Hi Andy,
Thanks for the feedback! Good to hear it basically worked, mostly![:lol:]( "Laughing")
Regarding the IFEL EROM - I'm not familiar with this device (do you have any links or documentation?) but if it shows up as two ordinary sideways ROMs in banks 6 and 7, then this is definitely supposed to work, and I've tested this case under emulation. I don't have any immediate suggestions, but - does it work with unmodified MOS 3.50 as well?
Regarding the relocation table: there's two parts to it, the table itself (which needs to go in another ROM), and then a little info block in the relocated ROM itself that tells the relocator where to find the table. The only documentation I'm aware of is the Acorn MOS 3.50 manual, such as it is (a handful of pages), which has a section about the relocator at the end, including a BBC BASIC program for generating the relocation data. I've not tried the program but I found the explanation clear enough.
You can find a PDF copy here: https://github.com/bitshifters/bbc-docu ... 203.50.pdf (the GitHub PDF viewer isn't great, but there's a download link)
Or a text copy here: https://github.com/bitshifters/bbc-docu ... MOS350.txt
(The info would also let you manually sort out a relocatable version of The BASIC Editor. It's already got the relocation info block set up, and it just needs to be pointed at the right address and ROM where you've inserted the relocation data - probably the DFS ROM, as there's spare space. There'd be some self-assembly required here though! I haven't been through this process by hand myself.)
--Tom
P.S. for formatting your post, if you want a monospaced block you can use the </> button
Thanks for the feedback! Good to hear it basically worked, mostly
Regarding the IFEL EROM - I'm not familiar with this device (do you have any links or documentation?) but if it shows up as two ordinary sideways ROMs in banks 6 and 7, then this is definitely supposed to work, and I've tested this case under emulation. I don't have any immediate suggestions, but - does it work with unmodified MOS 3.50 as well?
Regarding the relocation table: there's two parts to it, the table itself (which needs to go in another ROM), and then a little info block in the relocated ROM itself that tells the relocator where to find the table. The only documentation I'm aware of is the Acorn MOS 3.50 manual, such as it is (a handful of pages), which has a section about the relocator at the end, including a BBC BASIC program for generating the relocation data. I've not tried the program but I found the explanation clear enough.
You can find a PDF copy here: https://github.com/bitshifters/bbc-docu ... 203.50.pdf (the GitHub PDF viewer isn't great, but there's a download link)
Or a text copy here: https://github.com/bitshifters/bbc-docu ... MOS350.txt
(The info would also let you manually sort out a relocatable version of The BASIC Editor. It's already got the relocation info block set up, and it just needs to be pointed at the right address and ROM where you've inserted the relocation data - probably the DFS ROM, as there's spare space. There'd be some self-assembly required here though! I haven't been through this process by hand myself.)
--Tom
P.S. for formatting your post, if you want a monospaced block you can use the </> button
Statistics: Posted by tom_seddon — Wed Jan 15, 2025 9:26 pm