riyyi
/
garbage
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

Doc: Clarify opcode mnemonic for 16-bit address registers 

When you see a 16-bit register wrapped by parentheses, its referencing
the value at the address the register is pointing to rather than the
address itself.
master
Riyyi 2 years ago
parent
e9b47d7d68
commit
589faceb9b
1 changed files with 1 additions and 1 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 2
      doc/terminology.org

2
doc/terminology.org
Unescape View File

@ -36,7 +36,7 @@ We start counting from the right as bit *#0*!
| register | 8 | unsigned | r8 | | r8 | r | | Any of the registers | | | register | 8 | unsigned | r8 | | r8 | r | | Any of the registers | |
| register | 16 | unsigned | r16 | | r16 | rr | | Any of the registers | little-endian | | register | 16 | unsigned | r16 | | r16 | rr | | Any of the registers | little-endian |
| address | 8 | unsigned | a8 | | | (n) | | Address at value | | | address | 8 | unsigned | a8 | | | (n) | | Address at value | |
| address | 16 | unsigned | a16 | a16 | n16 | (nn) | nn | Address at value | little-endian | | address | 16 | unsigned | a16 or () | a16 | n16 | (nn) | nn | Address at value | little-endian |
| immediate | 8 | signed | s8 | r8 | e8 | e | dd | Next byte in memory | | | immediate | 8 | signed | s8 | r8 | e8 | e | dd | Next byte in memory | |
| immediate | 8 | unsigned | io8 | (a8) | n16 | (n) | n | 0xff00 + next byte in memory | write to I/O-port | | immediate | 8 | unsigned | io8 | (a8) | n16 | (n) | n | 0xff00 + next byte in memory | write to I/O-port |
| condition | | | <ZNHC> | NZ | cc | | f | Execute if condition met | | | condition | | | <ZNHC> | NZ | cc | | f | Execute if condition met | |

Write Preview
Loading…
Cancel
Save