The N8 is an "all in one" design with
Z8S180, 1 MB SRAM, 1 MB EPROM or
512KB
Flash, dual serial ports, parallel printer port, PS/2 keyboard and mouse
ports, RTC and NVSRAM (DS1302), composite NTSC video (TMS9918A), audio
(AY-3-8910), dual joystick ports, IDE port, FDC port, SD socket, optional
CSIO port, optional RS-485 networking port, and ECB bus expansion. It can
be powered from a 9VDC wall supply or from a scrap PC power supply and
fits
on a 10"x6" PCB.
Are you building a "MSX on a card" ? :oD