archive.worldofdragon.org

I scanned the manual and other sheets I have for this today. I'm borrowing an EPROM programmer to dump the two copies of the ROM I have - hopefully they dump the same, or have a sane diff when dissassembled and aren't corrupt after all these years.

It's interesting to see that it was intended for a variety of machines, including the UK101

Attaching the dumps of the two copies of the ROM I have.

There is a single bit difference at offset 0x0D13, 0x7D in one version and 0xFD in the other so could be a single bit error rather than a fix. I dumped the first rom, then the second, then the first again and finally the second again. The ROMs dump the same each time they are dumped.

I've not tried to disassemble yet, but hopefully they are the 6809 version. From looking in a hex editor, the only string is "Sprite Full Colour Display <C> Premier Microsystems Written by Justin Johnson 1984"

I've put the data section into a character editor spreadsheet that I'd used for the D200E charset. Am attaching a screenshot which shows the house sprite as mentioned in the manual, along with the spreadsheet itself.

The entire character set is there, along with what looks like some trekkie stuff, planes, tanks, subs, battleships etc.

dlinsley wrote: ↑Fri May 10, 2019 3:30 am Attaching the dumps of the two copies of the ROM I have.

There is a single bit difference at offset 0x0D13, 0x7D in one version and 0xFD in the other so could be a single bit error rather than a fix. I dumped the first rom, then the second, then the first again and finally the second again. The ROMs dump the same each time they are dumped.

I note that the manual says that every copy of the Sprite software is uniquely coded. Maybe that's what this different bit is?