{|{{Prettytable|width: 700px; font-size: 2em;}}
|'''MODE1'''||'''MODE0'''||'''Effect''' ||'''Example/Usage'''
|-
|LOW ||LOW ||External ROM, 4K at 0000h..0FFFh ||No hardware known to use this
|-
|LOW ||HIGH ||External ROM, 16K at 0000h..3FFFh ||Schneider [[NLQ401]] Printer (uPD7811 with internal ROM disabled)|-|HIGH ||LOW ||'''Internal''' ROM, 4K at 0000h..0FFFh||Amstrad DMP2000/DMP3000 Printer (uPD7811 with internal ROM enabled)
|-
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|HIGH ||LOW ||'''Internal''' ROM, 4K at 0000h..0FFFh|-|HIGH ||HIGH ||External ROM, 64K at 0000h..FFFFh ||Roland TR-909 Drumcomputer (uPD7811 with internal ROM disabled)
|-
|}