Some progress ...

Commented disassembly 10 January 2016

Although far from complete, this static disassembly listing has some good pointers to each command function,

Initialisation The ROM is called from BIOS through an indirect jump to $18E0, which is the word located at $2FFE. Trace $18E0 - Clear memory from $4400 to $4FFF $191D - Copy 43 bytes from $25BC to $4C67 (Section 1) $1928 - Write 60 bytes of $5E to $4C8D $1932 - Copy 13 bytes from $2EB7 to $4CCD (Se...

Initial ROM Binary Having entered the screenshots three times now - I am confident that is is a good image to start from. The ROM is mapped to $1200 through $1FFF, then from $2100 through $21FF, The attached image is linear - so it includes 256 null bytes at $2000. I/O Ports appear to be mapped at ...

Initial observations ROM is mapped at $1100 - $1FFF, and from $2100-$2FFF DISK I/O appears to be through new ports beginning at $1120 The available commands, as seen in the ROM are: FORMAT, LOAD, SAVE, RUN, KFN, UNSAVE, PROTECT, UNPROTECT, CLOSE, READ, EXEC, WRITE, OPEN, RENAME, DIR, KFN1, KFN2, MSA...

OK - downloaded - will post binary when completed.

Thanks again!

OK - today no hangover! - good start :) OK, yes I would need a dump of the memory space from $1000 to $3000, using the method you used before. By screenshot time - I mean how long it takes to capture each screen full of data - so if it takes 1 minute - the entire process should take about 16-20 minu...

OK - converted these screenshots to a binary image and the attached is what we get. The ROM entry point is $18E0. It looks like it''s a fair old size - possibly 16Kbytes from $100x through to $2FFF. If you have the screenshot time - I am more than willing to punch in the data to see what we get! The...

Ok - a little bit of BASIC 10 PT=(PEEK(12287)*256)+PEEK(12286) 20 FOR I=PT TO PT+1024 30 PRINT PT;" / ";PEEK(PT) 40 NEXT I This will hopefully dump 1k from the entry vector. You may wish to adjust this if the entry vector is above a page boundary. Thanks!! NB: Please remember it's New Years Day, and...

Unfortunately, the WAV files do not seem to contain any valid data - there is complete silence where the data should be. This is not completely unexpected - as the header / tail routines are isolated, but the BSAVE function is not. From what you have here, it would suggest that all the standard tape...