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6502
assembler (6502asm
described in detail)
There
are numerous 6502 assemblers available; however having grown
up on the BBC micro and RISC OS machines, I always use the
ampersand ('&') to denote
hex numbers, and I tend to use EQU commands for inserting
bytes. None of the other assemblers can do this, and I
didn't fancy booting up my BBC micro (or an emulation) in order
to assemble code. Therefore, it made sense that I'd "roll my
own"...
The assembler is simple to use, and the internals (if
you are interested in codey things) are equally simple. Part
of the design philosophy of Amélie, remember? You can read some in-depth
information
.
Note that at this time the assembler only
supports the original NMOS instruction set. The instructions
are loaded from a table file so you can alter or alias
instructions if you prefer, for example, to use "ADD" instead
of "ADC"...
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6502asm - NOT YET AVAILABLE
This is the 6502 assembler,
and documentation.
-
6502asm - NOT YET
AVAILABLE
This is
the 6502 assembler, and
documentation.
-
6502asm source
code
- NOT YET AVAILABLE
This is the source code for
the assembler.
The project (*.prj) file is
for Borland Visual C++ v1.00; and the MakeFile (if
present) is for the Acorn/Norcroft C compiler, to be
26/32bit neutral.
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http://www.6502.org/
You'll
find lots of information on the 6502 processor, and the
65xx family, here.
AmélieEm (AmélieEm
described in detail)
AmélieEm (or AmEm under
MS-DOS) is a complete software implementation of the
Amélie system. It has been designed to allow the
firmware to be designed and tested without the need to program
a new EPROM for each little modification.
AmélieEm features a powerful
tracing mode (called "Tracey"!) which allows single-stepping,
modification of registers and/or memory, disassembly, etc
etc...
Because of the screen handling and
keyboard reading within Tracey, AmélieEm is only available for
MS-DOS at this time.
You can read some
in-depth information
.
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AmélieEm - NOT YET
AVAILABLE
This is the
emulation software, a copy of the standard EPROM image,
and documentation.
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AmélieEm
source code
- NOT YET AVAILABLE
This is the source code for
AmélieEm, it compiles under Borland TurboC++
v1.00.
To compile it under other software
(lcc or OpenWatcom for example), you
will need to find suitable DOS.H and
CONIO.H replacements, and amend the
#ifdef lines that perform these tests.
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AmélieEm assembler
speed tweaks for RISC OS - NOT YET AVAILABLE
These nuggets of ARM assembler can be
used to speed up certain aspects of AmélieEm if
compiled under RISC OS, by optimising code that is called
a lot. This code is 26/32bit neutral, and it
is expected that you will know what to do with
it...
The emulation within AmélieEm is
missing the following:
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Very very loose support for
NMIs. Amélie doesn't use them.
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No support (whatsoever) for the BCD
maths features of the 6502. This shouldn't be hard to add
though...
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No support for the advanced features of
the 6522 VIA (serial shifting, handshaking, Timer2, IRQs on
non-CA/CB interrupts).
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Other stuff (just
to cover the hiccups of my troubled mind... :-)
).
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Currently - there is no VIA or ACIA
implementation (this includes IIC interfacing).
The VIA core exists, but
it doesn't do an awful lot right
now.
AmélieEm may be fun to play with
in Tracey, but not a lot else can be seen
to happen at this
time... |
