Hi Jonathan do you have any plans to convert any of your game making software to run on the SAM Coupe?
SAM COUPE is in ZX mode compatible with ZX Spectrum 48, only use different timing (faster CPU). AGD version for ZX Spectrum support ULA+ palette. Is very easy modify AGD also for SAM COUPE palette. Some examples of ZX games on SAM COUPE with colour palette(static 16 colours from palette 128 colours):
Also AY chip on SAM COUPE not exist. SAM use chip SAA1099 (similar as 2x AY) and speaker. Border port, keyboard port, attribute port #FF,memory layout,videoram.. all this is on SAM in ZX mode compatible with ZX Spectrum. As next features contain SAM more videorams, more graphic modes (also colour pixel mode 256x192), programmable interrupt, big ram 256/512kB, possibility set allram mode and faster CPU (in ZX mode run Z80CPU about 15-20% faster than on ZX Spectrum.