W65C816S Datasheet, PDF (12/62 Pages) List of Unclassifed Manufacturers – Microprocessor

The Western Design Center, Inc.
W65C816S Data Sheet
Table 2-1 W65C816S Microprocessor Programming Model
8 BITS
Data Bank Register
(DBR)
Data Bank Register
(DBR)
00
Program Bank Register
(PBR)
00
Shaded blocks = 6502 registers
8 BITS
8 BITS
X Register (XH)
X Register (XL)
Y Register (YH)
Y Register (YL)
Stack Register (SH)
Stack Register (SL)
Accumulator (B) (C) Accumulator (A)
Program (PCH)
Counter (PCL)
Direct Register (DH)
Direct Register (DL)
1
B
BRK command:
1=BRK 0=IRQ
E
N
V
M
X
D
I
Z
C
Carry 1=true
Zero 1=result zero
IRQ disable 1=disable
Decimal mode 1=true
Index Register Select 1=8-bit, 0=16-bit
Memory Select 1=8-bit, 0=16-bit
Overflow 1=true
Emulation 1=6502 Emulation Mode
Negative 1=negative
0=Native Mode
The Western Design Center
W65C816S
12