235 lines
7.2 KiB
JavaScript
235 lines
7.2 KiB
JavaScript
/**************************************************************************
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* SAE - Scripted Amiga Emulator
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*
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* https://github.com/naTmeg/ScriptedAmigaEmulator
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*
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* ©2012 Rupert Hausberger
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* Commercial use is prohibited.
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*
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**************************************************************************/
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function RTC() {
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const RF5C01A_RAM_SIZE = 16;
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var clock_control_d;
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var clock_control_e;
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var clock_control_f;
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var rtc_memory = null;
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var rtc_alarm = null;
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this.read = function () {
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/*struct zfile *f;
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f = zfile_fopen (currprefs.flashfile, "rb", ZFD_NORMAL);
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if (f) {
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zfile_fread (rtc_memory, RF5C01A_RAM_SIZE, 1, f);
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zfile_fread (rtc_alarm, RF5C01A_RAM_SIZE, 1, f);
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zfile_fclose (f);
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}*/
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};
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this.write = function () {
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/*struct zfile *f = zfile_fopen (currprefs.flashfile, L"rb+", ZFD_NORMAL);
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if (!f) {
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f = zfile_fopen (currprefs.flashfile, L"wb", 0);
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if (f) {
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zfile_fwrite (rtc_memory, RF5C01A_RAM_SIZE, 1, f);
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zfile_fwrite (rtc_alarm, RF5C01A_RAM_SIZE, 1, f);
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zfile_fclose (f);
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}
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return;
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}
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zfile_fseek (f, 0, SEEK_END);
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if (zfile_ftell (f) <= 2 * RF5C01A_RAM_SIZE) {
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zfile_fseek (f, 0, SEEK_SET);
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zfile_fwrite (rtc_memory, RF5C01A_RAM_SIZE, 1, f);
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zfile_fwrite (rtc_alarm, RF5C01A_RAM_SIZE, 1, f);
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}
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zfile_fclose (f);*/
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};
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this.setup = function () {
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BUG.info('RTC.setup() type ' + (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_MSM6242B ? 'MSM6242B' : 'RF5C01A'));
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if (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_MSM6242B) {
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clock_control_d = 0x1;
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clock_control_e = 0;
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clock_control_f = 0x4;
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/* 24/12 */
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} else if (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_RF5C01A) {
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clock_control_d = 0x4;
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/* Timer EN */
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clock_control_e = 0;
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clock_control_f = 0;
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rtc_memory = new Uint8Array(RF5C01A_RAM_SIZE);
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rtc_alarm = new Uint8Array(RF5C01A_RAM_SIZE);
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for (var i = 0; i < RF5C01A_RAM_SIZE; i++)
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rtc_memory[i] = rtc_alarm[i] = 0;
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this.read();
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}
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};
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this.load8 = function (addr) {
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addr &= 0x3f;
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if ((addr & 3) == 2 || (addr & 3) == 0 || AMIGA.config.rtc.type == SAEV_Config_RTC_Type_None) {
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if (AMIGA.config.cpu.model == 68000 && AMIGA.config.cpu.compatible)
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return 0xff; //regs.irc >> 8;
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return 0;
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}
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var t = new Date();
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addr >>= 2;
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if (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_MSM6242B) {
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switch (addr) {
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case 0x0:
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return t.getSeconds() % 10;
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case 0x1:
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return Math.floor(t.getSeconds() / 10);
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case 0x2:
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return t.getMinutes() % 10;
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case 0x3:
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return Math.floor(t.getMinutes() / 10);
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case 0x4:
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return t.getHours() % 10;
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case 0x5:
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return Math.floor(t.getHours() / 10);
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case 0x6:
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return t.getDate() % 10;
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case 0x7:
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return Math.floor(t.getDate() / 10);
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case 0x8:
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return (t.getMonth() + 1) % 10;
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case 0x9:
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return Math.floor((t.getMonth() + 1) / 10);
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case 0xA:
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return (t.getFullYear() - 1900) % 10;
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case 0xB:
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return Math.floor((t.getFullYear() - 1900) / 10);
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case 0xC:
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return t.getDay();
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case 0xD:
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return clock_control_d;
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case 0xE:
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return clock_control_e;
