882 lines
17 KiB
C
882 lines
17 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) 2004-2011 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 <time.h>
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#include <tilem.h>
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#include "xn.h"
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static void set_lcd_wait_timer(TilemCalc* calc)
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{
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static const int delaytime[8] = { 48, 112, 176, 240,
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304, 368, 432, 496 };
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int i;
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switch (calc->hwregs[PORT20] & 3) {
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case 0:
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return;
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case 1:
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i = (calc->hwregs[PORT2F] & 3);
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break;
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case 2:
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i = ((calc->hwregs[PORT2F] >> 2) & 7);
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break;
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default:
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i = ((calc->hwregs[PORT2F] >> 5) & 7);
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break;
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}
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tilem_z80_set_timer(calc, TIMER_LCD_WAIT, delaytime[i], 0, 0);
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calc->hwregs[LCD_WAIT] = 1;
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}
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byte xn_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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unsigned int f;
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time_t curtime;
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switch(port&0xff) {
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case 0x00:
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if (tilem_z80_timer_running(calc, TIMER_FREEZE_LINK_PORT))
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return(3);
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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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return(tilem_keypad_read_keys(calc));
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case 0x02:
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v = battlevel[calc->hwregs[PORT4] >> 6];
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return ((calc->battery >= v ? 0xe1 : 0xe0)
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| (calc->hwregs[LCD_WAIT] ? 0 : 2)
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| (calc->flash.unlock << 2));
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case 0x03:
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return(calc->hwregs[PORT3]);
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case 0x04:
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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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if (calc->usertimers[0].status & TILEM_USER_TIMER_FINISHED)
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v |= 0x20;
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if (calc->usertimers[1].status & TILEM_USER_TIMER_FINISHED)
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v |= 0x40;
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if (calc->usertimers[2].status & TILEM_USER_TIMER_FINISHED)
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v |= 0x80;
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return(v);
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case 0x05:
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return(calc->hwregs[PORT5] & 0x0f);
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case 0x06:
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return(calc->hwregs[PORT6]);
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case 0x07:
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return(calc->hwregs[PORT7]);
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case 0x08:
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return(calc->hwregs[PORT8]);
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case 0x09:
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f = tilem_linkport_get_assist_flags(calc);
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if (f & (TILEM_LINK_ASSIST_READ_BUSY
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| TILEM_LINK_ASSIST_WRITE_BUSY))
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v = 0x00;
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else
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v = 0x20;
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if (calc->z80.interrupts & TILEM_INTERRUPT_LINK_READ)
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v |= 0x01;
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if (calc->z80.interrupts & TILEM_INTERRUPT_LINK_IDLE)
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v |= 0x02;
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if (calc->z80.interrupts & TILEM_INTERRUPT_LINK_ERROR)
