.A
EM instructions without arguments have a single opcode assigned,
possibly escaped:
-.Dr 14
+.Dr 6
|--------------|
| opcode |
|--------------|
- or
+.De
+ or
+.Dr 6
|--------------|--------------|
| escape | opcode |
.N 1
There is always an opcode that takes the next two bytes as argument,
high byte first:
-.Dr 14
+.Dr 6
|--------------|--------------|--------------|
| opcode | hibyte | lobyte |
|--------------|--------------|--------------|
- or
+.De
+ or
+.Dr 6
|--------------|--------------|--------------|--------------|
| escape | opcode | hibyte | lobyte |
into a single opcode.
These opcodes are called shorties.
Shorties may be escaped.
-.Dr 14
+.Dr 6
|--------------|--------------|
| opcode+high | lobyte | (shortie)
|--------------|--------------|
- or
+.De
+ or
+.Dr 6
|--------------|--------------|--------------|
| escape | opcode+high | lobyte |