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Implement SCRU operation #19

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Jul 9, 2024
Merged

Implement SCRU operation #19

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -189,6 +189,7 @@ specifications, as well as pseudo operations.

| Mnemonic | Opcode | Operands | Description |
|------------|--------|:--------:|-------------------------------------------------------|
| `SCRU` | `00Dn` | 1 | Scrolls the current bitplane up `n` pixels |
| `SAVESUB` | `5st2` | 2 | Saves subset of registers from `s` to `t` in memory |
| `LOADSUB` | `5st3` | 2 | Loads subset of registers from `s` to `t` from memory |
| `AUDIO` | `F002` | 0 | Load 16-byte audio pattern buffer from `index` |
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1 change: 1 addition & 0 deletions chip8asm/statement.py
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Expand Up @@ -70,6 +70,7 @@
Operation(op="Fs75", operands=1, source=1, target=0, numeric=0, mnemonic="SRPL"),
Operation(op="Fs85", operands=1, source=1, target=0, numeric=0, mnemonic="LRPL"),
# XO Chip Instructions
Operation(op="00Dn", operands=1, source=0, target=0, numeric=1, mnemonic="SCRU"),
Operation(op="5st2", operands=2, source=1, target=1, numeric=0, mnemonic="SAVESUB"),
Operation(op="5st3", operands=2, source=1, target=1, numeric=0, mnemonic="LOADSUB"),
Operation(op="F002", operands=0, source=0, target=0, numeric=0, mnemonic="AUDIO"),
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9 changes: 9 additions & 0 deletions test/test_integration.py
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Expand Up @@ -79,4 +79,13 @@ def test_loadsub_mnemonic_translate_correct(self):
machine_code = program.generate_machine_code()
self.assertEqual([0x51, 0x63], machine_code)

def test_scrollup_mnemonic_translate_correct(self):
program = Program()
statement = Statement()
statement.parse_line(" SCRU 5 ; scroll up statement")
program.statements.append(statement)
program = self.translate_statements(program)
machine_code = program.generate_machine_code()
self.assertEqual([0x00, 0xD5], machine_code)

# E N D O F F I L E #######################################################
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