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v |= 0x04;
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if (f & TILEM_LINK_ASSIST_READ_BUSY)
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v |= 0x08;
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if (f & TILEM_LINK_ASSIST_READ_BYTE)
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v |= 0x10;
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if (f & (TILEM_LINK_ASSIST_READ_ERROR
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| TILEM_LINK_ASSIST_WRITE_ERROR))
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v |= 0x40;
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if (f & TILEM_LINK_ASSIST_WRITE_BUSY)
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v |= 0x80;
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calc->z80.interrupts &= ~TILEM_INTERRUPT_LINK_ERROR;
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return(v);
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case 0x0A:
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v = calc->linkport.assistlastbyte;
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tilem_linkport_read_byte(calc);
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return(v);
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case 0x0E:
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return(calc->hwregs[PORTE] & 3);
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case 0x0F:
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return(calc->hwregs[PORTF] & 3);
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case 0x10:
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case 0x12:
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calc->z80.clock += calc->hwregs[LCD_PORT_DELAY];
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set_lcd_wait_timer(calc);
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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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calc->z80.clock += calc->hwregs[LCD_PORT_DELAY];
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set_lcd_wait_timer(calc);
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return(tilem_lcd_t6a04_read(calc));
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case 0x15:
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return(0x45); /* ??? */
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case 0x1C:
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return(tilem_md5_assist_get_value(calc));
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case 0x1D:
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return(tilem_md5_assist_get_value(calc) >> 8);
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case 0x1E:
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return(tilem_md5_assist_get_value(calc) >> 16);
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case 0x1F:
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return(tilem_md5_assist_get_value(calc) >> 24);
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case 0x20:
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return(calc->hwregs[PORT20] & 3);
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case 0x21:
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return(calc->hwregs[PORT21] & 0x33);
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case 0x22:
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return(calc->hwregs[PORT22]);
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case 0x23:
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return(calc->hwregs[PORT23]);
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case 0x25:
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return(calc->hwregs[PORT25]);
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case 0x26:
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return(calc->hwregs[PORT26]);
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case 0x27:
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return(calc->hwregs[PORT27]);
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case 0x28:
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return(calc->hwregs[PORT28]);
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case 0x29:
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return(calc->hwregs[PORT29]);
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case 0x2A:
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return(calc->hwregs[PORT2A]);
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case 0x2B:
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return(calc->hwregs[PORT2B]);
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case 0x2C:
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return(calc->hwregs[PORT2C]);
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case 0x2D:
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return(calc->hwregs[PORT2D] & 3);
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case 0x2E:
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return(calc->hwregs[PORT2E]);
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case 0x2F:
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return(calc->hwregs[PORT2F]);
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case 0x30:
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return(calc->usertimers[0].frequency);
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case 0x31:
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return(calc->usertimers[0].status);
