// Copyright (c) 1995 - 2026 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause

#include "MmuZx81.h"
#include "Machine.h"
#include "Mmu.h"
#include "Ula/UlaZx81.h"
#include "Z80/Z80.h"


namespace zxsp
{

void MmuZx81::powerOn(/*t=0*/ int32 cc)
{
	MmuZx80::powerOn(cc);
	assert(romdis_in == 0);
}

void MmuZx81::romCS(bool f)
{
	// ROMCS input was activated/deactivated
	// MMU.ROMCS handles paging of internal ROM.
	// => no need to forward it's own ROMCS state as well.
	//
	// In general items should not actively unmap their memory as result of incoming ROMCS.
	// Instead they should trust that the sender will map it's rom into the Z80's memory space.
	// While the ROMCS input is active, items must not page in their memory, just store
	// values written to their registers only.

	// ROM_CS:  1->disable

	xlogline("MmuZx81.romCS(%i)", f);
	assert(dynamic_cast<UlaZx81*>(ula));

	if (f == romdis_in) return;
	romdis_in = f;
	if (f) return; // paged out

	if ((rom[0] & cpu_waitmap) == 0)
	{
		for (uint i = 0; i < rom.count(); i++) rom[i] |= cpu_waitmap;
	}

	uint16 rom_size = uint16(rom.count());
	if (rom_size > 8 kB) rom_size = 8 kB;
	uint8* waitmap		= static_cast<UlaZx81*>(ula)->getWaitmap();
	uint16 waitmap_size = static_cast<UlaZx81*>(ula)->waitmap_size;
	cpu->mapRom(0, rom_size, &rom[0], waitmap, waitmap_size);
}

} // namespace zxsp