NEC PD17062 - Manual (Page 240)

240
µ
PD17062
TV screen
19 characters
14 rows
20. IMAGE DISPLAY CONTROLLER
The image display controller (IDC) function indicates a channel number, volume of sound, time, and other
information on a TV screen. The pattern of a display is user-programmable, and the display pattern definition
is stored in the CROM area.
The pattern to be actually displayed is stored in VRAM, which is mapped at BANK1 and BANK2 in data
memory.
20.1 SPECIFICATION OVERVIEW AND RESTRICTIONS
(1) Maximum number of characters that can be displayed on one screen: 97
This specification applies when one control code is used per row. The maximum number of characters
that can be displayed on one screen varies with the number of times control data is used.
Using the control data three times per row amounts to that it is possible to specify the color three times
per row.
(2) Variable display position range: 19 characters
×
14 rows
The display area is defined for the TV screen as follows:
(3) Up to 8 colors (including black and white) can be specified for individual characters.
Independent specification of R, G, and B (using control data Note )
Note Up to three control data items can be specified per row.
Character size
Maximum number of Number of times that
display characters per row control data is used per row
Standard (minimum) 19 Up to 3
Double size 9 Up to 6
Triple size 5 Up to 5
Quadruple size 4 Up to 4