Instruction list, Symbols in the instruction list – Epson S5U1C63000A User Manual
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Instruction List (1)
S1C63000 Core CPU
Symbols in the Instruction List
Registers/Register Data
%A, A:
Data register A or the contents of the register (4 bits)
%B, B:
Data register B or the contents of the register (4 bits)
%BA, BA:
Data register BA or the contents of the register (8 bits, the B register is high-order 4 bits)
%X, X:
Index register X or the contents of the register (16 bits)
%XH, XH:
Index register XH or the contents of the register (high-order 8 bits of the X register)
%XL, XL:
Index register XL or the contents of the register (low-order 8 bits of the X register)
%Y, Y:
Index register Y or the contents of the register (16 bits)
%YH, YH:
Index register YH or the contents of the register (high-order 8 bits of the Y register)
%YL, YL:
Index register YL or the contents of the register (low-order 8 bits of the Y register)
%F, F:
Flag register F or the contents of the register (4 bits)
%EXT, EXT:
Extension register EXT or the contents of the register (8 bits)
%SP1, SP1:
Stack pointer SP1 or the contents of the stack pointer (16 bits, setting data = SP1(9:2))
%SP2, SP2:
Stack pointer SP2 or the contents of the stack pointer (16 bits, setting data = SP2(7:0))
PC:
Contents of the program counter PC (16 bits)
Memory/Addresses/Memory Data
[%X], [X]:
Register indirect addressing using X, or the contents of the specified memory
[%Y], [Y]:
Register indirect addressing using Y, or the contents of the specified memory
[00addr6]:
6-bit absolute addressing with addr6, or the contents of the specified memory (0x0000–0x003F)
[FFaddr6]:
6-bit absolute addressing with addr6, or the contents of the specified memory (0xFFC0–0xFFFF)
[00imm8]:
8-bit absolute addressing with imm8, or the contents of the specified memory (0x0000–0x00FF)
[FFimm8]:
8-bit absolute addressing with imm8, or the contents of the specified memory (0xFF00–0xFFFF)
[%SP1], [SP1]: 16-bit stack specification or the contents of the stack address
[%SP2], [SP2]: 4-bit stack specification or the contents of the stack address
Immediate Data
immN:
N-bit unsigned immediate data (N = 2, 4, 6 or 8)
i7–i0:
Bit data of immN
n4:
4-bit radix specification data
n3–n0:
Bit data of n4
sign8:
Signed 8-bit immediate data
s7–s0:
Bit data of sign8
addr6:
6-bit absolute address
a5–a0:
Bit data of addr6
00addr6:
An address (0x0000–0x003F) specified with addr6
FFaddr6:
An address (0xFFC0–0xFFFF) specified with addr6
Functions
←
:
Indicates that the right item is loaded or set to the left item.
↔
:
Indicates that data is exchanged between the right and left items.
+:
Addition
-:
Subtraction
∧
:
AND
∨
:
OR
∀
:
XOR
Flags
Z:
Zero flag
C:
Carry flag
I:
Interrupt flag
E:
Extension flag
–:
Not changed
↔
:
Set (1), reset (0) or not changed
1:
Set (1)
0:
Reset (0)
Clk
Indicates the number of execution cycles.
Symbol
●
Indicates that a symbol can be used for the operand instead of an 8-bit or 6-bit
immediate data. However, the symbol value must be within the range that can be
specified. If a symbol mask is listed, the instruction can use the symbol mask for the
operand in addition to a symbol.
Symbol mask
@l:
Acquires the low-order 8 bits of an absolute address.
@h:
Acquires the high-order 8 bits of an absolute address.
@rl:
Acquires the low-order 8 bits of a relative address.
@rh:
Acquires the high-order 8 bits of a relative address.
@xh:
Acquires the inverted high-order 8 bits of an absolute address.
Note
The "Extended function" shows the operation of the instruction when
"LDB %EXT, imm8" is executed prior to the instruction.