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Emualtor improements

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Aiden
2026-05-25 18:55:50 +10:00
parent 05e1237acc
commit 1fabf6587d
10 changed files with 413 additions and 15 deletions
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53
tests/test_emulator_timers.py
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@@ -4,9 +4,12 @@ from h8536.emulator import H8536Emulator, ON_CHIP_RAM_START
from h8536.emulator.constants import (
FRT_TCR_OCIEA,
FRT_TCSR_OCFA,
FRT1_TCR,
FRT1_TCSR,
FRT2_TCR,
FRT2_TCSR,
IPRC,
VECTOR_FRT1_OCIA,
VECTOR_FRT2_OCIA,
)
@@ -23,6 +26,56 @@ def write_mov_b_abs_imm(rom: bytearray, address: int, target: int, value: int) -
class Frt2OciaTimerTest(unittest.TestCase):
def test_frt1_ocia_vector_can_fire_and_decrement_ram(self):
rom = rom_with_reset()
rom[VECTOR_FRT1_OCIA : VECTOR_FRT1_OCIA + 2] = (0x1020).to_bytes(2, "big")
pc = 0x1000
rom[pc : pc + 3] = b"\x5F\xFE\x80" # MOV:I.W #H'FE80, R7
pc += 3
# IPRC bits 6..4 are FRT1 and bits 2..0 are FRT2, so H'60 makes
# only the FRT1 priority field high enough to pass interrupt mask 0.
pc = write_mov_b_abs_imm(rom, pc, IPRC, 0x60)
pc = write_mov_b_abs_imm(rom, pc, FRT1_TCR, FRT_TCR_OCIEA)
rom[pc : pc + 2] = b"\x20\xFE" # BRA self
isr = 0x1020
rom[isr : isr + 4] = bytes([0x15, (ON_CHIP_RAM_START >> 8) & 0xFF, ON_CHIP_RAM_START & 0xFF, 0x0C])
isr += 4
rom[isr : isr + 4] = bytes([0x15, (FRT1_TCSR >> 8) & 0xFF, FRT1_TCSR & 0xFF, 0xD5])
rom[isr + 4] = 0x0A # RTE
emulator = H8536Emulator(bytes(rom), frt1_ocia_steps=2)
emulator.memory.write8(ON_CHIP_RAM_START, 3)
emulator.run(max_steps=5)
self.assertEqual(emulator.memory.read8(ON_CHIP_RAM_START), 2)
self.assertFalse(emulator.memory.read8(FRT1_TCSR) & FRT_TCSR_OCFA)
self.assertEqual(emulator.cpu.pc, isr + 4)
def test_frt1_ocia_does_not_fire_when_ociea_disabled(self):
rom = rom_with_reset()
rom[VECTOR_FRT1_OCIA : VECTOR_FRT1_OCIA + 2] = (0x1020).to_bytes(2, "big")
pc = 0x1000
rom[pc : pc + 3] = b"\x5F\xFE\x80" # MOV:I.W #H'FE80, R7
pc += 3
pc = write_mov_b_abs_imm(rom, pc, IPRC, 0x60)
rom[pc : pc + 2] = b"\x20\xFE" # BRA self
rom[0x1020 : 0x1024] = bytes(
[0x15, (ON_CHIP_RAM_START >> 8) & 0xFF, ON_CHIP_RAM_START & 0xFF, 0x0C]
)
rom[0x1024] = 0x0A # RTE
emulator = H8536Emulator(bytes(rom), frt1_ocia_steps=1)
emulator.memory.write8(ON_CHIP_RAM_START, 3)
emulator.run(max_steps=8)
self.assertEqual(emulator.memory.read8(ON_CHIP_RAM_START), 3)
self.assertEqual(emulator.memory.read8(FRT1_TCSR) & FRT_TCSR_OCFA, 0)
self.assertEqual(emulator.cpu.pc, pc)
def test_frt2_ocia_vector_can_fire_and_decrement_ram(self):
rom = rom_with_reset()
rom[VECTOR_FRT2_OCIA : VECTOR_FRT2_OCIA + 2] = (0x1020).to_bytes(2, "big")