Wow 7 secondes.... Some of wav used took 15 mins for me at 300 bauds...Looks great! You've prompted me to share something I prototyped about 2 years ago, but I've not done much with since. I always liked the RomPac form factor and the concept of re-purposing the cartridges. But I mainly wanted a speedier way to load Sorcerer software, but without any H/W mods. So I prototyped something I dubbed "WizPac", which is basically an Arduino, display and SD card in an 8-track cartridge. That way, you don't need any additional hardware and it keeps the side slot free. It plugs into the parallel port and loads binary files at a speed of approx 38kbaud. So 7 seconds for a 32kb image. Longer term I'm hoping to code it for R/W.
Nice. Similar to what I did using the UART:It plugs into the parallel port and loads binary files at a speed of approx 38kbaud.