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case 0x32:
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return(tilem_user_timer_get_value(calc, 0));
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case 0x33:
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return(calc->usertimers[1].frequency);
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case 0x34:
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return(calc->usertimers[1].status);
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case 0x35:
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return(tilem_user_timer_get_value(calc, 1));
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case 0x36:
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return(calc->usertimers[2].frequency);
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case 0x37:
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return(calc->usertimers[2].status);
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case 0x38:
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return(tilem_user_timer_get_value(calc, 2));
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case 0x39:
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return(0xf0); /* ??? */
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case 0x40:
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return calc->hwregs[CLOCK_MODE];
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case 0x41:
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return calc->hwregs[CLOCK_INPUT]&0xff;
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case 0x42:
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return (calc->hwregs[CLOCK_INPUT]>>8)&0xff;
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case 0x43:
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return (calc->hwregs[CLOCK_INPUT]>>16)&0xff;
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case 0x44:
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return (calc->hwregs[CLOCK_INPUT]>>24)&0xff;
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case 0x45:
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case 0x46:
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case 0x47:
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case 0x48:
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if (calc->hwregs[CLOCK_MODE] & 1) {
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time(&curtime);
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}
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else {
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curtime = 0;
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}
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curtime += calc->hwregs[CLOCK_DIFF];
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return (curtime >> ((port - 0x45) * 8));
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case 0x4C:
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return(0x22);
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case 0x4D:
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/* USB port - not emulated, calculator should
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recognize that the USB cable is
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disconnected.
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Thanks go to Dan Englender for these
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values. */
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return(0xA5);
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case 0x55:
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return(0x1F);
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case 0x56:
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return(0x00);
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case 0x57:
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return(0x50);
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case 0x0B:
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case 0x0C:
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case 0x0D:
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case 0x14:
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case 0x16:
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case 0x17:
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case 0x18:
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case 0x19:
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case 0x1A:
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case 0x1B:
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return(0);
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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, pageC;
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if (calc->hwregs[PORT6] & 0x80)
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pageA = (0x80 | (calc->hwregs[PORT6] & 7));
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else
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pageA = (calc->hwregs[PORT6] & 0x7f);
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if (calc->hwregs[PORT7] & 0x80)
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pageB = (0x80 | (calc->hwregs[PORT7] & 7));
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else
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pageB = (calc->hwregs[PORT7] & 0x7f);
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pageC = (0x80 | (calc->hwregs[PORT5] & 7));
