Epson S1C63000 - Manual (Page 104)

98 EPSON S1C63000 CORE CPU MANUAL
CHAPTER 4: INSTRUCTION SET
JRNC sign8 Jump to relative location sign8 if C flag is reset 1 cycle
Function: If C = 0 then PC
←
PC + sign8 + 1 (sign8 = -128~127)
Executes the "JR sign8" instruction if the C (carry) flag has been reset to "0", otherwise executes
the next instruction.
Code: Mnemonic MSB LSB
JRNC sign8 0 0 1 0 1 s7 s6 s5 s4 s3 s2 s1 s0 0500H–05FFH
Flags: E I C Z
↓
– – –
Mode: Signed 8-bit PC relative
Extended addressing: Valid
Extended LDB %EXT,imm8
operation: JRNC sign8 If C = 0 then PC
←
PC + sign16 + 1
(sign16 = -32768 to 32767, upper 8-bit: imm8, lower 8-bit: sign8)
JRNZ sign8 Jump to relative location sign8 if Z flag is reset 1 cycle
Function: If Z = 0 then PC
←
PC + sign8 + 1 (sign8 = -128~127)
Executes the "JR sign8" instruction if the Z (zero) flag has been set to "1", otherwise executes
the next instruction.
Code: Mnemonic MSB LSB
JRNZ sign8 0 0 1 1 1 s7 s6 s5 s4 s3 s2 s1 s0 0700H–07FFH
Flags: E I C Z
↓
– – –
Mode: Signed 8-bit PC relative
Extended addressing: Valid
Extended LDB %EXT,imm8
operation: JRNZ sign8 If Z = 0 then PC
←
PC + sign16 + 1
(sign16 = -32768 to 32767, upper 8-bit: imm8, lower 8-bit: sign8)