I'd have to admit that I've never owned one (I don't think I've ever even seen one in real life) but they looked like pretty nice machines for the time. I've only ever played with one via MAME when I was exploring how to control one of the audio chips that they had - it had a fairly nice ...

Awesome - ordered!

LOL, perhaps a Z-80 based MSX clone in the works?

That's a great idea - I had thought that it would be useful to have the Jed files available (though I did have another machine that I use just for programming PLD/ROMS so I ended up installing WinCupl anyway).

Ah, so that's how they overcome the memory limitation.

Just looked up the color command - that is a bit weird but I can see why it is done that way. The colour tables are very closely mapped with the character definitions. I ran into this oddity when I was running some tests via the 6809 and wanted ...

Excellent - glad that worked. I find it is a valuable debugging tool particularly when working with numerous unknowns.

LOL, yes, I got as far as testing PRINT "HELLO" before giving up trying to workout where all the various keys got mapped to ... I admire your endurance!

Hi David,

It's great that the swap worked.

I'm curious what failed with MAME? Were you able to select the ROM to load? Are you running the crvision emulation? In case it helps you can also specify the path on the command line e.g.

./mame -window -debug -resolution 640x480 crvision -cart /full ...

I think you can put the ROMs anywhere, when you start it up you need to press Fn-delete (at least on my Mac that's the key combination to enable the menu). Then hit the "Tab" key to bring up the menu, select File manager, then Cartridge, navigate to where you placed your rom and select it. It should ...

I have no idea of the creativision details myself but the MAME implementation may give some clues. On the face of it, it does look like there is only 1 KB of memory:


map(0x0000, 0x03ff).mirror(0x0c00).ram();


And there are two banks of ROM that can be up to 8 KB each:


map(0x4000, 0x7fff ...

Great work Greg - congratulations on getting it all running. It's quite nice seeing a complete stand-alone system like that.

were sometimes occuring at the left of the screen instead of where they were supposed to be (as though the x position was lost)
Ah, that's exactly the kind of behaviour I was noticing as well i.e. not so much a corruption in what is displayed but rather more like not quite receiving the right ...