comment]
An example of an assembly program can be found in
a80 only understands Intel 8080 opcodes.
EQU directive is supported but in a slightly altered
syntax. It must be in the form:
label: equ <value>
Where value must be a number. You cannot use other labels as a value nor can you use expressions.
All op and arg must be lowercase, though labels may include capital letters.
All numbers must be in hex and must end with an
h. If a hex
number begins with
a-f, it must be prefixed with
0. This is not
too dissimilar from other CP/M assemblers.
Errors immediately terminate
a80 through the use of assertions.
Most but not all errors include a diagnostic. Missing diagnostics
will be added in the future. Please file a bug report if you
ISC license. See
LICENSE for more information.
- Registered by Brian Callahan
- 1.0.0 released 8 days ago
- Copyright © 2021, Brian Callahan