From http://www.maushammer.com/vmu.html

The last two undocumented opcodes are $50 and $51, and I'm going to
tentatively name them LDF and STF (email me if you have a better name, these
aren't supported in the assembler). The $50 instruction reads the flash
memory and works like an LDC except that it doesn't add ACC to the address.
The 17th address bit is taken from SFR $154. Opcode $51 writes the flash,
but it has a safeguard which makes it a bit more difficult to use.


----- Original Message -----
From: "Michel Gerritse" <michel_gerritse@...>
To: <vmu-dev@yahoogroups.com>
Sent: Tuesday, October 01, 2002 1:02 AM
Subject: [vmu] Potato missing opcodes


> - Does anyone has information of opcodes 0x50 and 0x51 ?? The Sega VMU
> Hardware manual doesn't have a description of them (probably because they
> are only used by the bios).
>
> - Are the indirect (@Rj) byte opcodes always related to RamBank0 ?? No
> matter what the value of the RAMBK0 flag is ??
>
> - Also, does someone has Sega binaries, so I can test my POTATO core even
> more ??
>
> Thanks in advance,
>
> Gerrie
>
>
>
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>
>

- Does anyone has information of opcodes 0x50 and 0x51 ?? The Sega VMU
Hardware manual doesn't have a description of them (probably because they
are only used by the bios).

- Are the indirect (@Rj) byte opcodes always related to RamBank0 ?? No
matter what the value of the RAMBK0 flag is ??

- Also, does someone has Sega binaries, so I can test my POTATO core even
more ??

Thanks in advance,

Gerrie



_________________________________________________________________
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I have recently compiled the sources for the assembler,emulator,disassembler,and
VMI file creator,on linux for the dreamcast.I was curious if anyone has tried to
do this.I've had trouble compiling the disassembler(errors with the command line
options-strnicmp stricmp-)but most compiled fine.I am using only the
distribution version of linuxdc(diskjuggler image)and a serial cable connection
to transfer the files.


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>Last I heard, the BIOS has not been dumped. You may wish to contact
>Marcus Comsted to verify this, seeing as he wrote SoftVMS and the VMU
>assembler. If anyone does know of a way to dump it thru a Double Power,
>I'd be glad to dump mine for you.

I have a copy of Japanese BIOS.

It should be faisable to rewrite a small program to read one from a VMU,
if I recall properly.

Last I heard, the BIOS has not been dumped. You may wish to contact
Marcus Comsted to verify this, seeing as he wrote SoftVMS and the VMU
assembler. If anyone does know of a way to dump it thru a Double Power,
I'd be glad to dump mine for you.

xega_emu wrote:
> Hi, I'm new to this group, so let me first introduce myself. I'm
> Michel Gerritse (aka Gerrie) and I'm the author of a Sega
> Genesis/SegaCD/32X emulator called Xega (xega.emucamp.com)
>
> Anyway, I recently got very interested in the Dreamcast VMU, and I
> decided to write an emulator for it. So I have a question for you
> people. Is the VMU bios already dumped ?? If not, way ?? If so, can
> somebody give me an URL where to find it (or send it to me using
> email).
>
> I know this is a stupid ROM request, but it certainly will help me
> with the development of DreamVMU (my emulator).
>
> Thanks in advance,
>
> Gerrie
>
>

Hi, I'm new to this group, so let me first introduce myself. I'm
Michel Gerritse (aka Gerrie) and I'm the author of a Sega
Genesis/SegaCD/32X emulator called Xega (xega.emucamp.com)

Anyway, I recently got very interested in the Dreamcast VMU, and I
decided to write an emulator for it. So I have a question for you
people. Is the VMU bios already dumped ?? If not, way ?? If so, can
somebody give me an URL where to find it (or send it to me using
email).

I know this is a stupid ROM request, but it certainly will help me
with the development of DreamVMU (my emulator).

Thanks in advance,

Gerrie

As commented in my http://www.jumpstation.co.uk/si/si.html space
invaders source I worked from the great Alessandro Sanasi
http://www.franken.de/users/deco/myfiles/myfiles.html#sample
I hope that is what you are looking for

  --- sulakd@... wrote: > I'm not getting anywhere in my vmu
assembly attempts.  There is a
> common
> section of code in all the programs I've looked at(reset and interupt
> vector
> initializations??).  There is always some undocumented code right
> after that
> section that varies a little from program to program that I cant make
> sense
> of.  Anyway, to my question...Is there a hello world example anywhere
> out
> there?  I'd like to look at something that simple with no icons etc
> so i
> could see the basic initializations and where the actual game code
> goes.
> Thanks,
> sulakd@...
>
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>

=====
Later ...

rednuht@...
-+-..=|<[{(_"!"_)}]>|=..-+-


__________________________________________________
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I'm not getting anywhere in my vmu assembly attempts.  There is a common
section of code in all the programs I've looked at(reset and interupt vector
initializations??).  There is always some undocumented code right after that
section that varies a little from program to program that I cant make sense
of.  Anyway, to my question...Is there a hello world example anywhere out
there?  I'd like to look at something that simple with no icons etc so i
could see the basic initializations and where the actual game code goes.
Thanks,
sulakd@...

