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Part Name
Description
NT6880 View Datasheet(PDF) - Novatek Microelectronics
Part Name
Description
Manufacturer
NT6880
Keyboard Controller
Novatek Microelectronics
NT6880 Datasheet PDF : 13 Pages
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Functional Description
1. 6502 CPU
The 6502 is an 8-bit CPU. Please refer to the 6502 data sheet for more details.
NT6880
7
0
ACCUMULATOR A
7
0
INDEX REGISTER X
7
0
INDEX REGISTER Y
0000
009F
00C0
00CF
SRAM
UNUSED
SYSTEM REGISTERS
STACK PTR
15
0
PROGRAM COUNTER PC
UNUSED
7
0
EC00
S
STACK POINTER SP
7
SV
0
B D I Z C STATUS REGISTER P
CARRY
ZERO
INTERRUPT MASK
DECIMAL MODE
BREAK
OVERFOLW
SIGN
FFFA
FFFB
FFFC
FFFD
FFFE
FFFF
USER ROM
NMI-L
NMI-H
RST-L
RST-H
IRQ-L
IRQ-H
NMI VECTOR
IRQ VECTOR
Figure 1.1 6502 CPU Registers and Status Flags
Figure 1.2. NT6880 Memory Map
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