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Code Issues Projects Releases Packages Wiki Activity Actions 3

videoart: add vram read

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This commit is contained in:
hap 2023-10-27 17:43:04 +02:00
parent 347048d78c
commit e2eb4551ce
4 changed files with 49 additions and 27 deletions
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3
hash/videoart.xml
View file

@ -7,9 +7,10 @@ license:CC0-1.0
<!--
Known released LJN Video Art Activity Cartridges (9 total):
Titles taken from cartridge label/manual, title screen can differ a bit for some.
Activity Cartridge (pack-in)
A Trip To The Zoo!
Activity Cartridge (pack-in)
Disney Coloring Book
Disney Story Book
Looney Tunes

6
src/devices/video/ef9365.cpp
View file

@ -214,7 +214,7 @@ void ef9365_device::set_nb_bitplanes(int nb_bitplanes)
if (nb_bitplanes > 0 && nb_bitplanes <= 8)
{
m_nb_of_bitplanes = nb_bitplanes;
m_nb_of_colors = pow(2, nb_bitplanes);
m_nb_of_colors = 1 << nb_bitplanes;
}
}
@ -329,6 +329,7 @@ void ef9365_device::device_start()
save_item(NAME(m_bf));
save_item(NAME(m_state));
save_item(NAME(m_msl));
save_item(NAME(m_readback_latch_pix_offset));
save_item(NAME(m_irq_state));
save_item(NAME(m_irq_vb));
@ -846,6 +847,7 @@ int ef9365_device::cycles_to_us(int cycles)
void ef9365_device::dump_bitplanes_word()
{
int pixel_ptr = (((m_bitplane_yres - 1) - (get_y_reg() & (m_bitplane_yres - 1))) * m_bitplane_xres) + (get_x_reg() & (m_bitplane_xres - 1));
m_readback_latch_pix_offset = pixel_ptr & 7;
LOG("dump : x = %d , y = %d\n", get_x_reg(), get_y_reg());
@ -857,8 +859,6 @@ void ef9365_device::dump_bitplanes_word()
else
m_readback_latch[p] = (value >> 4) & 0xf;
}
m_readback_latch_pix_offset = pixel_ptr & 3;
}
//-------------------------------------------------

