Chapter 2 Initial Reset; Internal Register Status On Initial Reset - Epson E0C6001 Technical Manual

CHAPTER 2
Table 2.1.1
Initial values of internal
registers
Table 2.1.2
Initial values of internal data
memory area
INITIAL RESET
2.1

Internal Register Status on Initial Reset

Following an initial reset, the internal registers and internal
data memory area are initialized to the values shown in
Tables 2.1.1 and 2.1.2.
Internal Register
Program counter step
Program counter page PCP
New page pointer
Stack pointer
Index register
Index register
Register pointer
General register
General register
Interrupt flag
Decimal flag
Zero flag
Carry flag
Internal Data
Memory Area
RAM data
Display memory
Internal I/O register
Bit Length
PCS 8
4
NPP 4
SP 8
X 8
Y 8
RP 4
A 4
B 4
I 1
D 1
Z 1
C 1
Initial Value
Bit Length
Following Reset
4 × 80
Undefined
4 × 20
Undefined
See Tables 1.4.1(a)–1.4.1(d)
CHAPTER 2: INITIAL RESET
Initial Value Following Reset
00H
1H
1H
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
0
0
Undefined
Undefined
Address
000H–05FH
090H–0AFH
0E0H–0FDH
II-9