GU-3900B series “General Function” Software Specification
4.7.4.39
US m n
(Horizontal scroll display quality select)
Code:
1Fh 6Dh n
n:
Horizontal scroll display quality
Definable area:
00h ≤ n ≤ 01h
n = 00h: Scroll speed-priority
n = 01h: Visual quality-priority
Default:
n = 00h or Memory SW setting.
Function:
Select horizontal scroll display quality – Scroll speed-priority or Visual quality-priority.
If Scroll speed-priority is selected, scroll speed will be faster, but partial display flickering may
increase.
If Visual quality-priority is selected, partial display flickering will decrease, but scroll speed may
become slower.
Applicable for Character display and Horizontal Tab command in Horizontal scroll mode, and
Downloaded bit image scroll display.
4.7.4.40
US r n(Reverse display)
Code:
1Fh 72h n
n:
Reverse display ON/OFF
Definable area:
00h ≤ n ≤ 01h
n = 00h: Reverse OFF
n = 01h: Reverse ON
Default:
n = 00h or Memory SW setting.
Function:
Reverse display ON/OFF for character and image display.
Changing this setting only affects subsequent data. Content already displayed is not affected.
4.7.4.41
US w n
(Write mixture display mode)
Code:
1Fh 77h n
n:
Display write mode
Definable area:
00h ≤ n ≤ 03h
n = 00h: Normal display write (not mixture display)
n = 01h: OR display write
n = 02h: AND display write
n = 03h: EX-OR display write
Default:
n = 00h or Memory SW setting.
Function:
Specifies write mixture mode.
Newly-written characters and images are combined with current display contents in Display Memory.
4.7.4.42
US ( w 01h a
(Window select)
Code:
1Fh 28h 77h 01h a
a:
Window number
a = 00h:
Base-Window
a = 01h – 04h:
User-Window
Definable area:
00h ≤ a ≤ 04h
Function:
Select current window.
Command is ignored if Window number is for a User-Window that is not defined.
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