I personaly use the nexus 16mb vmu with pc link cable and then copy
from there to my real VMU via the dreamcast.
The offical dev kit is not geared in any shape or form to be 'picked
up' and used.
Marcus docs are much more complete and acurate and so is his assembler,

http://mc.pp.se/dc/
Use the many fully documented ASM VMU projects such as the (plug plug)
space invaders VMU style (>90% of lines commented)
http://www.jumpstation.co.uk/si/si.html

--- newstarsabove <newstarsabove@...> wrote: > I need a more
direct answer on where to get a cable to connect my VMU
>
> to my PC. Even better would be well documented instructions for
> building one.
>
> Also, can the (offical) VMU DevKit *realy* be found anywhere (this
> group other some place else)? I looked in the files section and it
> appears to not be present. If it is not available, is there a good
> third party kit available?
>
> Thanks.
>  - Nstars
>
>
> ------------------------ Yahoo! Groups Sponsor
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>
> Your use of Yahoo! Groups is subject to
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>
>

=====
Later ...

rednuht@...
-+-..=|<[{(_"!"_)}]>|=..-+-


__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
http://uk.my.yahoo.com

I need a more direct answer on where to get a cable to connect my VMU
to my PC. Even better would be well documented instructions for
building one.

Also, can the (offical) VMU DevKit *realy* be found anywhere (this
group other some place else)? I looked in the files section and it
appears to not be present. If it is not available, is there a good
third party kit available?

Thanks.
  - Nstars

I have written a program for the vmu that will let you select files to use from
a menu,and display text files called VMos.The web page address
is-http://www.angelfire.com/sc3/vmosco-,it's also in the bookmarks section.If
you want to use your file(game/program) with VMos,send an email to
seanvmu@... ,I can explain how to make any changes or you can send
the file to me to change.

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the vmu-dev
group.

   File        : /VMU games & emu.zip
   Uploaded by : jovemor17 <jovemor17@...>
   Description : Around 40 games for VMU

You can access this file at the URL

http://groups.yahoo.com/group/vmu-dev/files/VMU%20games%20%26%20emu.zip

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

jovemor17 <jovemor17@...>

I know I've seen it b4 but i can't find it. Can sum one help me out?

It still exists.

the URL is http://www.vmuscript.8m.com/


--- Paul Kratt <sblur@...> wrote:
> Have you tried VMUscript? I'm not sure of the URL,
> but you should find
> it if you search around, if it still exists. It's a
> lower level lang
> than ASM with many examples and aparently works
> good. I've not looked at
> it much though, but it's probably much easier to
> use.
>
>
> sulakd@... wrote:
> > I have a vmu assembler and compiler, but i'm
> having trouble getting started
> > with coding.  I don't have much experience writing
> in assembly (just one
> > class).  If anyone has a small piece of sample
> code or knows of a site i
> > could look at, it would be helpful.
> > Thanks,
> > sulakd@...
> >
> > p.s. I did get a chance to look over some of the
> source code for minesweeper
> > by soren gust, but it was a HUGE document and i
> just got more confused.
> >
> >
> >        post:  vmu-dev@eGroups.com
> > unsubscribe:  vmu-dev-unsubscribe@eGroups.com
> >     archive:
> http://www.egroups.com/group/vmu-dev/
> >         faq:
> http://vmudev.dcemulation.com/faq.html
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
> >
>
>
>
>
>


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Try my space invaders source code, it has comments on almost all lines.
and i am happy to answer any questions

http://www.jumpstation.co.uk/ - my home pages
http://www.jumpstation.co.uk/si/si.html - details on space indavers VMU
http://www.jumpstation.co.uk/si/si.zip - direct link to all the files

  --- sulakd@... wrote: > I have a vmu assembler and compiler, but
i'm having trouble getting
> started
> with coding.  I don't have much experience writing in assembly (just
> one
> class).  If anyone has a small piece of sample code or knows of a
> site i
> could look at, it would be helpful.
> Thanks,
> sulakd@...
>
> p.s. I did get a chance to look over some of the source code for
> minesweeper
> by soren gust, but it was a HUGE document and i just got more
> confused.
>
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>
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>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>

=====
Later ...

rednuht@...
-+-..=|<[{(_"!"_)}]>|=..-+-


__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
http://uk.my.yahoo.com

Have you tried VMUscript? I'm not sure of the URL, but you should find
it if you search around, if it still exists. It's a lower level lang
than ASM with many examples and aparently works good. I've not looked at
it much though, but it's probably much easier to use.


