Post by Retro Virtual Machine in Tiny Dungeons (ZX Spectrum) comments

Viewing post in Tiny Dungeons (ZX Spectrum) comments

I love this game, I have paid for it. I have found a problem, it does not load well in the +2A (In my emulator Retro Virtual Machine, and neither in fuse) but nevertheless it does work well in the +3 ¿¿??

This as an emulator author is very funny, as both machines are supposed to be almost the same except for the disk interface. It would be nice if someone could test it on a real machine to see if we discover something new and the fault is ours.

Then if I have some time I will investigate what is happening and what is causing it to hang at the end of loading.

Anyway in the rest of the machines it goes perfect and the game is great fun as always.

Congratulations!!!

The Retro Gaming Club2 years ago (1 edit)

Weirdly it works in +2 mode, just not +2A which is a bit of an odd one to say the least. Love your emulator by the way, looking forward to the next release :D

RetroHitch2 years ago

Can confirm this does not work on a real hardware +2A or Spectaculator

sergiothepope2 years ago(+2)

The problem comes with some $e5 at $c002 in page 1. In +3 the page 1 is initialized with zeroes, from $c000 and so on. But in +2a mode, the page 1 is full of $e5. There is routine in $c0b1 in page 1 that initializes some adress in some call opcodes, but if byte at $c002 is not 0 then doesn't set this adresses, because uses this byte as a "already init" mark.

It is not an emulation issue, because this bytes are zeroed in the init of the computer (rom 0), and later it is inited with $e5 from rom 2 (+3dos ), by a ldir at $1a87.

itch.io

Viewing post in Tiny Dungeons (ZX Spectrum) comments