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if (calc->hwregs[PORT4] & 1) {
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calc->mempagemap[1] = (pageA & ~1);
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calc->mempagemap[2] = (pageA | 1);
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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] = pageC;
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}
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}
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static void setup_clockdelays(TilemCalc* calc)
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{
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byte lcdport = calc->hwregs[PORT29 + (calc->hwregs[PORT20] & 3)];
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byte memport = calc->hwregs[PORT2E];
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if (!(lcdport & 1))
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memport &= ~0x07;
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if (!(lcdport & 2))
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memport &= ~0x70;
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calc->hwregs[FLASH_EXEC_DELAY] = (memport & 1);
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calc->hwregs[FLASH_READ_DELAY] = ((memport >> 1) & 1);
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calc->hwregs[FLASH_WRITE_DELAY] = ((memport >> 2) & 1);
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calc->hwregs[RAM_EXEC_DELAY] = ((memport >> 4) & 1);
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calc->hwregs[RAM_READ_DELAY] = ((memport >> 5) & 1);
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calc->hwregs[RAM_WRITE_DELAY] = ((memport >> 6) & 1);
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calc->hwregs[LCD_PORT_DELAY] = (lcdport >> 2);
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}
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void xn_z80_out(TilemCalc* calc, dword port, byte value)
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{
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static const int tmrvalues[4] = { 1953, 4395, 6836, 9277 };
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int t, r;
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unsigned int mode;
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time_t curtime;
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switch(port&0xff) {
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case 0x00:
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if (value == 0
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&& calc->linkport.lines != 0
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&& calc->linkport.extlines == 0) {
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/* Kludge to work around TI's broken
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RecAByteIO implementation on 2.46+, which
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will fail if the sending device is too
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|
|
fast. */
|
||
|
|
tilem_z80_set_timer(calc, TIMER_FREEZE_LINK_PORT,
|
||
|
|
100, 0, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
tilem_linkport_set_lines(calc, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x01:
|
||
|
|
tilem_keypad_set_group(calc, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x03:
|
||
|
|
if (value & 0x01) {
|
||
|
|
calc->keypad.onkeyint = 1;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
calc->z80.interrupts &= ~TILEM_INTERRUPT_ON_KEY;
|
||
|
|
calc->keypad.onkeyint = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(value & 0x02))
|
||
|
|
calc->z80.interrupts &= ~TILEM_INTERRUPT_TIMER1;
|
||
|
|
|
||
|
|
if (!(value & 0x04))
|
||
|
|
calc->z80.interrupts &= ~TILEM_INTERRUPT_TIMER2;
|
||
|
|
|
||
|
|
if (value & 0x06) {
|
||
|
|
calc->usertimers[0].status &= ~TILEM_USER_TIMER_NO_HALT_INT;
|
||
|
|
calc->usertimers[1].status &= ~TILEM_USER_TIMER_NO_HALT_INT;
|
||
|
|
calc->usertimers[2].status &= ~TILEM_USER_TIMER_NO_HALT_INT;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
calc->usertimers[0].status |= TILEM_USER_TIMER_NO_HALT_INT;
|
||
|
|
calc->usertimers[1].status |= TILEM_USER_TIMER_NO_HALT_INT;
|
||
|
|
calc->usertimers[2].status |= TILEM_USER_TIMER_NO_HALT_INT;
|
||
|
|
}
|
||
|
|
|
||
|
|
mode = calc->linkport.mode;
|
||
|
|
if (value & 0x10)
|
||
|
|
mode |= TILEM_LINK_MODE_INT_ON_ACTIVE;
|
||
|
|
else
|
||
|
|
mode &= ~TILEM_LINK_MODE_INT_ON_ACTIVE;
|
||
|
|
|
||
|
|
tilem_linkport_set_mode(calc, mode);
|
||
|
|
|
||
|
|
calc->poweronhalt = ((value & 8) >> 3);
|
||
|
|
calc->hwregs[PORT3] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
|
||
|
|
case 0x04:
|
||
|
|
calc->hwregs[PORT4] = value;
|
||
|
|
|
||
|
|
t = tmrvalues[(value & 6) >> 1];
|
||
|
|
tilem_z80_set_timer_period(calc, TIMER_INT1, t);
|
||
|
|
tilem_z80_set_timer_period(calc, TIMER_INT2A, t);
|
||
|
|
tilem_z80_set_timer_period(calc, TIMER_INT2B, t);
|
||
|
|
|
||
|
|
setup_mapping(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x05:
|
||
|
|
calc->hwregs[PORT5] = value & 0x0f;
|
||
|
|
setup_mapping(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x06:
|
||
|
|
calc->hwregs[PORT6] = value;
|
||
|
|
setup_mapping(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x07:
|
||
|
|
calc->hwregs[PORT7] = value;
|
||
|
|
setup_mapping(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x08:
|
||
|
|
