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fmtowns: reset CRTC registers on startup to avoid potentially too large video modes. (nw)

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This commit is contained in:
mahlemiut 2017-08-24 14:49:37 +12:00
parent 7bddd5df6d
commit c03d980162
1 changed files with 5 additions and 3 deletions
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8
src/mame/drivers/fmtowns.cpp
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@ -74,6 +74,7 @@
* 0x0600 RW: Keyboard data port (8042)
* 0x0602 : Keyboard control port (8042)
* 0x0604 : (8042)
* 0x0a00-08: RS-232C interface (i8251)
* 0x3000 - 0x3fff : CMOS RAM
* 0xfd90-a0: CRTC / Video
* 0xff81: CRTC / Video - returns value in RAM location 0xcff81?
@ -2593,7 +2594,10 @@ void towns_state::driver_start()
m_towns_status_timer = timer_alloc(TIMER_CDSTATUS);
m_towns_cdda_timer = timer_alloc(TIMER_CDDA);
// CD-ROM init
memset(&m_video,0,sizeof(struct towns_video_controller));
memset(&m_towns_cd,0,sizeof(struct towns_cdrom_controller));
m_towns_cd.status = 0x01; // CDROM controller ready
m_towns_cd.buffer_ptr = -1;
m_towns_cd.read_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(towns_state::towns_cdrom_read_byte),this), (void*)machine().device("dma_1"));
m_maincpu->space(AS_PROGRAM).install_ram(0x100000,m_ram->size()-1,nullptr);
@ -2632,8 +2636,6 @@ void towns_state::machine_reset()
m_towns_kb_irq1_enable = 0;
m_towns_pad_mask = 0x7f;
m_towns_mouse_output = MOUSE_START;
m_towns_cd.status = 0x01; // CDROM controller ready
m_towns_cd.buffer_ptr = -1;
m_towns_volume_select = 0;
m_intervaltimer2_period = 0;
m_intervaltimer2_timeout_flag = 0;