mk79 wrote:When I compare 1.31 and 1.40 they are completely different, almost no bytes shared

Ditto, when I check versions posted earlier in thread v1.31 and v1.40 I find only banner and printer device name differences.aalea wrote:No idea, I convert to "ascii" with hexdump and them check de diferences, and get the change in the banner at the begin of rom and the PAR/CEN change
Is there an address clash? Is Qubide positioned at $C0000 as well as QSound. I would not assume that QL bus expanders/through port have wired out SP0-SP3 appropriately.aalea wrote:Anyway, my board seem to no like by qubide interface, and in the emulator with the original rom there is no "out of range" error, so I start to think there are some problem in my design.
If 'Ding' is sounding then I think it is safe to assume that interface is working OK. The 'out of range' error from a string seems like a bug. Are you using Minerva or QDOS when error occurs. IMHO I always defer to real hardware when problems occur

I should have an interface working in a few days (OK, by end end of week

mk79 wrote: [V1.90] There's also the preliminary source if anybody wants to debug it. Oh, it doesn't include QPrint for now and it doesn't have the rest of the crap commands.
Thanks, that would be the ideal target EPROM to get working.