For details about the Plus/GX4000 hardware features, see [[Arnold V Specs Revised]].
== Booting from cartridge ==
By default, the Z80 is in Interrupt Mode 0. Also, the FDC is in DMA mode by default.
Anyway, you have to initialize all internal components (Z80, PPI, CRTC, AY, etc) when you are booting from cartridge.
== Software ==