Row; Row Attribute Register - Motorola MC68HC05T16 Technical Data Manual

Bit definitions may be reversed, depending on the chroma unit in the TV
9.4

Row

The OSD module has 4 row buffers for displaying on-screen characters; row 0, 1, 2 and 3. Each
row buffer consists of 32 pairs of Character register pairs (See Section 9.3). There are 5 registers
which affects the position and attributes of the display rows.
9.4.1

Row Attribute Register

Address bit 7
$23 MTRX3
MTRXi - Character dot matrix select for row i
1 (set) – 12x16 character dot matrix selected for row i.
0 (clear) – 16x16 character dot matrix selected for row i.
If 12x16 matrix is selected, a maximum of 32 characters may be displayed for that row. Rows
selected for 16x16 matrix characters, the maximum is 24 characters per row; the remaining 8
MC68HC05T16
Table 9-1 RGB Color Map
Ii Ri Gi
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
0 1 0
0 1 1
0 1 1
1 0 0
1 0 0
1 0 1
1 0 1
1 1 0
1 1 0
1 1 1
1 1 1
bit 6 bit 5 bit 4
MTRX2 MTRX1 MTRX0
ON-SCREEN DISPLAY
Bi Color
0 Black
1 Blue
0 Green
1 Cyan
0 Red
1 Magenta
0 Yellow
1 White
0 Dark Grey
1 Dark Blue
0 Dark Green
1 Dark Cyan
0 Dark Red
1 Dark Magenta
0 Dark Yellow
1 Light Grey
bit 3 bit 2 bit 1
R3BE R2BE R1BE
State
bit 0
on reset
R0BE 0000 0000
TPG
MOTOROLA
9-7
9