diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c index eb7d3a9cbd..a39117144c 100644 --- a/hw/m68k/next-cube.c +++ b/hw/m68k/next-cube.c @@ -190,6 +190,48 @@ static void next_scr2_rtc_update(NeXTPC *s) if (rtc->phase < 8) { rtc->command = (rtc->command << 1) | ((scr2_2 & SCR2_RTDATA) ? 1 : 0); + + if (rtc->phase == 7 && !next_rtc_cmd_is_write(rtc->command)) { + if (rtc->command <= 0x1f) { + /* RAM registers */ + rtc->retval = rtc->ram[rtc->command]; + } + if ((rtc->command >= 0x20) && (rtc->command <= 0x2F)) { + /* RTC */ + time_t time_h = time(NULL); + struct tm *info = localtime(&time_h); + rtc->retval = 0; + + switch (rtc->command) { + case 0x20: + rtc->retval = SCR2_TOBCD(info->tm_sec); + break; + case 0x21: + rtc->retval = SCR2_TOBCD(info->tm_min); + break; + case 0x22: + rtc->retval = SCR2_TOBCD(info->tm_hour); + break; + case 0x24: + rtc->retval = SCR2_TOBCD(info->tm_mday); + break; + case 0x25: + rtc->retval = SCR2_TOBCD((info->tm_mon + 1)); + break; + case 0x26: + rtc->retval = SCR2_TOBCD((info->tm_year - 100)); + break; + } + } + if (rtc->command == 0x30) { + /* read the status 0x30 */ + rtc->retval = rtc->status; + } + if (rtc->command == 0x31) { + /* read the control 0x31 */ + rtc->retval = rtc->control; + } + } } if (rtc->phase >= 8 && rtc->phase < 16) { if (next_rtc_cmd_is_write(rtc->command)) { @@ -198,85 +240,24 @@ static void next_scr2_rtc_update(NeXTPC *s) ((scr2_2 & SCR2_RTDATA) ? 1 : 0); } else { /* Shift out value to read */ - - /* if we read RAM register, output RT_DATA bit */ - if (rtc->command <= 0x1F) { - scr2_2 = scr2_2 & (~SCR2_RTDATA); - if (rtc->ram[rtc->command] & - (0x80 >> (rtc->phase - 8))) { - scr2_2 |= SCR2_RTDATA; - } - - rtc->retval = (rtc->retval << 1) | - ((scr2_2 & SCR2_RTDATA) ? 1 : 0); - } - /* read the status 0x30 */ - if (rtc->command == 0x30) { - scr2_2 = scr2_2 & (~SCR2_RTDATA); - /* for now status = 0x98 (new rtc + FTU) */ - if (rtc->status & (0x80 >> (rtc->phase - 8))) { - scr2_2 |= SCR2_RTDATA; - } - - rtc->retval = (rtc->retval << 1) | - ((scr2_2 & SCR2_RTDATA) ? 1 : 0); - } - /* read the status 0x31 */ - if (rtc->command == 0x31) { - scr2_2 = scr2_2 & (~SCR2_RTDATA); - if (rtc->control & (0x80 >> (rtc->phase - 8))) { - scr2_2 |= SCR2_RTDATA; - } - rtc->retval = (rtc->retval << 1) | - ((scr2_2 & SCR2_RTDATA) ? 1 : 0); - } - - if ((rtc->command >= 0x20) && (rtc->command <= 0x2F)) { - scr2_2 = scr2_2 & (~SCR2_RTDATA); - /* for now 0x00 */ - time_t time_h = time(NULL); - struct tm *info = localtime(&time_h); - int ret = 0; - - switch (rtc->command) { - case 0x20: - ret = SCR2_TOBCD(info->tm_sec); - break; - case 0x21: - ret = SCR2_TOBCD(info->tm_min); - break; - case 0x22: - ret = SCR2_TOBCD(info->tm_hour); - break; - case 0x24: - ret = SCR2_TOBCD(info->tm_mday); - break; - case 0x25: - ret = SCR2_TOBCD((info->tm_mon + 1)); - break; - case 0x26: - ret = SCR2_TOBCD((info->tm_year - 100)); - break; - } - - if (ret & (0x80 >> (rtc->phase - 8))) { - scr2_2 |= SCR2_RTDATA; - } - rtc->retval = (rtc->retval << 1) | - ((scr2_2 & SCR2_RTDATA) ? 1 : 0); + if (rtc->retval & (0x80 >> (rtc->phase - 8))) { + scr2_2 |= SCR2_RTDATA; + } else { + scr2_2 &= ~SCR2_RTDATA; } } } rtc->phase++; - if (rtc->phase == 16) { - if (rtc->command >= 0x80 && rtc->command <= 0x9F) { + if (rtc->phase == 16 && next_rtc_cmd_is_write(rtc->command)) { + if (rtc->command >= 0x80 && rtc->command <= 0x9f) { + /* RAM registers */ rtc->ram[rtc->command - 0x80] = rtc->value; } - /* write to x30 register */ - if (rtc->command == 0xB1) { - /* clear FTU */ + if (rtc->command == 0xb1) { + /* write to 0x30 register */ if (rtc->value & 0x04) { + /* clear FTU */ rtc->status = rtc->status & (~0x18); qemu_irq_lower(s->rtc_power_irq); }