calc->hwregs[PORT8] = value;
|
||
|
|
|
||
|
|
mode = calc->linkport.mode;
|
||
|
|
|
||
|
|
if (value & 0x01)
|
||
|
|
mode |= TILEM_LINK_MODE_INT_ON_READ;
|
||
|
|
else
|
||
|
|
mode &= ~TILEM_LINK_MODE_INT_ON_READ;
|
||
|
|
|
||
|
|
if (value & 0x02)
|
||
|
|
mode |= TILEM_LINK_MODE_INT_ON_IDLE;
|
||
|
|
else
|
||
|
|
mode &= ~TILEM_LINK_MODE_INT_ON_IDLE;
|
||
|
|
|
||
|
|
if (value & 0x04)
|
||
|
|
mode |= TILEM_LINK_MODE_INT_ON_ERROR;
|
||
|
|
else
|
||
|
|
mode &= ~TILEM_LINK_MODE_INT_ON_ERROR;
|
||
|
|
|
||
|
|
if (value & 0x80)
|
||
|
|
mode &= ~TILEM_LINK_MODE_ASSIST;
|
||
|
|
else
|
||
|
|
mode |= TILEM_LINK_MODE_ASSIST;
|
||
|
|
|
||
|
|
tilem_linkport_set_mode(calc, mode);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x09:
|
||
|
|
calc->hwregs[PORT9] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x0A:
|
||
|
|
calc->hwregs[PORTA] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x0B:
|
||
|
|
calc->hwregs[PORTB] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x0C:
|
||
|
|
calc->hwregs[PORTC] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
|
||
|
|
case 0x0D:
|
||
|
|
if (!(calc->hwregs[PORT8] & 0x80))
|
||
|
|
tilem_linkport_write_byte(calc, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x0E:
|
||
|
|
calc->hwregs[PORTE] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x0F:
|
||
|
|
calc->hwregs[PORTF] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x10:
|
||
|
|
case 0x12:
|
||
|
|
calc->z80.clock += calc->hwregs[LCD_PORT_DELAY];
|
||
|
|
set_lcd_wait_timer(calc);
|
||
|
|
tilem_lcd_t6a04_control(calc, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x11:
|
||
|
|
case 0x13:
|
||
|
|
calc->z80.clock += calc->hwregs[LCD_PORT_DELAY];
|
||
|
|
set_lcd_wait_timer(calc);
|
||
|
|
tilem_lcd_t6a04_write(calc, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x14:
|
||
|
|
if (calc->hwregs[PROTECTSTATE] == 7) {
|
||
|
|
/*
|
||
|
|
if (value & 1)
|
||
|
|
tilem_message(calc, "Flash unlocked");
|
||
|
|
else
|
||
|
|
tilem_message(calc, "Flash locked");
|
||
|
|
*/
|
||
|
|
calc->flash.unlock = value&1;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x18:
|
||
|
|
case 0x19:
|
||
|
|
case 0x1A:
|
||
|
|
case 0x1B:
|
||
|
|
case 0x1C:
|
||
|
|
case 0x1D:
|
||
|
|
r = (port & 0xff) - 0x18;
|
||
|
|
calc->md5assist.regs[r] >>= 8;
|
||
|
|
calc->md5assist.regs[r] |= (value << 24);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1E:
|
||
|
|
calc->md5assist.shift = value & 0x1f;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1F:
|
||
|
|
calc->md5assist.mode = value & 3;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x20:
|
||
|
|
calc->hwregs[PORT20] = value;
|
||
|
|
|
||
|
|
if (value & 3) {
|
||
|
|
tilem_z80_set_speed(calc, 15000);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
tilem_z80_set_speed(calc, 6000);
|
||
|
|
}
|
||
|
|
|
||
|
|
setup_clockdelays(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x21:
|
||
|
|
if (calc->flash.unlock && calc->hwregs[PROTECTSTATE] == 7) {
|
||
|
|
calc->hwregs[PORT21] = value;
|
||
|
|
|
||
|
|
/* FIXME: these restrictions were tested on
|
||
|
|
83+ SE; someone should confirm them for
|
||
|
|
84+ */
|
||
|
|
switch (value & 0x30) {
|
||
|
|
case 0x00:
|
||
|
|
/* restrict pp. 0, 2, 4, 6, 8, A, C, E */
|
||
|
|
calc->hwregs[NO_EXEC_RAM] = 0x5555;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x10:
|
||
|
|
/* restrict pp. 0, 3, 4, 7, 8, B, C, F */
|
||
|
|
calc->hwregs[NO_EXEC_RAM] = 0x9999;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x20:
|
||
|
|
/* restrict pp. 0, 3-7, 8, B-F */
|
||
|
|
calc->hwregs[NO_EXEC_RAM] = 0xF9F9;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x30:
|
||
|
|
/* restrict pp. 0, 3-F */
|
||
|
|
calc->hwregs[NO_EXEC_RAM] = 0xFFF9;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x22:
|
||
|
|
if (calc->flash.unlock && calc->hwregs[PROTECTSTATE] == 7) {
|
||
|
|
calc->hwregs[PORT22] = value;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x23:
|
||
|
|
if (calc->flash.unlock && calc->hwregs[PROTECTSTATE] == 7) {
|
||
|
|
calc->hwregs[PORT23] = value;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x25:
|
||
|
|
if (calc->flash.unlock && calc->hwregs[PROTECTSTATE] == 7) {
|
||
|
|
calc->hwregs[PORT25] = value;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x26:
|
||
|
|
if (calc->flash.unlock && calc->hwregs[PROTECTSTATE] == 7) {
|
||
|
|
calc->hwregs[PORT26] = value;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x27:
|
||
|
|
calc->hwregs[PORT27] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x28:
|
||
|
|
calc->hwregs[PORT28] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x29:
|
||
|
|
calc->hwregs[PORT29] = value;
|
||
|
|
setup_clockdelays(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x2A:
|
||
|
|
calc->hwregs[PORT2A] = value;
|
||
|
|
setup_clockdelays(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x2B:
|
||
|
|
calc->hwregs[PORT2B] = value;
|
||
|
|
setup_clockdelays(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x2C:
|
||
|
|
calc->hwregs[PORT2C] = value;
|
||
|
|
setup_clockdelays(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x2D:
|
||
|
|
calc->hwregs[PORT2D] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x2E:
|
||
|
|
calc->hwregs[PORT2E] = value;
|
||
|
|
setup_clockdelays(calc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x2F:
|
||
|
|
calc->hwregs[PORT2F] = value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x30:
|
||
|
|
tilem_user_timer_set_frequency(calc, 0, value);
|
||
|
|
break;
