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(MESS) v6809 : last bits

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This commit is contained in:
Robbbert 2013-12-15 09:52:31 +00:00
parent 415e2cc8e9
commit 8093002724
1 changed files with 23 additions and 8 deletions
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31
src/mess/drivers/v6809.c
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@ -37,7 +37,7 @@ ToDo:
- Find the missing character generator rom.
- Add sound. Pressing BEL character issues commands to the timer chip.
- Enable sound, when what seems to be a 6840 bug is fixed.
- Schematic is almost useless, riddled with omissions and errors.
All documents are in French, so no help there. The parts list
@ -72,8 +72,11 @@ public:
, m_crtc(*this, "crtc")
, m_fdc(*this, "fdc")
, m_floppy0(*this, "fdc:0")
, m_speaker(*this, "speaker")
{ }
DECLARE_WRITE_LINE_MEMBER(speaker_en_w);
DECLARE_WRITE_LINE_MEMBER(speaker_w);
DECLARE_READ8_MEMBER(pb_r);
DECLARE_WRITE8_MEMBER(pa_w);
DECLARE_WRITE8_MEMBER(videoram_w);
@ -85,6 +88,7 @@ public:
const UINT8 *m_p_chargen;
UINT16 m_video_address;
private:
bool m_speaker_en;
UINT8 m_video_index;
UINT8 m_term_data;
UINT8 m_vidbyte;
@ -93,6 +97,7 @@ private:
required_device<mc6845_device> m_crtc;
required_device<mb8876_t> m_fdc;
required_device<floppy_connector> m_floppy0;
required_device<speaker_sound_device> m_speaker;
};
@ -163,10 +168,7 @@ MC6845_UPDATE_ROW( v6809_update_row )
{
mem = (ma + x) & 0x7ff;
chr = state->m_p_videoram[mem];
if (x == cursor_x)
gfx = 0xff;
else
gfx = state->m_p_chargen[(chr<<4) | ra];
gfx = state->m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0);
/* Display a scanline of a character (8 pixels) */
*p++ = palette[BIT(gfx, 7)];
@ -306,13 +308,26 @@ static const pia6821_interface pia1_intf =
DEVCB_CPU_INPUT_LINE("maincpu", M6809_IRQ_LINE) /* IRQB output */
};
// this should output 1 to enable sound, then output 0 after a short time
// however it continuously outputs 1
WRITE_LINE_MEMBER( v6809_state::speaker_en_w )
{
m_speaker_en = state;
}
WRITE_LINE_MEMBER( v6809_state::speaker_w )
{
// if (m_speaker_en)
// m_speaker->level_w(state);
}
static const ptm6840_interface mc6840_intf =
{
XTAL_16MHz / 4,
{ 0, 0, 0 },
{ 4000000/14, 4000000/14, 4000000/14/8 },
{ DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("speaker", speaker_sound_device, level_w),
DEVCB_DEVICE_LINE_MEMBER("speaker", speaker_sound_device, level_w) },
DEVCB_DRIVER_LINE_MEMBER(v6809_state, speaker_w),
DEVCB_DRIVER_LINE_MEMBER(v6809_state, speaker_en_w) },
DEVCB_CPU_INPUT_LINE("maincpu", M6809_IRQ_LINE)
};