5 Dec
2002
5 Dec
'02
7:26 p.m.
I've threatened to do it and so I did. This is The Incredible KIMplement, a
partial emulation of the KIM-1, entirely in software, for the stock Commodore
64.
http://www.floodgap.com/retrobits/kim-1/
This isn't a joke.
It has a full software 6502 core, which works by distilling opcodes down
into "safe" equivalents and running those natively to reduce the work it
has to do. All memory access is trapped and abstracted. The 6502-on-6502 core
is machine-independent and hopefully I can use it to do tricks like
virtual memory, protected memory and interruptable/restartable instructions.
The emulator includes LED emulation, 6502 emulation (NMOS documented
instructions only), SST emulation, keypad emulation, and even supports an
emulated TTY. No interval timers yet, but I'm working on it (the ROMs have
been trapped so they don't need them).
Revision E ROMs are built-in. Hope no one still asserts the rights ...
Thanks to Jim Butterfield and Peter Jennings, I've also included Lunar
Lander, Addition, Key Train, Sort (all from First Book of KIM) and the
original Microchess as a separate download. Beware of Microchess; on the
emulator running on a stock C64 in Normal mode, it will take about 30
minutes to compute a move! :-)
In the future, I want to use that software core to make a proper OS for the
C64 (or Commodore One). The 6502 has gone too long without a proper MMU.
Let me know what you guys think,
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Remember, kids: for great justice take off every zig! ----------------------
6 Dec
6 Dec
12:49 a.m.
This isn't a joke.
It has a full software 6502 core, which works by
distilling opcodes down
into "safe" equivalents and running those natively to reduce the work it
has to do. All memory access is trapped and abstracted. The 6502-on-6502 core
is machine-independent and hopefully I can use it to do tricks like
virtual memory, protected memory and interruptable/restartable instructions.
You are realy pushing hard for the 'All Time Weiredness Award'.
It is a bit to late for April 1st, so, Cameron you're a genius ...
any chance you're publishing the source code at one time? I'd
love to see this on a real computer :)
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
4:20 a.m.
You are realy pushing hard for the 'All Time
Weiredness Award'.
I'm sure I passed go years ago ;-)
It is a bit to late for April 1st, so, Cameron
you're a genius ...
any chance you're publishing the source code at one time? I'd
love to see this on a real computer :)
What? the C64 isn't a *real* computer? ;-)
Seriously, though, the emulator core is system-independent but it needs a
6502 to run on (or an '816, I guess). To get all of the proper processor
flags set quickly, it actually does run selected parts of the code natively.
For example, an LDA-absolute is turned into two steps; first is the fetch
from emulated memory, and then that result is turned
into a native
LDA-immediate and executed so I get my N and V flags set for free.
I'd have
to do a lot more work on another architecture.
The Commodore One should kick butt with this, though.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- The new Tourette Syndrome movie: Twitch and Shout! -- John Waters ----------
4:40 a.m.
> It is a bit to late for April 1st, so, Cameron
you're a genius ...
> any chance you're publishing the source code at one time? I'd
> love to see this on a real computer :)
What? the C64 isn't a *real* computer? ;-)
Well, let's skip this ... :)
Seriously, though, the emulator core is
system-independent but it needs a
6502 to run on (or an '816, I guess). To get all of the proper processor
flags set quickly, it actually does run selected parts of the code natively.
For example, an LDA-absolute is turned into two steps; first is the fetch
from emulated memory, and then that result is turned into a native
LDA-immediate and executed so I get my N and V flags set for free. I'd have
to do a lot more work on another architecture.
Now, I'd love to see the source code.
The Commodore One should kick butt with this, though.
Already a IIgs would add some speed...
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
8:55 a.m.
On Fri, 6 Dec 2002, Cameron Kaiser wrote:
Seriously, though, the emulator core is
system-independent but it needs
a 6502 to run on (or an '816, I guess). To get all of the proper
processor flags set quickly, it actually does run selected parts of the
code natively. For example, an LDA-absolute is turned into two steps;
first is the fetch from emulated memory, and then that result is turned
into a native LDA-immediate and executed so I get my N and V flags set
for free. I'd have to do a lot more work on another architecture.
Cameron, yopu are simply AWESOME!
I want to play with this on my Apple ][.
I seem to remember a program I had for the Apple ][ that emulates the 6502
also. In fact, I have it here in my office. I think I'll dig it out and
try to figure out how it worked (since I never really played with it back
then).
But still, Cameron, you are AWESOME!
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
2:45 p.m.
I want to play with this on my Apple ][.
The core is portable, anyway. The remaining hardware emulation uses sprites
and a few other tricks which might be a bit harder but still doable.
I seem to remember a program I had for the Apple ][
that emulates the 6502
also. In fact, I have it here in my office. I think I'll dig it out and
try to figure out how it worked (since I never really played with it back
then).
I remember this too. Wasn't it called something like The Visual Computer, or
some such?
