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File:  [RetroPC.NET] / np2 / i286a / memory.c
Revision 1.8: download - view: text, annotated - select for diffs
Mon Dec 22 16:41:15 2003 JST (21 years, 10 months ago) by yui
Branches: MAIN
CVS tags: VER_0_80, VER_0_79, VER_0_78, VER_0_77, VER_0_76, VER_0_75, VER_0_74, VER_0_73, HEAD
fix i286a (T.Yui)

#include	"compiler.h"
#include	"cpucore.h"

#define	USE_HIMEM		0x110000

void MEMCALL i286_memstr_read(UINT seg, UINT off, void *dat, UINT leng) {

	BYTE	*out;
	UINT32	adrs;
	UINT	size;

	out = (BYTE *)dat;
	adrs = seg << 4;
	off = LOW16(off);
	if ((I286_MEMREADMAX >= 0x10000) &&
		(adrs < (I286_MEMREADMAX - 0x10000))) {
		if (leng) {
			size = 0x10000 - off;
			if (size >= leng) {
				CopyMemory(out, mem + adrs + off, leng);
				return;
			}
			CopyMemory(out, mem + adrs + off, size);
			out += size;
			leng -= size;
		}
		while(leng >= 0x10000) {
			CopyMemory(out, mem + adrs, 0x10000);
			out += 0x10000;
			leng -= 0x10000;
		}
		if (leng) {
			CopyMemory(out, mem + adrs, leng);
		}
	}
	else {
		while(leng--) {
			*out++ = i286_memoryread(adrs + off);
			off = LOW16(off + 1);
		}
	}
}

void MEMCALL i286_memstr_write(UINT seg, UINT off,
												const void *dat, UINT leng) {

	BYTE	*out;
	UINT32	adrs;
	UINT	size;

	out = (BYTE *)dat;
	adrs = seg << 4;
	off = LOW16(off);
	if ((I286_MEMWRITEMAX >= 0x10000) &&
		(adrs < (I286_MEMWRITEMAX - 0x10000))) {
		if (leng) {
			size = 0x10000 - off;
			if (size >= leng) {
				CopyMemory(mem + adrs + off, out, leng);
				return;
			}
			CopyMemory(mem + adrs + off, out, size);
			out += size;
			leng -= size;
		}
		while(leng >= 0x10000) {
			CopyMemory(mem + adrs, out, 0x10000);
			out += 0x10000;
			leng -= 0x10000;
		}
		if (leng) {
			CopyMemory(mem + adrs, out, leng);
		}
	}
	else {
		while(leng--) {
			i286_memorywrite(adrs + off, *out++);
			off = LOW16(off + 1);
		}
	}
}

void MEMCALL i286_memx_read(UINT32 address, void *dat, UINT leng) {

	if ((address + leng) < I286_MEMREADMAX) {
		CopyMemory(dat, mem + address, leng);
	}
	else {
		BYTE *out = (BYTE *)dat;
		if (address < I286_MEMREADMAX) {
			CopyMemory(out, mem + address, I286_MEMREADMAX - address);
			out += I286_MEMREADMAX - address;
			leng -= I286_MEMREADMAX - address;
			address = I286_MEMREADMAX;
		}
		while(leng--) {
			*out++ = i286_memoryread(address++);
		}
	}
}

void MEMCALL i286_memx_write(UINT32 address, const void *dat, UINT leng) {

const BYTE	*out;

	if ((address + leng) < I286_MEMWRITEMAX) {
		CopyMemory(mem + address, dat, leng);
	}
	else {
		out = (BYTE *)dat;
		if (address < I286_MEMWRITEMAX) {
			CopyMemory(mem + address, out, I286_MEMWRITEMAX - address);
			out += I286_MEMWRITEMAX - address;
			leng -= I286_MEMWRITEMAX - address;
			address = I286_MEMWRITEMAX;
		}
		while(leng--) {
			i286_memorywrite(address++, *out++);
		}
	}
}
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