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advision: add confsetting for the interpolation

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This commit is contained in:
hap 2022-10-11 17:13:07 +02:00
parent fecf31406e
commit fa92ed8a37
1 changed files with 23 additions and 15 deletions
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38
src/mame/entex/advision.cpp
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@ -2,12 +2,12 @@
// copyright-holders:Dan Boris, hap
/*******************************************************************************
Entex Adventure Vision, tabletop video game console
Entex Adventure Vision, tabletop game console
Hardware notes:
- INS8048-11 @ 11MHz (1KB internal ROM)
- COP411 for the sound, 1-bit speaker with volume control
- molex socket for 4KB cartridges
- Molex socket for 4KB cartridges
- 1KB external RAM (2*MM2114N)
- 40 small rectangular red LEDs, a motor with a fast spinning mirror gives the
illusion of a 150*40 screen
@ -19,7 +19,8 @@ A game cartridge is basically an EPROM chip wearing a jacket, there is no
dedicated cartridge slot as is common on other consoles. Only 4 games were
released in total.
The mirror rotates at around 7Hz, the motor speed is not controlled by software.
The mirror rotates at around 7Hz, the motor speed is not controlled by software,
and it differs a bit per console. This can be adjusted after enabling -cheat.
There's a mirror on both sides so the display refreshes at around 14Hz. A similar
technology was later used in the Nintendo Virtual Boy.
@ -28,6 +29,9 @@ width of 150 is specified by the BIOS, but it's possible to update the leds at a
different rate, hence MAME configures a larger screen. In fact, the homebrew demo
Code Red doesn't use the BIOS for it, and runs at 50*40 to save some RAM.
It's recommended to leave bilinear filtering on (it's the default for most of
MAME's video backends).
TODO:
- EA banking is ugly, it can be turd-polished but the real issue is in mcs48
- display refresh is actually ~14Hz, but doing that will make MAME very sluggish
@ -72,6 +76,7 @@ public:
, m_cart(*this, "cartslot")
, m_ea_bank(*this, "ea_bank")
, m_joy(*this, "JOY")
, m_conf(*this, "CONF")
{ }
void advision(machine_config &config);
@ -92,6 +97,7 @@ private:
required_device<generic_slot_device> m_cart;
required_memory_bank m_ea_bank;
required_ioport m_joy;
required_ioport m_conf;
void io_map(address_map &map);
void program_map(address_map &map);
@ -137,6 +143,8 @@ private:
u32 advision_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
bool hint_enable = bool(m_conf->read() & 1);
for (int y = 0; y < 40; y++)
{
u8 *src = &m_display[y * DISPLAY_WIDTH];
@ -148,17 +156,11 @@ u32 advision_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, c
if (cliprect.contains(dx, dy))
{
u8 red = 0xff;
u8 red = src[x] ? 0xff : 0;
if (src[x] == 0)
{
// do some horizontal interpolation
int prev = 0;
for (int i = 1; i < 5; i++)
prev += ((x - i) < 0) ? 0 : src[x - i];
red = (prev * 0xff) / 4;
}
// do some horizontal interpolation
if (hint_enable && red == 0 && dx > 0)
red = (bitmap.pix(dy, dx - 1) >> 16 & 0xff) * 0.75;
u8 green = red / 16;
u8 blue = red / 12;
@ -177,8 +179,9 @@ void advision_state::av_control_w(u8 data)
m_video_bank = data >> 5 & 7;
// disable led outputs (there is some delay before it takes effect)
// see for example codered twister and anime girl, gaps between the 'pixels' should be visible but minimal
if (m_video_bank == 0)
m_led_off->adjust(attotime::from_usec(50));
m_led_off->adjust(attotime::from_usec(39));
// P24 rising edge: transfer led latches to outputs
if (!m_video_strobe && bool(data & 0x10))
@ -348,6 +351,11 @@ static INPUT_PORTS_START( advision )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
PORT_START("CONF")
PORT_CONFNAME( 0x01, 0x01, "H Interpolation" )
PORT_CONFSETTING( 0x00, DEF_STR( Off ) )
PORT_CONFSETTING( 0x01, DEF_STR( On ) )
INPUT_PORTS_END
@ -414,7 +422,7 @@ void advision_state::advision(machine_config &config)
m_maincpu->p2_out_cb().set(FUNC(advision_state::av_control_w));
m_maincpu->t1_in_cb().set(FUNC(advision_state::vsync_r));
COP411(config, m_soundcpu, 210000); // COP411L-KCN/N, R11=82k, C8=56pF
COP411(config, m_soundcpu, 200000); // COP411L-KCN/N, R11=82k, C8=56pF
m_soundcpu->set_config(COP400_CKI_DIVISOR_4, COP400_CKO_RAM_POWER_SUPPLY, false);
m_soundcpu->read_l().set(FUNC(advision_state::sound_cmd_r));
m_soundcpu->write_g().set(FUNC(advision_state::sound_g_w));