|[[File:Inside GX4000 cart 1 unrotated.jpg|52px]] || [[File:Inside GX4000 cart 2.jpg|52px]] || '''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|52px]] || [[File:Cartridge-PT-NO-Z90903-MS0201A-Bottom.jpg|52px]] || '''Board: PT-NO-Z90903-MS0201ARevision A''' - With custom LKs, and single-sided soldering points.|-|[[File:Z90903_MS0201A_B_PCB_Top.jpg|52px]] || [[File:Z90903_MS0201A_B_PCB_Bottom.jpg|52px]] || '''Board: PT-NO-Z90903-MS0201A Revision B'''.
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|[[File:2700-023P-1_PCB_Top.jpg|52px]] || [[File:2700-023P-1_PCB_Bottom.jpg|52px]] || '''Board: 2700-023P-1''' - With hardwired LK1 and LK6, and single-sided soldering points.
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|[[File:2700-023P-1_27C512_PCB_Top.jpg|52px]] || [[File:2700-023P-1_27C512_PCB_Bottom.jpg|52px]] || '''Board: 2700-023P-1''' - Fitted with a 27C512 Eprom. Notice the LK3 setting.
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|[[File:2700-023P-1_CA1_PCB_Top.jpg|52px]] || [[File:2700-023P-1_CA1_PCB_Bottom.jpg|52px]] || '''Board: 2700-023P-1''' - Another revision of the board.
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|[[File:Dragon CPC Plus System Cartridge PC Spanish.jpg|52px]] || || '''Board: Nonamed''' - Spanish cartridge without text-layer on PCB (otherwise same as 2700-023P-1).