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case 0xF:
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return clock_control_f;
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}
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} else if (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_RF5C01A) {
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var bank = clock_control_d & 3;
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if (bank >= 2 && addr < 0x0d) return (rtc_memory[addr] >> ((bank == 2) ? 0 : 4)) & 0x0f;
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if (bank == 1 && addr < 0x0d) return rtc_alarm[addr];
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switch (addr) {
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case 0x0:
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return t.getSeconds() % 10;
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case 0x1:
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return Math.floor(t.getSeconds() / 10);
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case 0x2:
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return t.getMinutes() % 10;
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case 0x3:
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return Math.floor(t.getMinutes() / 10);
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case 0x4:
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return t.getHours() % 10;
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case 0x5:
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return Math.floor(t.getHours() / 10);
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case 0x6:
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return t.getDate() % 10;
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case 0x7:
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return Math.floor(t.getDate() / 10);
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case 0x8:
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return (t.getMonth() + 1) % 10;
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case 0x9:
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return Math.floor((t.getMonth() + 1) / 10);
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case 0xA:
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return (t.getFullYear() - 1900) % 10;
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case 0xB:
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return Math.floor((t.getFullYear() - 1900) / 10);
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case 0xC:
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return t.getDay();
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case 0xD:
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return clock_control_d;
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/* E and F = write-only */
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}
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}
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return 0;
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};
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this.load16 = function (addr) {
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return (this.load8(addr) << 8) | this.load8(addr + 1);
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};
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this.load32 = function (addr) {
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return ((this.load16(addr) << 16) | this.load16(addr + 2)) >>> 0;
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};
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this.store8 = function (addr, value) {
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addr &= 0x3f;
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if ((addr & 1) != 1 || AMIGA.config.rtc.type == SAEV_Config_RTC_Type_None) return;
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addr >>= 2;
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value &= 0x0f;
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if (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_MSM6242B) {
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switch (addr) {
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case 0xD:
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clock_control_d = value & (1 | 8);
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break;
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case 0xE:
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clock_control_e = value;
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break;
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case 0xF:
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clock_control_f = value;
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break;
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}
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} else if (AMIGA.config.rtc.type == SAEV_Config_RTC_Type_RF5C01A) {
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var bank = clock_control_d & 3;
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if (bank >= 2 && addr < 0x0d) {
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rtc_memory[addr] &= ((bank == 2) ? 0xf0 : 0x0f);
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rtc_memory[addr] |= value << ((bank == 2) ? 0 : 4);
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//var ov = rtc_memory[addr];
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if (rtc_memory[addr] != value) this.write();
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return;
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}
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if (bank == 1 && addr < 0x0d) {
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rtc_alarm[addr] = value;
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rtc_alarm[0] = rtc_alarm[1] = rtc_alarm[9] = rtc_alarm[12] = 0;
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rtc_alarm[3] &= ~0x8;
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rtc_alarm[5] &= ~0xc;
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rtc_alarm[6] &= ~0x8;
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rtc_alarm[8] &= ~0xc;
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rtc_alarm[10] &= ~0xe;
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rtc_alarm[11] &= ~0xc;
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//var ov = rtc_alarm[addr];
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if (rtc_alarm[addr] != value) this.write();
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return;
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}
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switch (addr) {
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case 0xD:
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clock_control_d = value;
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break;
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case 0xE:
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clock_control_e = value;
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break;
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case 0xF:
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clock_control_f = value;
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break;
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}
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}
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};
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this.store16 = function (addr, value) {
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this.store8(addr, (value >> 8) & 0xff);
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this.store8(addr + 1, value & 0xff);
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};
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this.store32 = function (addr, value) {
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this.store16(addr, (value >>> 16) & 0xffff);
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this.store16(addr + 2, value & 0xffff);
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}
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}
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