65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
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/*
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* libtilemcore - Graphing calculator emulation library
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*
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* Copyright (C) 2001 Solignac Julien
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* Copyright (C) 2004-2009 Benjamin Moody
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <tilem.h>
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#include "x3.h"
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void x3_z80_wrmem(TilemCalc* calc, dword A, byte v)
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{
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dword pa = 0x4000 * calc->mempagemap[(A)>>14] + (A & 0x3FFF);
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if (pa >= 0x40000) {
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*(calc->mem + pa) = v;
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}
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}
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byte x3_z80_rdmem(TilemCalc* calc, dword A)
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{
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dword pa = 0x4000 * calc->mempagemap[(A)>>14] + (A & 0x3FFF);
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return (*(calc->mem + pa));
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}
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dword x3_mem_ltop(TilemCalc* calc, dword A)
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{
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byte page = calc->mempagemap[A >> 14];
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return ((page << 14) | (A & 0x3fff));
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}
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dword x3_mem_ptol(TilemCalc* calc, dword A)
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{
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byte page = A >> 14;
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int i;
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for (i = 0; i < 4; i++) {
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if (calc->mempagemap[i] == page) {
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return ((i << 14) | (A & 0x3fff));
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}
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}
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return (0xffffffff);
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}
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