One of my 6502 programming books stepped you through creating a simulation
of the 6502 in software, but it was in BASIC, and it didn't cover all the
opcodes (bummer). Otherwise it was exceptionally educational.
But still, Cameron, you are AWESOME!
*blush*
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- I've been in the van fifteen years, Harry! -- "True Lies"
------------------
3:46 p.m.
On Fri, 6 Dec 2002, Cameron Kaiser wrote:
Sprites? What for?
Yes, that's it!
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
I want to play
with this on my Apple ][.
The core is portable, anyway. The remaining hardware emulation uses sprites
and a few other tricks which might be a bit harder but still doable. I seem to
remember a program I had for the Apple ][ that emulates the 6502
also. In fact, I have it here in my office. I think I'll dig it out and
try to figure out how it worked (since I never really played with it back
then).
I remember this too. Wasn't it called something like The Visual Computer, or
some such?
4:42 p.m.
The core is
portable, anyway. The remaining hardware emulation uses sprites
and a few other tricks which might be a bit harder but still doable.
Sprites? What for?
9 Dec
9 Dec
12:23 a.m.
> > I seem to remember a program I had for the
Apple ][ that emulates the 6502
> > also. In fact, I have it here in my office. I think I'll dig it out and
> > try to figure out how it worked (since I never really played with it back
> > then).
> I remember this too. Wasn't it called
something like The Visual Computer, or
> some such?
Yes, that's it!
You're not talkng about the 'Visual 6502' ?
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
7:34 a.m.
On Mon, 9 Dec 2002, Hans Franke wrote:
Ok, the actual title is "The Visible Computer: 6502".
I'll play with it later on (if I have time).
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
> > I
seem to remember a program I had for the Apple ][ that emulates the 6502
> > also. In fact, I have it here in my office. I think I'll dig it out and
> > try to figure out how it worked (since I never really played with it back
> > then).
> I remember this too. Wasn't it called
something like The Visual Computer, or
> some such?
Yes, that's it!
You're not talkng about the 'Visual 6502' ? 
9 Dec
9 Dec
12:35 a.m.
> I want to play with this on my Apple ][.
The core is portable, anyway. The remaining hardware
emulation uses sprites
and a few other tricks which might be a bit harder but still doable.
Well, again, porting it to an Apple II type machine is the way to
go. Every out of the Box IIgs is a 2.8 MHz 65816 and a plain IIc+
is a 4 MHz 65C02 and therefore more suitable - geting the emulated
Microcess down to 7 minutes per turn will be a quite nice thing...
And then there are the 4 and 8 MHz Zip Chips and the 5 and 10 MHz
Rocket Chips for plain Apples. Not to speak of the TransWarp CPUs
for the GS.
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
6 Dec
6 Dec
2:28 a.m.
I presume this would run under an emulated C64 under Windows or Linux?
--John
-----Original Message-----
From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]On
Behalf Of Cameron Kaiser
Sent: Friday, December 06, 2002 01:38
To: cctalk(a)classiccmp.org
Subject: KIMplement for the C64
I've threatened to do it and so I did. This is The Incredible KIMplement, a
partial emulation of the KIM-1, entirely in software, for the stock
Commodore
64.
http://www.floodgap.com/retrobits/kim-1/
This isn't a joke.
It has a full software 6502 core, which works by distilling opcodes down
into "safe" equivalents and running those natively to reduce the work it
has to do. All memory access is trapped and abstracted. The 6502-on-6502
core
is machine-independent and hopefully I can use it to do tricks like
virtual memory, protected memory and interruptable/restartable instructions.
The emulator includes LED emulation, 6502 emulation (NMOS documented
instructions only), SST emulation, keypad emulation, and even supports an
emulated TTY. No interval timers yet, but I'm working on it (the ROMs have
been trapped so they don't need them).
Revision E ROMs are built-in. Hope no one still asserts the rights ...
Thanks to Jim Butterfield and Peter Jennings, I've also included Lunar
Lander, Addition, Key Train, Sort (all from First Book of KIM) and the
original Microchess as a separate download. Beware of Microchess; on the
emulator running on a stock C64 in Normal mode, it will take about 30
minutes to compute a move! :-)
In the future, I want to use that software core to make a proper OS for the
C64 (or Commodore One). The 6502 has gone too long without a proper MMU.
Let me know what you guys think,
--
----------------------------- personal page:
http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University *
ckaiser(a)stockholm.ptloma.edu
-- Remember, kids: for great justice take off every
zig! ----------------------
4:15 a.m.
I presume this would run under an emulated C64 under
Windows or Linux?
Yes, it will. I developed it on an emulator on my Power Mac using a
cross-assembler, and then moved it to the real 64 for testing/tweaking.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Conscience makes egotists of us all. -- Oscar Wilde ------------------------
7895
days inactive
7900
days old
14 comments
6 participants
participants (6)
-
eric＠brouhaha.com -
foo＠siconic.com -
Hans.Franke＠mch20.sbs.de -
jcwren＠jcwren.com -
kevenm＠reeltapetransfer.com -
spectre＠stockholm.ptloma.edu