M37221 Mitsubishi, M37221 Datasheet - Page 41

• Manufacturer Part Number: M37221
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

Table 11. Character code list (partially abbreviated)
Table 12. Contents of CRT display RAM
Character code
Block 1
Block 2
Block
00
01
02
03
7E
7F
80
81
FD
FE
FF
:
:
16
16
16
16
16
16
16
16
16
16
16
Left 8 dots lines
Display position (from left)
Not used
117DF
10030
1003F
107E0
107EF
107FF
11010
1101F
117D0
117E0
117EF
117FF
10000
1000F
10010
1001F
10020
1002F
107F0
11000
1100F
117F0
Character data storage address
to
to
to
to
to
to
to
to
to
to
to
24th character
:
:
1st character
2nd character
3rd character
22nd character
23rd character
1st character
2nd character
3rd character
22nd character
23rd character
24th character
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
:
:
Right 4 dots lines
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
11FDF
10FE0
10FEF
10FFF
11FD0
11FE0
11FEF
11FFF
10800
1080F
10810
1081F
10820
1082F
10830
1083F
10FF0
11800
1180F
11810
1181F
11FF0
to
to
to
to
to
to
to
to
to
to
to
:
:
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
Character code specification
M37221EF-XXXSP,M37221EFSP
The CRT display RAM is allocated at addresses 0600
and is divided into a display character code specification part and
display color specification part for each block. Table 12 shows the
contents of the CRT display RAM.
For example, to display 1 character position (the left edge) in block
1, write the character code in address 0600
register No. to the low-order 2 bits (bits 0 and 1) in address 0680
The color register No. to be written here is one of the 4 color regis-
ters in which the color to be displayed is set in advance. For details
on color registers, refer to (5) Color Registers. The structure of the
CRT display RAM is shown in Figure 45.
0617
0618
061F
0637
0600
0601
0602
0615
0616
0620
0621
0622
0635
0636
RAM for display (addresses 0600
:
to
:
16
16
16
16
16
16
16
16
16
16
16
16
16
16
with ON-SCREEN DISPLAY CONTROLLER
Color specification
16
to 06B7
0697
0680
0681
0682
0695
0696
0698
069F
06B7
06A0
06A1
06A2
06B5
06B6
16
:
to
:
and write the color
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
)
16
to 06B7
16
16
41
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