Posted By
jet_morgan
on 2003-08-23
|  Plus4 memory map
I am trying to convert some Vic20 and C64 software to run on the Plus4. I need the equivalent memory locations for several reasons. Has anybody a memory map of the Plus4 ?
Must keep the old thing running.
I also have 3 Plus4's for spares if anybody is interested.
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Posted By
JamesC
on 2003-08-23
| Re: Plus4 memory map
www.plus4.com and click the Programming link at the bottom of the screen.....
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Posted By
Gaia
on 2003-08-23
| Re: Plus4 memory map
You may also wish to have a peek here.
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Posted By
SVS
on 2003-08-24
 | Re: Plus4 memory map
Here is my Ultimate Rom map for Plus4
Ultimate Map
Feel free to ask me for any info you need.
Bye
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Posted By
jet_morgan
on 2003-08-26
| Re: Plus4 memory map
SVS, I tried your email address but no success.
I also tried opening the XLS file for the rom map with no success either.
Can you give me the Start and finish addresses of the RAM expansion area please ?
Regards and Thanks for the replies.
J_M.
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Posted By
Gaia
on 2003-08-27
| Re: Plus4 memory map
What do you mean on RAM-expansion?
You usually bank in the RAM by writing to register $FF3F. Writing to $FF3E banks the ROMs in instead. The plus/4 has memory area that overlaps with the system ROMs between $8000-$FCFF, $FF20-$FF3D and $FF40-$FFFF.
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