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HMCS46C,HMCS46CL--------------------------------------------------------
I
(Page Part)
~
Bank Part
{ \ r - -
Page Part
~;----
Address Part
~
(Data for Modification)
~ ~.=
:1= :0
I
C
I
B, : B. : B I : Bo
I
A, : A.: AI : Ao
I
r-"-T-T-T-T-T-T-,-"T-"T-'--'
(Reference
I
PC
II
I
PC IO PC.
I
PC. I PC, I PC, I BIB
I A
I A I A
I
A
I
ROM address)
L
+~
•
..1
~~
1
+~0..1..
+: .J.
+~~ +~
•
..L
_1..1
_0..L _'
.J.
_'.L
_I ..... _0.J
Figure 4 ROM Addressing for Pattern Generation
Table 2 Bank Part Truth Table of Pattern Generation
PC
11
p.
Bank part of ROM address
to be referenced to
1
(Bank
1)
1
1
(Bank
11
0
1
(Bank
11
o
(Bank
01
1
1
(Bank
11
0
o
(Bank
01
I
0.
0 :
o. : o. :
0, : 0, : 05 : 0
4
:
0
3 : O. : O.
I
Pattern of ROM
Loaded into the accumulator
and B register
[~: ~
"'I,-R-'-OT:-R-.-.
r:
-R-"-':-R-u-,,r--R-30.,:r-R-,-.T:-R-3-'
r:
-R- ,
",I
;~~::~sinto
the R2 and R3
Figure 5 Correspondence of Each Bit of Pattern
Table 3 Example of Pattern Instructions Usage
Before Execution
Referred ROM
ROM
After Execution
PC
p
C
B
A
Address
Bank 00·3F
1
0
A
0
Bank 010-20
(0·3F)
(10·20)
Bank 00·3F
7
1
4
0
Bank 1 29-00
(0·3F)
(61·00)
Bank 130-00
4
0/1**
0
9
Bank 1 30-09
(62·00)
(62·09)
Bank 1 30-00
1
0/1**
F
9
Bank 1 31·39
(62·00)
(63·39)
• "-" meens thet the velue doel not chenge after axecutlon of tha Instruction.
•• "0/1"
means thet either
"0"
or
"1"
mev be selected.
92
Pattern
B
A
R2
120
2
B
-
220
-
-
4
320
2
B
4
223
-
-
4
R3
*
-
B
B
C
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