|
||
|
|
case 0x31:
|
||
|
|
tilem_user_timer_set_mode(calc, 0, value);
|
||
|
|
break;
|
||
|
|
case 0x32:
|
||
|
|
tilem_user_timer_start(calc, 0, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x33:
|
||
|
|
tilem_user_timer_set_frequency(calc, 1, value);
|
||
|
|
break;
|
||
|
|
case 0x34:
|
||
|
|
tilem_user_timer_set_mode(calc, 1, value);
|
||
|
|
break;
|
||
|
|
case 0x35:
|
||
|
|
tilem_user_timer_start(calc, 1, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x36:
|
||
|
|
tilem_user_timer_set_frequency(calc, 2, value);
|
||
|
|
break;
|
||
|
|
case 0x37:
|
||
|
|
tilem_user_timer_set_mode(calc, 2, value);
|
||
|
|
break;
|
||
|
|
case 0x38:
|
||
|
|
tilem_user_timer_start(calc, 2, value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x40:
|
||
|
|
time(&curtime);
|
||
|
|
|
||
|
|
if ((calc->hwregs[CLOCK_MODE] & 1) != (value & 1)) {
|
||
|
|
if (value & 1)
|
||
|
|
calc->hwregs[CLOCK_DIFF] -= curtime;
|
||
|
|
else
|
||
|
|
calc->hwregs[CLOCK_DIFF] += curtime;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(calc->hwregs[CLOCK_MODE] & 2) && (value & 2)) {
|
||
|
|
calc->hwregs[CLOCK_DIFF] = calc->hwregs[CLOCK_INPUT];
|
||
|
|
if (value & 1)
|
||
|
|
calc->hwregs[CLOCK_DIFF] -= curtime;
|
||
|
|
}
|
||
|
|
calc->hwregs[CLOCK_MODE] = value & 3;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x41:
|
||
|
|
calc->hwregs[CLOCK_INPUT] &= 0xffffff00;
|
||
|
|
calc->hwregs[CLOCK_INPUT] |= value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x42:
|
||
|
|
calc->hwregs[CLOCK_INPUT] &= 0xffff00ff;
|
||
|
|
calc->hwregs[CLOCK_INPUT] |= (value << 8);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x43:
|
||
|
|
calc->hwregs[CLOCK_INPUT] &= 0xff00ffff;
|
||
|
|
calc->hwregs[CLOCK_INPUT] |= (value << 16);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x44:
|
||
|
|
calc->hwregs[CLOCK_INPUT] &= 0x00ffffff;
|
||
|
|
calc->hwregs[CLOCK_INPUT] |= (value << 24);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
void xn_z80_instr(TilemCalc* calc, dword opcode)
|
||
|
|
{
|
||
|
|
dword pa;
|
||
|
|
byte l, h;
|
||
|
|
|
||
|
|
switch (opcode) {
|
||
|
|
case 0xeded:
|
||
|
|
/* emulator control instruction */
|
||
|
|
l = xn_z80_rdmem(calc, calc->z80.r.pc.d);
|
||
|
|
h = xn_z80_rdmem(calc, calc->z80.r.pc.d + 1);
|
||
|
|
|
||
|
|
calc->z80.r.pc.d += 2;
|
||
|
|
|
||
|
|
opcode = (l | (h << 8));
|
||
|
|
switch (opcode) {
|
||
|
|
case 0x1000: /* Power off */
|
||
|
|
case 0x1001: /* Power on */
|
||
|
|
case 0x1002: /* Prepare for power off */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1003:
|
||
|
|
/* Disable Nspire keypad */
|
||
|
|
tilem_message(calc, "Keypad locked");
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1004:
|
||
|
|
/* Enable Nspire keypad */
|
||
|
|
tilem_message(calc, "Keypad unlocked");
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1005:
|
||
|
|
/* ??? */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1008:
|
||
|
|
/* check if USB data waiting (?) */
|
||
|
|
calc->z80.r.af.d |= 0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x100C:
|
||
|
|
/* ??? */
|
||
|
|
calc->z80.r.af.d &= ~0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x100D:
|
||
|
|
/* check if USB link should be used (???) */
|
||
|
|
calc->z80.r.af.d &= ~0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x100E:
|
||
|
|
case 0x100F:
|
||
|
|
/* ??? */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x101C:
|
||
|
|
/* disable USB device (???) */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1020:
|
||
|
|
/* check for something USB-related */
|
||
|
|
calc->z80.r.af.d |= 0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1024:
|
||
|
|
/* check if USB data waiting */
|
||
|
|
calc->z80.r.af.d |= 0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1029:
|
||
|
|
/* check for something USB-related */
|
||
|
|
calc->z80.r.af.d |= 0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x1027:
|
||
|
|
/* check for something USB-related */
|
||
|
|
calc->z80.r.af.d |= 0x40;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x102E:
|
||
|
|
/* ??? */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0x102F:
|
||
|
|
/* ??? */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
tilem_warning(calc, "Unknown control instruction %x",
|
||
|
|
opcode);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0xedee:
|
||
|
|
/* erase Flash at address HL */
|
||
|
|
if (calc->flash.unlock) {
|
||
|
|
pa = xn_mem_ltop(calc, calc->z80.r.hl.w.l);
|
||
|
|
if (pa < 0x200000) {
|
||
|
|
tilem_flash_erase_address(calc, pa);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 0xedef:
|
||
|
|
/* enable Flash writing for following instruction */
|
||
|
|
if (calc->flash.unlock) {
|
||
|
|
calc->flash.state = 3;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
tilem_warning(calc, "Invalid opcode %x", opcode);
|
||
|
|
tilem_z80_exception(calc, TILEM_EXC_INSTRUCTION);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void xn_z80_ptimer(TilemCalc* calc, int id)
|
||
|
|
{
|
||
|
|
switch (id) {
|
||
|
|
case TIMER_INT1:
|
||
|
|
if (calc->hwregs[PORT3] & 0x02)
|
||
|
|
calc->z80.interrupts |= TILEM_INTERRUPT_TIMER1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case TIMER_INT2A:
|
||
|
|
case TIMER_INT2B:
|
||
|
|
if (calc->hwregs[PORT3] & 0x04)
|
||
|
|
calc->z80.interrupts |= TILEM_INTERRUPT_TIMER2;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case TIMER_LCD_WAIT:
|
||
|
|
calc->hwregs[LCD_WAIT] = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|