X64sc Model Matrix

X64SC Model Matrix

Document Information

Field	Value
Backfill Plan	Backfill Imported Requirements To x64sc Parity
Target Emulator	x64sc
Last Updated	2026-05-14
Owning TODO	BACKFILL-MODEL-001

Scope

Vice-Sharp x64sc parity means the C64-family model surface must cover every x64sc variant, not only the default breadbox PAL machine. This matrix is the required selector/profile baseline for subsequent core, video, media, input, host, UI, and lockstep work.

Non-x64sc machines imported from the VICE documentation remain outside this backfill unless they are shared infrastructure used by the x64sc path.

Required Profiles

Profile ID	Required Selectors	Display Standard	Clock Hz	Raster Geometry	VIC-II	SID	Board	Keyboard	Cartridge Boot	ROM Resources
c64	c64, breadbox, pal, c64-pal, commodore64	PAL	985248	63 cycles x 312 lines	MOS6569	MOS6581	Breadbox	enabled	no	basic-901226-01.bin, kernal-901227-03.bin, chargen-901225-01.bin
c64c	c64c, c64new, newpal, c64c-pal	PAL	985248	63 cycles x 312 lines	MOS8565	MOS8580	C64C	enabled	no	basic-901226-01.bin, kernal-901227-03.bin, chargen-901225-01.bin
c64old	c64old, oldpal, c64old-pal	PAL	985248	63 cycles x 312 lines	MOS6569	MOS6581	BreadboxOld	enabled	no	basic-901226-01.bin, kernal-901227-02.bin, chargen-901225-01.bin
ntsc	ntsc, c64ntsc, c64-ntsc	NTSC	1022730	65 cycles x 263 lines	MOS6567R8	MOS6581	Breadbox	enabled	no	basic-901226-01.bin, kernal-901227-03.bin, chargen-901225-01.bin
newntsc	newntsc, c64cntsc, c64newntsc, c64c-ntsc	NTSC	1022730	65 cycles x 263 lines	MOS8562	MOS8580	C64C	enabled	no	basic-901226-01.bin, kernal-901227-03.bin, chargen-901225-01.bin
oldntsc	oldntsc, c64oldntsc, c64old-ntsc	NTSC	1022730	64 cycles x 262 lines	MOS6567R56A	MOS6581	BreadboxOld	enabled	no	basic-901226-01.bin, kernal-901227-01.bin, chargen-901225-01.bin
paln	paln, drean, c64-paln	PAL-N	1023440	65 cycles x 312 lines	MOS6572	MOS6581	Drean	enabled	no	basic-901226-01.bin, kernal-901227-03.bin, chargen-901225-01.bin
sx64pal	sx64, sx64pal, sx64-pal	PAL	985248	63 cycles x 312 lines	MOS6569	MOS6581	SX64	enabled	no	basic-901226-01.bin, kernal-251104-04.bin, chargen-901225-01.bin
sx64ntsc	sx64ntsc, sx64-ntsc	NTSC	1022730	65 cycles x 263 lines	MOS6567R8	MOS6581	SX64	enabled	no	basic-901226-01.bin, kernal-251104-04.bin, chargen-901225-01.bin
pet64pal	pet64, pet64pal, pet64-pal	PAL	985248	63 cycles x 312 lines	MOS6569	MOS6581	PET64	enabled	no	basic-901226-01.bin, kernal-901246-01.bin, chargen-901225-01.bin
pet64ntsc	pet64ntsc, pet64-ntsc	NTSC	1022730	65 cycles x 263 lines	MOS6567R8	MOS6581	PET64	enabled	no	basic-901226-01.bin, kernal-901246-01.bin, chargen-901225-01.bin
ultimax	ultimax, max	NTSC	1022730	65 cycles x 263 lines	MOS6567R8	MOS6581	Ultimax	enabled	yes	basic-901226-01.bin, kernal-none.bin, chargen-901225-01.bin; cartridge ROMH reset vector
c64gs	c64gs, gs	PAL	985248	63 cycles x 312 lines	MOS8565	MOS8580	C64GS	disabled	yes	basic-901226-01.bin, kernal-390852-01.bin, chargen-901225-01.bin; GS cartridge
c64jap	c64jap, jap	NTSC	1022730	65 cycles x 263 lines	MOS6567R8	MOS6581	Japanese	enabled	no	basic-901226-01.bin, kernal-906145-02.bin, chargen-906143-02.bin

Implementation Baseline

The current baseline provides a concrete model-profile catalog in C64MachineProfiles, exposes selected profile metadata through IProfiledArchitectureDescriptor, routes host session creation aliases through DefaultEmulatorRuntimeFactory, and applies profile timing, SID, keyboard, cartridge, and ROM-resource defaults in ArchitectureBuilder.

C64RomSet now resolves exact VICE ROM resource names for every x64sc profile through the configured VICE data root resolver. The workspace checkout is not expected to carry ROMs; local validation discovers the installed WinVICE data root from environment variables or x64sc.exe. Ultimax/MAX uses VICE's kernal-none.bin policy and takes the reset vector from cartridge ROMH in the deterministic lockstep path.

Lockstep Requirement

The final x64sc gate must run every profile above against native x64sc and compare CPU registers, flags, cycle count, selected memory windows, CIA/VIC/SID observable register state, IRQ/NMI state, and frame/raster checkpoints. A skipped, stubbed, unsupported, or missing-ROM profile is a blocker, not a pass.