248 lines
5.1 KiB
C
248 lines
5.1 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) 2004-2009 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 "x7.h"
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byte x7_z80_in(TilemCalc* calc, dword port)
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{
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/* FIXME: measure actual levels */
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static const byte battlevel[4] = { 33, 39, 36, 43 };
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byte v;
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/* FIXME: confirm that mirror ports are the same as on 83+
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- and figure out what, if anything, port 5 does */
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switch(port&0x1f) {
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case 0x00:
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case 0x08:
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v = tilem_linkport_get_lines(calc);
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v |= (calc->linkport.lines << 4);
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return(v);
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case 0x01:
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case 0x09:
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return(tilem_keypad_read_keys(calc));
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case 0x02:
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case 0x0A:
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v = battlevel[calc->hwregs[PORT4] >> 6];
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return(calc->battery >= v ? 0x05 : 0x04);
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case 0x03:
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case 0x0B:
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return(calc->hwregs[PORT3]);
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case 0x04:
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case 0x0C:
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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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if (calc->z80.interrupts & TILEM_INTERRUPT_TIMER2)
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v |= 0x04;
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if (calc->z80.interrupts & TILEM_INTERRUPT_LINK_ACTIVE)
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v |= 0x10;
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return(v);
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case 0x06:
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case 0x0E:
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return(calc->hwregs[PORT6]);
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case 0x07:
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case 0x0F:
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return(calc->hwregs[PORT7]);
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case 0x10:
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case 0x12:
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case 0x18:
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case 0x1A:
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return(tilem_lcd_t6a04_status(calc));
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case 0x11:
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case 0x13:
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case 0x19:
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case 0x1B:
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return(tilem_lcd_t6a04_read(calc));
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}
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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[PORT6] & 0x40)
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pageA = (0x20 | (calc->hwregs[PORT6] & 1));
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else
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pageA = (calc->hwregs[PORT6] & 0x1f);
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if (calc->hwregs[PORT7] & 0x40)
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pageB = (0x20 | (calc->hwregs[PORT7] & 1));
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else
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pageB = (calc->hwregs[PORT7] & 0x1f);
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if (calc->hwregs[PORT4] & 1) {
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/* FIXME: confirm this behavior (83+-like rather than
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83-like) */
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calc->mempagemap[1] = (pageA & ~1);
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calc->mempagemap[2] = pageA;
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calc->mempagemap[3] = pageB;
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}
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else {
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calc->mempagemap[1] = pageA;
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calc->mempagemap[2] = pageB;
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calc->mempagemap[3] = 0x20;
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}
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}
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void x7_z80_out(TilemCalc* calc, dword port, byte value)
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{
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static const int tmrvalues[4] = { 1786, 4032, 5882, 8474 };
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int t;
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unsigned int mode;
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switch(port&0x1f) {
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case 0x00:
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case 0x08:
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tilem_linkport_set_lines(calc, value);
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break;
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case 0x01:
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case 0x09:
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tilem_keypad_set_group(calc, value);
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break;
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case 0x03:
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case 0x0B:
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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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if (!(value & 0x04))
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calc->z80.interrupts &= ~TILEM_INTERRUPT_TIMER2;
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mode = calc->linkport.mode;
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if (value & 0x10)
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mode |= TILEM_LINK_MODE_INT_ON_ACTIVE;
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else
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mode &= ~TILEM_LINK_MODE_INT_ON_ACTIVE;
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tilem_linkport_set_mode(calc, mode);
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calc->poweronhalt = ((value & 8) >> 3);
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calc->hwregs[PORT3] = value;
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break;
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case 0x04:
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case 0x0C:
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calc->hwregs[PORT4] = value;
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t = tmrvalues[(value & 6) >> 1];
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tilem_z80_set_timer_period(calc, TIMER_INT1, t);
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tilem_z80_set_timer_period(calc, TIMER_INT2A, t);
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tilem_z80_set_timer_period(calc, TIMER_INT2B, t);
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setup_mapping(calc);
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break;
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case 0x06:
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case 0x0E:
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calc->hwregs[PORT6] = value & 0x7f;
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setup_mapping(calc);
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break;
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case 0x07:
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case 0x0F:
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calc->hwregs[PORT7] = value & 0x7f;
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setup_mapping(calc);
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break;
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case 0x10:
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case 0x12:
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case 0x18:
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case 0x1A:
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tilem_lcd_t6a04_control(calc, value);
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break;
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case 0x11:
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case 0x13:
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case 0x19:
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case 0x1B:
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tilem_lcd_t6a04_write(calc, value);
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break;
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case 0x14:
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case 0x15:
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if (calc->hwregs[PROTECTSTATE] == 7) {
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if (value & 1)
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tilem_message(calc, "Flash unlocked");
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else
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tilem_message(calc, "Flash locked");
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calc->flash.unlock = value&1;
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}
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break;
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case 0x16:
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case 0x17:
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if (calc->flash.unlock && calc->hwregs[PROTECTSTATE] == 7) {
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tilem_message(calc, "No-exec mask set to %x", value);
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calc->hwregs[NOEXEC] = ((value & 0x0f) << 2);
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}
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break;
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}
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return;
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}
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void x7_z80_ptimer(TilemCalc* calc, int id)
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{
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switch (id) {
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case TIMER_INT1:
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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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case TIMER_INT2A:
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case TIMER_INT2B:
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if (calc->hwregs[PORT3] & 0x04)
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calc->z80.interrupts |= TILEM_INTERRUPT_TIMER2;
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break;
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}
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}
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