59
src/mame/misc/videoart.cpp
View file

@ -15,15 +15,14 @@ Drawing with the same color as the picture outline is not allowed.
Hardware notes:
- EF6805R2P @ 3.57Mhz (14.318MHz XTAL)
- EF9367P @ 1.507MHz, 128*208 resolution (internally 512*208), 16 colors
- TSGB01019ACP unknown 48-pin DIP, interfaces with EF9367P and DRAM
- TSGB01019ACP 48-pin DIP gate array (die label: MOSTEK (C) 1984, MK GB 1000 HAA),
interfaces with EF9367P and DRAM
- 2*D41416C-15 (16Kbit*4) DRAM
- 36-pin cartridge slot, 8KB or 16KB ROM
- DB9 joystick port, no known peripherals other than the default analog joystick
- RF NTSC video, no sound
TODO:
- gaps in fast pencil drawing when the outline color is 0xf and background color
is 0x0 (eg. activity cartridge default), it works fine everywhere else
- custom chip command upper bits meaning is unknown
- palette is approximated from photos/videos
@ -80,6 +79,7 @@ private:
void vram_map(address_map &map);
void vram_w(offs_t offset, u8 data);
u8 vram_r(offs_t offset);
void porta_w(u8 data);
u8 porta_r();
@ -90,11 +90,12 @@ private:
u8 m_porta = 0xff;
u8 m_portb = 0xff;
u8 m_portc = 0xff;
u8 m_rdata = 0xff;
u8 m_efdata = 0xff;
u8 m_romlatch = 0;
u8 m_ccount = 0;
u8 m_command = 0;
u8 m_color = 0;
u8 m_vramdata = 0;
};
@ -111,11 +112,12 @@ void videoart_state::machine_start()
save_item(NAME(m_porta));
save_item(NAME(m_portb));
save_item(NAME(m_portc));
save_item(NAME(m_rdata));
save_item(NAME(m_efdata));
save_item(NAME(m_romlatch));
save_item(NAME(m_ccount));
save_item(NAME(m_command));
save_item(NAME(m_color));
save_item(NAME(m_vramdata));
}
DEVICE_IMAGE_LOAD_MEMBER(videoart_state::cart_load)
@ -167,7 +169,7 @@ u32 videoart_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, c
// width of 512 compressed down to 128
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
bitmap.pix(y, x) = m_vram[(y << 7 | x >> 2) & 0x7fff];
bitmap.pix(y, x) = m_vram[(y << 7 | x >> 2) & 0x7fff] & 0xf;
return 0;
}
@ -179,14 +181,26 @@ void videoart_state::vram_w(offs_t offset, u8 data)
offset = offset << 1 | BIT(low, 2);
if (data)
m_vram[offset] = m_color & 0xf;
m_vram[offset] = m_color;
else
m_vram[offset] ^= 0xf;
}
u8 videoart_state::vram_r(offs_t offset)
{
int low = 0;
m_ef9367->get_last_readback_word(0, &low);
offset = offset << 1 | BIT(low, 2);
if (!machine().side_effects_disabled())
m_vramdata = m_vram[offset];
return 0;
}
void videoart_state::vram_map(address_map &map)
{
map(0x0000, 0x3fff).w(FUNC(videoart_state::vram_w)).nopr();
map(0x0000, 0x3fff).rw(FUNC(videoart_state::vram_r), FUNC(videoart_state::vram_w));
}
@ -198,25 +212,32 @@ void videoart_state::vram_map(address_map &map)
void videoart_state::porta_w(u8 data)
{
// A0-A7: EF9367 data
// A0,A1: TSG command
// A0,A1: custom chip command data
m_porta = data;
}
u8 videoart_state::porta_r()
{
u8 data = 0xff;
u8 data = 0;
// read EF9367 data
if (~m_portb & 1)
data |= m_efdata;
// read vram data
if (~m_portb & 4)
{
u8 shift = (m_ccount & 1) * 2;
data |= m_vramdata >> shift;
}
// read cartridge data
if (~m_portb & 0x10)
{
u16 offset = m_romlatch << 8 | m_portc;
data &= m_cart->read_rom(offset);
data |= m_cart->read_rom(offset);
}
// read EF9367 data
if (~m_portb & 1)
data &= m_rdata;
return data;
}
@ -226,7 +247,7 @@ void videoart_state::portb_w(u8 data)
if (~data & m_portb & 1)
{
if (m_portc & 0x10)
m_rdata = m_ef9367->data_r(m_portc & 0xf);
m_efdata = m_ef9367->data_r(m_portc & 0xf);
else
m_ef9367->data_w(m_portc & 0xf, m_porta);
}
@ -235,7 +256,7 @@ void videoart_state::portb_w(u8 data)
if (data & ~m_portb & 2)
m_romlatch = m_portc;
// B2: custom chip command
// B2: shift custom chip command
if (~data & m_portb & 4)
{
m_command = (m_command << 2) | (m_porta & 3);
@ -248,7 +269,7 @@ void videoart_state::portb_w(u8 data)
if (m_ccount == 3)
m_color = m_command & 0xf;
m_ccount++;
m_ccount = (m_ccount + 1) & 3;
}
// B3: erase led
@ -305,7 +326,7 @@ static INPUT_PORTS_START( videoart )
PORT_BIT(0xff, 0x80, IPT_AD_STICK_X) PORT_SENSITIVITY(50) PORT_KEYDELTA(4) PORT_CENTERDELTA(0)
PORT_START("AN2")
PORT_BIT(0xff, 0x80, IPT_AD_STICK_Y) PORT_SENSITIVITY(50) PORT_KEYDELTA(4) PORT_CENTERDELTA(0) PORT_REVERSE
PORT_BIT(0xff, 0x6a, IPT_AD_STICK_Y) PORT_SENSITIVITY(50) PORT_KEYDELTA(4) PORT_CENTERDELTA(0) PORT_REVERSE PORT_MINMAX(0x00, 0xd4)
INPUT_PORTS_END

8
src/mame/skeleton/squale.cpp
View file

@ -210,7 +210,7 @@ uint8_t squale_state::video_ram_read_reg1()
for(p = 0; p < 4 ; p++)
{
if( m_ef9365->get_last_readback_word(p, 0) & 8 )
if( m_ef9365->get_last_readback_word(p, nullptr) & 8 )
{
data |= (0x01 << p);
}
@ -220,7 +220,7 @@ uint8_t squale_state::video_ram_read_reg1()
for(p = 0; p < 4 ; p++)
{
if( m_ef9365->get_last_readback_word(p, 0) & 4 )
if( m_ef9365->get_last_readback_word(p, nullptr) & 4 )
{
data |= (0x01 << p);
}
@ -245,7 +245,7 @@ uint8_t squale_state::video_ram_read_reg2()
for(p = 0; p < 4 ; p++)
{
if( m_ef9365->get_last_readback_word(p, 0) & 2 )
if( m_ef9365->get_last_readback_word(p, nullptr) & 2 )
{
data |= (0x01 << p);
}
@ -255,7 +255,7 @@ uint8_t squale_state::video_ram_read_reg2()
for(p = 0; p < 4 ; p++)
{
if( m_ef9365->get_last_readback_word(p, 0) & 1 )
if( m_ef9365->get_last_readback_word(p, nullptr) & 1 )
{
data |= (0x01 << p);
}