參數(shù)資料
型號(hào): NT6868AH
廠商: Electronic Theatre Controls, Inc.
英文描述: Keyboard Controller
中文描述: 鍵盤控制器
文件頁數(shù): 3/14頁
文件大小: 205K
代理商: NT6868AH
NT6868A
3
Functional Description
6502 CPU
6502 is an 8-bit CPU. Refer to 6502 data sheet for details.
ACCUMULATOR A
7
0
INDEX REGISTER X
7
0
INDEX REGISTER Y
7
0
PROGRAM COUNTER PC
15
0
S
7
0
7
0
S
V
B
D
I
Z
C
SIGN
OVERFOLW
BREAK
DECIMAL MODE
INTERRUPT MASK
ZERO
CARRY
STATUS REGISTER P
UNUSED
SYSTEM REGISTERS
UNUSED
USER ROM
SRAM
RST-L
IRQ-H
IRQ-L
RST-H
FFFF
FFFE
FFFD
FFFC
F000
00CF
00C0
007F
0000
STACK PTR
NMI VECTOR
IRQ VECTOR
FFFB
FFFA
NMI-L
NMI-H
STACK POINTER SP
Figure 1. 6502 CPU Registers and Status Flags
Figure 2. NT6868A Memory Map
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