|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 [[Amstrad/Schneider DMP2000Printer|DMP2000]]/[[DMP3000 Printer |DMP3000]] Printers (uPD7811 with internal ROM enabled)
|-
|HIGH ||HIGH ||External ROM, 64K at 0000h..FFFFh ||Roland TR-909 Drumcomputer (uPD7811 with internal ROM disabled)