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tv910: Implement video attributes; make self-test work

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This commit is contained in:
AJR 2018-01-19 05:03:59 -05:00
parent d0715c830d
commit c8d173e308
1 changed files with 39 additions and 37 deletions
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76
src/mame/drivers/tv910.cpp
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@ -52,6 +52,7 @@ public:
, m_kbdrom(*this, "keyboard")
, m_kbspecial(*this, "keyb_special")
, m_beep(*this, "bell")
, m_dsw1(*this, "DSW1")
{ }
virtual void machine_start() override;
@ -86,6 +87,7 @@ private:
required_memory_region m_kbdrom;
required_ioport m_kbspecial;
required_device<beep_device> m_beep;
required_ioport m_dsw1;
uint16_t m_lastchar, m_strobe;
uint8_t m_transchar;
@ -385,11 +387,12 @@ static INPUT_PORTS_START( tv910 )
PORT_DIPNAME( 0x80, 0x00, "Duplex" )
PORT_DIPSETTING( 0x00, "Half Duplex" )
PORT_DIPSETTING( 0x80, "Full Duplex" )
#if 0
PORT_DIPNAME( 0x100, 0x000, "Colors" )
PORT_DIPSETTING( 0x00, "Black characters on white screen" )
PORT_DIPSETTING( 0x100, "White characters on black screen" )
PORT_DIPNAME( 0x100, 0x100, "Colors" )
PORT_DIPSETTING( 0x00, "Black characters on green screen" )
PORT_DIPSETTING( 0x100, "Green characters on black screen" )
#if 0
PORT_DIPNAME( 0x200, 0x200, "Data Set Ready" )
PORT_DIPSETTING( 0x00, "DSR connected" )
PORT_DIPSETTING( 0x200, "DSR disconnected" )
@ -424,47 +427,46 @@ WRITE8_MEMBER(tv910_state::vbl_ack_w)
MC6845_UPDATE_ROW( tv910_state::crtc_update_row )
{
uint32_t *p = &bitmap.pix32(y);
uint16_t chr_base = (ra + 1) & 7;
uint16_t chr_base = ra & 7;
uint8_t chr = m_vram[0x7ff];
uint8_t att = (chr & 0xf0) == 0x90 ? chr & 0x0f : 0;
bool bow = BIT(m_dsw1->read(), 8);
for (int i = 0; i < x_count; i++)
{
uint16_t offset = ( ma + i ) & 0x7ff;
uint8_t chr = m_vram[ offset ];
uint8_t data = m_chrrom[ chr_base + chr * 8 ];
bool att_blk = (chr & 0xf0) == 0x90;
bool half_int = BIT(chr, 7) && !att_blk;
if (att_blk)
att = chr & 0x0f;
uint8_t data = m_chrrom[chr_base | (chr & 0x7f) << 3];
rgb_t fg = rgb_t::green();
rgb_t bg = rgb_t::black();
if (half_int)
fg = rgb_t(fg.r() / 2, fg.g() / 2, fg.b() / 2);
if ( i == cursor_x )
{
if (m_control & 2)
{
data = 0xFF;
}
}
if (ra == 9)
data = BIT(att, 3) ? 0xff : 0;
else if (ra == 0 || att_blk || BIT(att, 0) || (BIT(att, 1) && BIT(m_control, 1)))
data = 0;
if ((y % 10) >= 8)
{
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
*p++ = rgb_t::black();
}
else
{
*p = BIT(data, 7) ? fg : bg; p++;
*p = BIT(data, 6) ? fg : bg; p++;
*p = BIT(data, 5) ? fg : bg; p++;
*p = BIT(data, 4) ? fg : bg; p++;
*p = BIT(data, 3) ? fg : bg; p++;
*p = BIT(data, 2) ? fg : bg; p++;
*p = BIT(data, 1) ? fg : bg; p++;
*p = BIT(data, 0) ? fg : bg; p++;
}
if (i == cursor_x && BIT(m_control, 1))
data ^= 0xff;
if (BIT(att, 2))
data ^= 0xff;
if (bow)
data ^= 0xff;
*p = BIT(data, 7) ? bg : fg; p++;
*p = BIT(data, 6) ? bg : fg; p++;
*p = BIT(data, 5) ? bg : fg; p++;
*p = BIT(data, 4) ? bg : fg; p++;
*p = BIT(data, 3) ? bg : fg; p++;
*p = BIT(data, 2) ? bg : fg; p++;
*p = BIT(data, 1) ? bg : fg; p++;
*p = BIT(data, 0) ? bg : fg; p++;
}
}
@ -477,7 +479,7 @@ MACHINE_CONFIG_START(tv910_state::tv910)
MCFG_INPUT_MERGER_OUTPUT_HANDLER(INPUTLINE("maincpu", M6502_IRQ_LINE))
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_RAW_PARAMS(MASTER_CLOCK, 882, 0, 720, 370, 0, 350 ) // not real values
MCFG_SCREEN_RAW_PARAMS(MASTER_CLOCK, 720, 0, 640, 315, 0, 250)
MCFG_SCREEN_UPDATE_DEVICE( CRTC_TAG, r6545_1_device, screen_update )
MCFG_MC6845_ADD(CRTC_TAG, R6545_1, "screen", MASTER_CLOCK/8)