Wyse WY-30 User Manual

If the high order bit is 1 and the next two bits are not 00, then
the character is displayed with the hidden attribute specified by
the screen attribute byte. Any other combination of attribute
bits is displayed with no attribute or the currently loaded
ser ia 1 at tr i bu te. Tab I.e 6- 3 shows the at tr i bu te assignmen ts.
Table 6-3 Screen Attribute Assignments
OOOxxxxx Graphics character (cannot be displayed with
hidden attribute)
100RUSBD = Serial attribute:
R = Reverse (inverts video)
U = Underline (places underline at scan line 9)
S = Security (or blank--blanks only video dots)
B = Blink (blinks video dots and underline)
D = Dim (dims video)
Attributes are combined using the following Boolean function:
v = Output of video shift register
C = Cursor
E = Display enabled (not retracing)
L = Scan line 11 (last scan line)
N = Nonhidden (serial) attribute
o = Output of blink oscillator
BL = 0 AND B
UL = U AND L
VIDEO = E AND (N AND (BL AND (S AND V) OR UL) XOR R) XOR C)
DIM = E AND NAND D
Video Character Data
The video character data is generated by the character generator,
and sent to the gate array. This data is combined with the
attribute data and appears as serial data at the VIDEO pin. Bit
7 appears firs t (on the 1 eft), fo 11 owed by bi ts 6 through O. Bit
o is displayed twice in a row at the right side of the current
character cell, and is displayed as the first (leftmost) dot of
the next character cell. Each character cell is 10 dots wide.
Screen Attributes
There are nine attributes that, when set, apply to the whole
screen. These are true reverse and alternate attribute (ATM),
screen blank, and six protect modes.
o True reverse inverts the screen display.
6-7

Wyse WY-30 Specifications

General

Brand	Wyse
Model	WY-30
Category	Touch terminals
Language	English