== System Cartridge (BIOS of CPC+) and Game Cartridges ==
* '''Size: 51x60 52x60 mm''' [[GX4000 cartridge|(more pictures)]]
[[File:Inside GX4000 cart 1 unrotated.jpg|25px26px|left]]
* '''Board: PT-NO-Z90903-MC0121A'''
* With custom LKs, and double-sided soldering points.
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[[File:Cartridge-PT-NO-Z90903-MS0201A-Installed.jpg|25px26px|left]]
* '''Board: PT-NO-Z90903-MS0201A'''
* With custom LKs, and single-sided soldering points.
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[[File:Cartridge-2700-023P-1-Installed.jpg|25px26px|left]]
* '''Board: 2700-023P-1'''
* With hardwired LK1 and LK6, and single-sided soldering points.
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[[File:Dragon CPC Plus System Cartridge PC Spanish.jpg|25px26px|left]]
* '''Board: Nonamed'''
* Spanish cartridge without text-layer on PCB (otherwise same as 2700-023P-1).
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[[File:Cart_PCB_AMSTRO1_top.jpg|25px26px|left]]
* '''Board: AMSTRO1''' (LK1-LK6 are called L1-L6 here)
* With hardwired LK1 and LK6, and double-sided soldering points.