Dear Alex,
I think that you missed the Specification of APMSX.
This is the specification of APMSX>
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Specifications
Name of the card; APMSX V1.23a
MSX1 compatible;
What is MSX? please refer here
https://en.wikipedia.org/wiki/MSX
Games for fun;
https://www.youtube.com/results?search_query=MSX1+games
VDP; TMS9918 (NTSC)
PSG; AY3-8910
RAM; 512KB SRAM
Z80 Clock speed; 3.58Mhz, 7.16Mhz, 4Mhz, 8Mhz, 16Mhz(Overclocked)
RAM Mapper support; 256KB MAX
Mega ROM mapper support; 256KB MAX, Konami, ASCII 8K, ASCII 16K
Keyboard; 1 PS2 Keyboard port
Joystick; 1 MSX DB9 standard port
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APMSX is not only the purpose to play old games
Because there are many ways to play old machine games by software emulators
But, It is a real MSX computer and fusion into the APPLE II system hence can share each other system resources.
It was a complicated project but, it would be a good way to invite another old school system.
You would be happy if I could make a such as the Comodore.
If I could keep motivation, I could try to put another system into the APPLE II.
Thanks;
Ian Kim