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CHAPTER 4: ASSEMBLER
58 EPSON S5U1C63000A MANUAL
(S1C63 FAMILY ASSEMBLER PACKAGE)
Other numerical notations
The following numerical notations can also be used:
nnnnB: Binary numbers
nnnnO: Octal numbers
nnnnQ: Octal numbers
nnnnH: Hexadecimal numbers
"nnnnB" (binary numbers) and "nnnnH" (hexadecimal numbers) are converted into the new format
("0bnnnn" and "0xnnnn") in the preprocessing stage.
"nnnnO" and "nnnnQ" (octal numbers) are converted into hexadecimal numbers ("0xnnnn") in the
preprocessing stage.
ASCII to HEX conversion
One or two ASCII characters (enclosed with ' ') can be described in source files unless converting into
numbers. The numeric operators can also be used. The described characters are converted into ASCII
codes and delivered to the output relocatable object file.
Examples: retd '1' → (retd 0x31)
retd '23' → (retd 0x3233)
retd '4'+1 → (retd 0x35)
Note: Three or more characters and the following characters cannot be described:
Control codes (0x0 to 0x1f) space @ [ ] ; ,
4.5.8 Operators
An expression that consists of operators, numbers and/or defined symbols (including labels) can be used
for specifying a number or defining a Define name (only for number definition).
The preprocess in the assembler handles expressions in signed 16-bit data and expands them as hexadeci-
mal numbers.
Types of operators
Arithmetic operators Examples
+ Addition, Plus sign +0xff, 1+2
- Subtraction, Minus sign -1+2, 0xff-0b111
* Multiplication 0xf*5
/ Division 0x123/0x56
% Residue 0x123%0x56 (%% is also be supported.)
>> Shifting to right 1>>2
<< Shifting to left 0x113<<3
^H Acquires upper 8 bits 0x1234^H
^L Acquires lower 8 bits 0x1234^L
( ) Parenthesis 1+(1+2*5)
The arithmetic operator returns the result of arithmetic operation on the specified terms.
Logical operators Examples
& Bit AND 0b1101&0b111
| Bit OR 0b123|0xff
^ Bit XOR 12^35
~ Bit inversion ~0x1234
The logical operator returns the result of logic operation on the specified terms.