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#include	"compiler.h"
#include	"resource.h"
#include	"np2.h"
#include	"viewer.h"
#include	"viewmem.h"
#include	"cpucore.h"


void viewmem_read(VIEWMEM_T *cfg, UINT32 adrs, UINT8 *buf, UINT32 size) {

	if (!size) {
		return;
	}

	// Main Memory
	if (adrs < 0xa4000) {
		if ((adrs + size) <= 0xa4000) {
			CopyMemory(buf, mem + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0xa4000 - adrs;
			CopyMemory(buf, mem + adrs, len);
			buf += len;
			size -= len;
			adrs = 0xa4000;
		}
	}

	// CG-Window‚Í–³Ž‹
	if (adrs < 0xa5000) {
		if ((adrs + size) <= 0xa5000) {
			ZeroMemory(buf, size);
			return;
		}
		else {
			UINT32 len;
			len = 0xa5000 - adrs;
			ZeroMemory(buf, len);
			buf += len;
			size -= len;
			adrs = 0xa5000;
		}
	}

	// Main Memory
	if (adrs < 0xa8000) {
		if ((adrs + size) <= 0xa8000) {
			CopyMemory(buf, mem + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0xa8000 - adrs;
			CopyMemory(buf, mem + adrs, len);
			buf += len;
			size -= len;
			adrs = 0xa8000;
		}
	}

	// Video Memory
	if (adrs < 0xc0000) {
		UINT32 page;
		page = ((cfg->vram)?VRAM_STEP:0);
		if ((adrs + size) <= 0xc0000) {
			CopyMemory(buf, mem + page + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0xc0000 - adrs;
			CopyMemory(buf, mem + page + adrs, len);
			buf += len;
			size -= len;
			adrs = 0xc0000;
		}
	}

	// Main Memory
	if (adrs < 0xe0000) {
		if ((adrs + size) <= 0xe0000) {
			CopyMemory(buf, mem + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0xe0000 - adrs;
			CopyMemory(buf, mem + adrs, len);
			buf += len;
			size -= len;
			adrs = 0xe0000;
		}
	}

	// Video Memory
	if (adrs < 0xe8000) {
		UINT32 page;
		page = ((cfg->vram)?VRAM_STEP:0);
		if ((adrs + size) <= 0xe8000) {
			CopyMemory(buf, mem + page + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0xe8000 - adrs;
			CopyMemory(buf, mem + page + adrs, len);
			buf += len;
			size -= len;
			adrs = 0xe8000;
		}
	}

	// BIOS
	if (adrs < 0x0f8000) {
		if ((adrs + size) <= 0x0f8000) {
			CopyMemory(buf, mem + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0x0f8000 - adrs;
			CopyMemory(buf, mem + adrs, len);
			buf += len;
			size -= len;
			adrs = 0x0f8000;
		}
	}

	// BIOS/ITF
	if (adrs < 0x100000) {
		UINT32 page;
		page = ((cfg->itf)?VRAM_STEP:0);
		if ((adrs + size) <= 0x100000) {
			CopyMemory(buf, mem + page + adrs, size);
			return;
		}
		else {
			UINT32 len;
			len = 0x100000 - adrs;
			CopyMemory(buf, mem + page + adrs, len);
			buf += len;
			size -= len;
			adrs = 0x100000;
		}
	}

	// HMA
	if (adrs < 0x10fff0) {
		UINT32 adrs2;
		adrs2 = adrs & 0xffff;
		adrs2 += ((cfg->A20)?VRAM_STEP:0);
		if ((adrs + size) <= 0x10fff0) {
			CopyMemory(buf, mem + adrs2, size);
			return;
		}
		else {
			UINT32 len;
			len = 0x10fff0 - adrs;
			CopyMemory(buf, mem + adrs2, len);
			buf += len;
			size -= len;
			adrs = 0x10fff0;
		}
	}
}