NCR RealPOS 50 - Character Table Select (09 H, TABLE CODE); Clear Display (12 H); Luminance Control (11 H, LUMINANCE); Cursor Position (10 H, POSITION)

2x20 Customer Display Interface 9-3
Character Table Select (09h, TABLE CODE)
Thiscommandselectswhichcharactertabletodisplay.TheTABLECODEbyte
determinesthecharactersetasdefinedinthetablebelow.Ifbits0to3areallzerothen
thiscommandisignored.Whenanewcharactertableisselectedallcharactersonthe
displaywillbeupdatedto
displaythecharacterofthenewtable.Afteraresetthe
charactertableissettoTable1
Clear Display (12h)
Thiscommandsetsall40charactersto20h(space)andmovesthecursortothefirst
positionofthetopline.
Luminance Control (11h, LUMINANCE)
Thiscommandselectsthedisplayluminance.TheLUMINANCEbytesetsthedisplay
luminancelevelasdefinedinthetablebelow.Thiscommandisignoredifthe
LUMINANCEbyteis00h.
Cursor Position (10h, POSITION)
Thiscommandsetsthecursorposition.ThePOSITIONbytemovesthecursorposition
accordingtothetablebelow.Thenextcharacterbytewritestothenewpositionand
thecursorauto‐incrementstothenextposition.Thiscommandisignoredifthe
POSITIONbytevalueisgreaterthan27h.
Table Code Character Table
01h Table1
02h Table2
03h Table3
04h Table4
LUMINANCE Display Luminance
01h 25%
02h 50%
03h 75%
04h 100%
1 2 3 4 5 6 7 8 9 1011121314151617181920
1
00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h
2
14h 15h 16h 17h 18h 19h 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh 20h 21 h 22h 23h 24h 25h 26h 27h