sulakd@... wrote:
> I have a vmu assembler and compiler, but i'm having trouble getting started
> with coding.  I don't have much experience writing in assembly (just one
> class).  If anyone has a small piece of sample code or knows of a site i
> could look at, it would be helpful.
> Thanks,
> sulakd@...
>
> p.s. I did get a chance to look over some of the source code for minesweeper
> by soren gust, but it was a HUGE document and i just got more confused.
>
>
>        post:  vmu-dev@eGroups.com
> unsubscribe:  vmu-dev-unsubscribe@eGroups.com
>     archive:  http://www.egroups.com/group/vmu-dev/
>         faq:  http://vmudev.dcemulation.com/faq.html
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

I have a vmu assembler and compiler, but i'm having trouble getting started
with coding.  I don't have much experience writing in assembly (just one
class).  If anyone has a small piece of sample code or knows of a site i
could look at, it would be helpful.
Thanks,
sulakd@...

p.s. I did get a chance to look over some of the source code for minesweeper
by soren gust, but it was a HUGE document and i just got more confused.

thanks, but who are you  dev? what is your name? how old are you? where are
you from?

--- In vmu-dev@y..., "bluestone174" <icebreaker147@a...> wrote:
> Hello, i just downloded a vmi file and i want to kknow how in the
> world i would get that file on my VMU????????

you need the .vms not the .vmi
to do this:
-go over the link and choose COPY
-on the URL bar choose PASTE
-change the extension to .vms
-download

this works on most VMU files on the net.

to transfer to the VMU you need a NEXUS CARD or any VMU with a PC link cable.

Hello, i just downloded a vmi file and i want to kknow how in the
world i would get that file on my VMU????????

That'd be great - preferably vmu-script!

since i wrote the compiler, i like to see how people
use the language :-)

--- sean m budd <seanvmu@...> wrote:
> If you would like the source code,I can attach it to
> an email.(vmuscript or asm)
>
>
>
> Join 18 million Eudora users by signing up for a
> free Eudora Web-Mail account at
> http://www.eudoramail.com
>


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If you would like the source code,I can attach it to an email.(vmuscript or asm)



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If you would like the source code,I can attach it to an email.(vmuscript or asm)



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what about the source code?

--- sean m budd <seanvmu@...> wrote:
> You can find it on virtuamunstaz -also a text
> browser(reads flash rom as ascii text).
>
>
>
> Join 18 million Eudora users by signing up for a
> free Eudora Web-Mail account at
> http://www.eudoramail.com
>


__________________________________________________
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Yahoo! - Official partner of 2002 FIFA World Cup
http://fifaworldcup.yahoo.com

You can find it on virtuamunstaz -also a text browser(reads flash rom as ascii
text).



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when I went to the link, ANGELFIRE just said that the URL was wrong.

--- In vmu-dev@y..., "sean m budd" <seanvmu@e...> wrote:
> If anyone can use this,i wrote a monitor program for the vmu.You
can view the files rom and read/write to the user ram,as well as
write ram to the flash rom.You can find it <a
href="http://www.angelfire.com/games4/vmos/vmos.html">here</a>.It was
written in vmuscript.
>
>
> Join 18 million Eudora users by signing up for a free Eudora Web-
Mail account at http://www.eudoramail.com

We would like to remind you of this upcoming event.

Richard's birthday ;-)

Date: Wednesday, May 15, 2002
Time: All Day

well, I was stuck for stuff to add to the calendar, okay ;-)

If anyone can use this,i wrote a monitor program for the vmu.You can view the
files rom and read/write to the user ram,as well as write ram to the flash
rom.You can find it <a
href="http://www.angelfire.com/games4/vmos/vmos.html">here</a>.It was written in
vmuscript.


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> ANYWAY - you can download the game itself from your dreamcast or pc
> at http://www.virtuamunstaz.de/vmi.jsp
> just click on the classic tetris icon titled eliza.

If you mail to me regarding such uploads I can make the files
explicitely available on their own page.

Leo.

On 10 Mar 02, vmufan@... (vmufan) wrote:

> There is another space invaders type game on virtuamunstaz.de made
> by M.Jumper with his script.

I too have started to make a 'Space Invaders' type game quite a while
back... actually it's a mix between 'Wavy Navy' (where your ship moves on
waves) and 'Galaxians' (where the enemies also fly occasional attacks).
But I stopped halfway through because everyone seemed to have turned away
from the VMU and instead started programming on the Dreamcast, so all I
have is a very very early beta (playable, but only one 'demo' level to
test if all movement etc. works properly).

However, if anyone wants to have a look, you can download it here:

       http://www.franken.de/users/deco/WAVEDEMO.VMI

Bye


Alessandro
---
You get what anyone gets. You get a lifetime.