/* * userport_rtc_58321a.c - Generic userport RTC (58321a) emulation. * * Written by * Marco van den Heuvel * * This file is part of VICE, the Versatile Commodore Emulator. * See README for copyright notice. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA. * */ /* Userport RTC 58321a (C64/C128/CBM2/PET/VIC20) C64/C128 | CBM2 | PET | VIC20 | NAME ------------------------------------ C | 14 | C | C | PB0 <-> D0 D | 13 | D | D | PB1 <-> D1 E | 12 | E | E | PB2 <-> D2 F | 11 | F | F | PB3 <-> D3 H | 10 | H | H | PB4 -> ADDRESS /DATA J | 9 | J | J | PB5 -> READ K | 8 | K | K | PB6 -> WRITE */ #include "vice.h" #include #include #include #include "cmdline.h" #include "lib.h" #include "maincpu.h" #include "resources.h" #include "rtc-58321a.h" #include "snapshot.h" #include "uiapi.h" #include "joyport.h" #include "userport.h" #include "userport_rtc_58321a.h" int userport_rtc_58321a_enabled = 0; /* rtc context */ static rtc_58321a_t *rtc58321a_context = NULL; /* rtc save */ static int rtc58321a_rtc_save; static int read_line_active = 0; /* ------------------------------------------------------------------------- */ /* Some prototypes are needed */ static uint8_t userport_rtc_read_pbx(uint8_t orig); static void userport_rtc_store_pbx(uint8_t value, int pulse); static int userport_rtc_write_snapshot_module(snapshot_t *s); static int userport_rtc_read_snapshot_module(snapshot_t *s); static int userport_rtc_enable(int value); static userport_device_t rtc_device = { "Userport RTC (RTC58321A)", /* device name */ JOYSTICK_ADAPTER_ID_NONE, /* NOT a joystick adapter */ USERPORT_DEVICE_TYPE_RTC, /* device is an RTC */ userport_rtc_enable, /* enable function */ userport_rtc_read_pbx, /* read pb0-pb7 function */ userport_rtc_store_pbx, /* store pb0-pb7 function */ NULL, /* NO read pa2 pin function */ NULL, /* NO store pa2 pin function */ NULL, /* NO read pa3 pin function */ NULL, /* NO store pa3 pin function */ 0, /* pc pin is NOT needed */ NULL, /* NO store sp1 pin function */ NULL, /* NO read sp1 pin function */ NULL, /* NO store sp2 pin function */ NULL, /* NO read sp2 pin function */ NULL, /* NO reset function */ NULL, /* NO powerup function */ userport_rtc_write_snapshot_module, /* snapshot write function */ userport_rtc_read_snapshot_module /* snapshot read function */ }; /* ------------------------------------------------------------------------- */ static int userport_rtc_enable(int value) { int val = value ? 1 : 0; if (userport_rtc_58321a_enabled == val) { return 0; } if (val) { rtc58321a_context = rtc58321a_init("USER"); } else { if (rtc58321a_context) { rtc58321a_destroy(rtc58321a_context, rtc58321a_rtc_save); rtc58321a_context = NULL; } } userport_rtc_58321a_enabled = val; return 0; } static int set_userport_rtc_save(int val, void *param) { rtc58321a_rtc_save = val ? 1 : 0; return 0; } static const resource_int_t resources_int[] = { { "UserportRTC58321aSave", 0, RES_EVENT_STRICT, (resource_value_t)0, &rtc58321a_rtc_save, set_userport_rtc_save, NULL }, RESOURCE_INT_LIST_END }; int userport_rtc_58321a_resources_init(void) { if (userport_device_register(USERPORT_DEVICE_RTC_58321A, &rtc_device) < 0) { return -1; } return resources_register_int(resources_int); } static const cmdline_option_t cmdline_options[] = { { "-userportrtc58321asave", SET_RESOURCE, CMDLINE_ATTRIB_NONE, NULL, NULL, "UserportRTC58321aSave", (resource_value_t)1, NULL, "Enable saving of the Userport RTC (58321a) data when changed." }, { "+userportrtc58321asave", SET_RESOURCE, CMDLINE_ATTRIB_NONE, NULL, NULL, "UserportRTC58321aSave", (resource_value_t)0, NULL, "Disable saving of the Userport RTC (58321a) data when changed." }, CMDLINE_LIST_END }; int userport_rtc_58321a_cmdline_options_init(void) { return cmdline_register_options(cmdline_options); } void userport_rtc_58321a_resources_shutdown(void) { if (rtc58321a_context) { rtc58321a_destroy(rtc58321a_context, rtc58321a_rtc_save); rtc58321a_context = NULL; } } /* ---------------------------------------------------------------------*/ static void userport_rtc_store_pbx(uint8_t value, int pulse) { if (value & 0x10) { rtc58321a_write_address(rtc58321a_context, (uint8_t)(value & 0xf)); } if (value & 0x20) { read_line_active = 1; } else { read_line_active = 0; } if (value & 0x40) { rtc58321a_write_data(rtc58321a_context, (uint8_t)(value & 0xf)); } } static uint8_t userport_rtc_read_pbx(uint8_t orig) { uint8_t retval = 0xf; if (read_line_active) { retval = rtc58321a_read(rtc58321a_context); } return retval; } /* ---------------------------------------------------------------------*/ /* UP_RTC_58321A snapshot module format: type | name | description -------------------------- BYTE | read | read line active BYTE | rtcsave | save rtc offset when detaching */ static const char snap_module_name[] = "UP_RTC_58321A"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 static int userport_rtc_write_snapshot_module(snapshot_t *s) { snapshot_module_t *m; m = snapshot_module_create(s, snap_module_name, SNAP_MAJOR, SNAP_MINOR); if (m == NULL) { return -1; } if (0 || (SMW_B(m, (uint8_t)read_line_active) < 0) || (SMW_B(m, (uint8_t)rtc58321a_rtc_save) < 0)) { snapshot_module_close(m); return -1; } snapshot_module_close(m); return rtc58321a_write_snapshot(rtc58321a_context, s); } static int userport_rtc_read_snapshot_module(snapshot_t *s) { uint8_t major_version, minor_version; snapshot_module_t *m; m = snapshot_module_open(s, snap_module_name, &major_version, &minor_version); if (m == NULL) { return -1; } /* Do not accept versions higher than current */ if (snapshot_version_is_bigger(major_version, minor_version, SNAP_MAJOR, SNAP_MINOR)) { snapshot_set_error(SNAPSHOT_MODULE_HIGHER_VERSION); goto fail; } if (0 || (SMR_B_INT(m, &read_line_active) < 0) || (SMR_B_INT(m, &rtc58321a_rtc_save) < 0)) { goto fail; } snapshot_module_close(m); return rtc58321a_read_snapshot(rtc58321a_context, s); fail: snapshot_module_close(m); return -1; }