#include	"compiler.h"
#include	"cpucore.h"
#include	"pccore.h"
#include	"iocore.h"
#include	"memtram.h"
#include	"vram.h"
#include	"font.h"


REG8 MEMCALL memtram_rd8(UINT32 address) {

	CPU_REMCLOCK -= MEMWAIT_TRAM;
	if (address < 0xa4000) {
		return(mem[address]);
	}
	else if (address < 0xa5000) {
		if (address & 1) {
			return(fontrom[cgwindow.high + ((address >> 1) & 0x0f)]);
		}
		else {
			return(fontrom[cgwindow.low + ((address >> 1) & 0x0f)]);
		}
	}
	return(mem[address]);
}

REG16 MEMCALL memtram_rd16(UINT32 address) {

	CPU_REMCLOCK -= MEMWAIT_TRAM;
	if (address < (0xa4000 - 1)) {
		return(LOADINTELWORD(mem + address));
	}
	else if (address == 0xa3fff) {
		return(mem[address] + (fontrom[cgwindow.low] << 8));
	}
	else if (address < 0xa4fff) {
		if (address & 1) {
			REG16 ret;
			ret = fontrom[cgwindow.high + ((address >> 1) & 0x0f)];
			ret += fontrom[cgwindow.low + (((address + 1) >> 1) & 0x0f)] << 8;
			return(ret);
		}
		else {
			REG16 ret;
			ret = fontrom[cgwindow.low + ((address >> 1) & 0x0f)];
			ret += fontrom[cgwindow.high + ((address >> 1) & 0x0f)] << 8;
			return(ret);
		}
	}
	else if (address == 0xa4fff) {
		return((mem[0xa5000] << 8) | fontrom[cgwindow.high + 15]);
	}
	return(LOADINTELWORD(mem + address));
}

void MEMCALL memtram_wr8(UINT32 address, REG8 value) {

	CPU_REMCLOCK -= MEMWAIT_TRAM;
	if (address < 0xa2000) {
		mem[address] = (UINT8)value;
		tramupdate[LOW12(address >> 1)] = 1;
		gdcs.textdisp |= 1;
	}
	else if (address < 0xa3fe0) {
		if (!(address & 1)) {
			mem[address] = (UINT8)value;
			tramupdate[LOW12(address >> 1)] = 1;
			gdcs.textdisp |= 1;
		}
	}
	else if (address < 0xa4000) {
		if (!(address & 1)) {
			if ((!(address & 2)) || (gdcs.msw_accessable)) {
				mem[address] = (UINT8)value;
				tramupdate[LOW12(address >> 1)] = 1;
				gdcs.textdisp |= 1;
			}
		}
	}
	else if (address < 0xa5000) {
		if ((address & 1) && (cgwindow.writable & 1)) {
			cgwindow.writable |= 0x80;
			fontrom[cgwindow.high + ((address >> 1) & 0x0f)] = (UINT8)value;
		}
	}
}

void MEMCALL memtram_wr16(UINT32 address, REG16 value) {

	CPU_REMCLOCK -= MEMWAIT_TRAM;
	if (address < 0xa1fff) {
		STOREINTELWORD(mem + address, value);
		tramupdate[LOW12(address >> 1)] = 1;
		tramupdate[LOW12((address + 1) >> 1)] = 1;
		gdcs.textdisp |= 1;
	}
	else if (address == 0xa1fff) {
		STOREINTELWORD(mem + address, value);
		tramupdate[0] = 1;
		tramupdate[0xfff] = 1;
		gdcs.textdisp |= 1;
	}
	else if (address < 0xa3fe0) {
		if (address & 1) {
			address++;
			value >>= 8;
		}
		mem[address] = (UINT8)value;
		tramupdate[LOW12(address >> 1)] = 1;
		gdcs.textdisp |= 1;
	}
	else if (address < 0xa3fff) {
		if (address & 1) {
			address++;
			value >>= 8;
		}
		if ((!(address & 2)) || (gdcs.msw_accessable)) {
			mem[address] = (UINT8)value;
			tramupdate[LOW12(address >> 1)] = 1;
			gdcs.textdisp |= 1;
		}
	}
	else if (address < 0xa5000) {
		if (!(address & 1)) {
			value >>= 8;
		}
		if (cgwindow.writable & 1) {
			cgwindow.writable |= 0x80;
			fontrom[cgwindow.high + ((address >> 1) & 0x0f)] = (UINT8)value;
		}
	}
}

