184 lines
3.5 KiB
C
184 lines
3.5 KiB
C
/*
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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) 2004-2011 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 "x6.h"
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byte x6_z80_in(TilemCalc* calc, dword port)
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{
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byte v, b;
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switch(port&0xff) {
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case 0x01:
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return(tilem_keypad_read_keys(calc));
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case 0x03:
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v = (calc->keypad.onkeydown ? 0x00 : 0x08);
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if (calc->z80.interrupts & TILEM_INTERRUPT_ON_KEY)
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v |= 0x01;
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if (calc->z80.interrupts & TILEM_INTERRUPT_TIMER1)
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v |= 0x02;
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return(v);
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case 0x04:
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return(0x01);
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case 0x05:
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return(calc->hwregs[PORT5]);
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case 0x06:
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return(calc->hwregs[PORT6]);
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case 0x07:
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v = tilem_linkport_get_lines(calc);
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b = (calc->hwregs[PORT7] >> 4) | 0xf0;
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return (calc->hwregs[PORT7] & b) | (v & ~b);
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}
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tilem_warning(calc, "Input from port %x", port);
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return(0x00);
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}
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static void setup_mapping(TilemCalc* calc)
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{
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unsigned int pageA, pageB;
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if (calc->hwregs[PORT5] & 0x40) {
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pageA = (0x10 | (calc->hwregs[PORT5] & 7));
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}
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else {
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pageA = (calc->hwregs[PORT5] & 0x0f);
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}
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if (calc->hwregs[PORT6] & 0x40) {
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pageB = (0x10 | (calc->hwregs[PORT6] & 7));
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}
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else {
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pageB = (calc->hwregs[PORT6] & 0x0f);
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}
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calc->mempagemap[1] = pageA;
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calc->mempagemap[2] = pageB;
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calc->mempagemap[3] = 0x10;
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}
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void x6_z80_out(TilemCalc* calc, dword port, byte value)
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{
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switch(port&0xff) {
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case 0x00:
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calc->lcd.addr = ((value & 0x3f) << 8);
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calc->z80.lastlcdwrite = calc->z80.clock;
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break;
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case 0x01:
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tilem_keypad_set_group(calc, value);
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break;
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case 0x02:
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/* contrast */
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calc->lcd.contrast = 16 + (value & 0x1f);
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break;
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case 0x03:
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/* Lcd Power */
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if (value & 0x01) {
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calc->keypad.onkeyint = 1;
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}
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else {
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calc->z80.interrupts &= ~TILEM_INTERRUPT_ON_KEY;
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calc->keypad.onkeyint = 0;
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}
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if (!(value & 0x02)) {
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calc->z80.interrupts &= ~TILEM_INTERRUPT_TIMER1;
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}
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calc->hwregs[PORT3] = value;
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calc->lcd.active = calc->poweronhalt = ((value & 8) >> 3);
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break;
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case 0x04:
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/* LCD control */
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calc->hwregs[PORT4] = value;
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switch (value & 0x18) {
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case 0x00:
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calc->lcd.rowstride = 10;
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break;
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case 0x08:
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calc->lcd.rowstride = 12;
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break;
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case 0x10:
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calc->lcd.rowstride = 16;
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break;
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case 0x18:
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calc->lcd.rowstride = 20;
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break;
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}
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calc->z80.lastlcdwrite = calc->z80.clock;
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break;
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case 0x05:
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calc->hwregs[PORT5] = value;
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setup_mapping(calc);
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break;
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case 0x06:
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calc->hwregs[PORT6] = value;
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setup_mapping(calc);
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break;
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case 0x07:
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/* Link */
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calc->hwregs[PORT7] = value;
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value = (((value >> 6) & (value >> 2))
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| ((value >> 4) & ~value));
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tilem_linkport_set_lines(calc, value);
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break;
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}
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return;
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}
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void x6_z80_ptimer(TilemCalc* calc, int id)
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{
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switch (id) {
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case TIMER_INT:
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if (calc->hwregs[PORT3] & 0x02)
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calc->z80.interrupts |= TILEM_INTERRUPT_TIMER1;
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break;
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}
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}
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