Machine options¶

This file is generated from MachineOptionRegistry by 5do settings options --format markdown. Do not edit the table by hand; update the registry and regenerate the file.

Each option is validated by the machine, reachable from the CLI, desktop settings, and per-game profiles, and recorded in save states.

Key	CLI	Settings	Profile	Type	Default	Range	State	Description
cpuClock	--cpu-clock	CpuClockMultiplier	CpuClockMultiplier	number	1x (12.5 MHz)	0.5x-4x (6.25-50 MHz)	yes	ARM60 clock multiplier. 1x is the stock 12.5 MHz; 0.5x-4x is supported.
region	--region	Region	Region	enum (VideoRegion)	Ntsc	Ntsc, Pal1, Pal2	yes	NTSC 320x240 at 60 Hz, PAL1 320x288 at 50 Hz, or PAL2 384x288 at 50 Hz.
armTiming	--arm-timing	ArmTiming	ArmTiming	enum (ArmTimingMode)	FreeDoCompatible	FreeDoCompatible, Arm60Datasheet	yes	ARM60 N-cycle class: FreeDO-compatible N=4 or the ARM60 datasheet N=2.
clioTimers	--clio-timers	ClioTimers	ClioTimers	enum (ClioTimerMode)	FreeDoCompatible	FreeDoCompatible, OperaScheduler	yes	CLIO timer scan: FreeDO's all-timer scan or Opera's per-slot scheduler.
celTiming	--cel-timing	CelTiming	CelTiming	enum (CelTimingMode)	FreeDoCompatible	FreeDoCompatible, OperaBusy	yes	MADAM CEL timing: synchronous FreeDO draws or Opera's pixel/texel busy deadline.
cdromTiming	--cd-timing	CdromTiming	CdromTiming	enum (CdromTimingMode)	FreeDoCompatible	FreeDoCompatible, OperaCycleBased	yes	CD-ROM data-sector timing: immediate FreeDO transfers or Opera's cycle-based readiness.
cdSpeed	--cd-speed	CdSpeed	CdSpeed	enum (CdSpeed)	X2	Unbounded, X1, X2, X4, X8, X16, X24, X32	yes	Effective read speed for the cycle-based CD-ROM model. The stock 3DO drive is 2x.
memory	--memory	MemoryConfiguration	MemoryConfiguration	enum (MemoryConfiguration)	2 MB DRAM / 1 MB VRAM (21)	21, 22, 41, 42, 81, 82, E2, F1 (DRAM/VRAM in MB)	yes	DRAM/VRAM capacity. The stock machine has 2 MB DRAM and 1 MB VRAM; expanded layouts change the RAM boundary and VRAM base.
randomSeed	--random-seed	RandomSeed	RandomSeed	seed	default (0xa5a5a5a5)	default or a 32-bit value	yes	Initial DSP PRNG seed. Blank uses FreeDO's default 0xa5a5a5a5.
fixMode	--fix-mode	FixModeOverrides	FixMode	flags	None	0x00000000-0xFFFFFFFF	yes	Per-game 4DO compatibility fix mask.
cpuBackend	--cpu-backend	CpuBackend	CpuBackend	enum (CpuBackendKind)	Interpreter	Interpreter, Jit	yes	Guest ARM60 backend. Interpreter is the reference; JIT compiles hot blocks and falls back safely.
highResolution	--high-res	HighResolution	HighResolution	boolean	disabled	enabled, disabled	yes	Opt-in 640x480 CEL/VDLP rendering.
operaDipir	--opera-dipir	OperaDipir	OperaDipir	boolean	disabled	enabled, disabled	yes	CLIO DIPIR latches and XBUS access aborts.
operaSoftReset	--opera-soft-reset	OperaSoftReset	OperaSoftReset	boolean	disabled	enabled, disabled	yes	CLIO CSTAT soft resets use Opera's ARM/MADAM/DSP reset path.
swiHle	--swi-hle	SwiHle	SwiHle	boolean	disabled	enabled, disabled	yes	Handle Portfolio OS fixed-point math SWIs on the host instead of running the guest implementation.