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Read-back for paletteram

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This commit is contained in:
Angelo Salese 2013-11-06 19:26:08 +00:00
parent 4031bf5ed7
commit 3211293584
2 changed files with 18 additions and 10 deletions
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26
src/emu/video/mb_vcu.c
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@ -41,30 +41,35 @@ static ADDRESS_MAP_START( mb_vcu_pal_ram, AS_1, 8, mb_vcu_device )
AM_RANGE(0x0000, 0x00ff) AM_RAM
AM_RANGE(0x0200, 0x02ff) AM_RAM
AM_RANGE(0x0400, 0x04ff) AM_RAM
AM_RANGE(0x0600, 0x06ff) AM_WRITE(mb_vcu_paletteram_w)
AM_RANGE(0x0600, 0x06ff) AM_READWRITE(mb_vcu_paletteram_r,mb_vcu_paletteram_w)
ADDRESS_MAP_END
READ8_MEMBER( mb_vcu_device::mb_vcu_paletteram_r )
{
return m_palram[offset];
}
WRITE8_MEMBER( mb_vcu_device::mb_vcu_paletteram_w )
{
int r,g,b, bit0, bit1, bit2;
UINT8 colour = data;
m_palram[offset] = data;
/* red component */
bit1 = (colour >> 7) & 0x01;
bit0 = (colour >> 6) & 0x01;
bit1 = (m_palram[offset] >> 7) & 0x01;
bit0 = (m_palram[offset] >> 6) & 0x01;
r = combine_2_weights(m_weights_r, bit0, bit1);
/* green component */
bit2 = (colour >> 5) & 0x01;
bit1 = (colour >> 4) & 0x01;
bit0 = (colour >> 3) & 0x01;
bit2 = (m_palram[offset] >> 5) & 0x01;
bit1 = (m_palram[offset] >> 4) & 0x01;
bit0 = (m_palram[offset] >> 3) & 0x01;
g = combine_3_weights(m_weights_g, bit0, bit1, bit2);
/* blue component */
bit2 = (colour >> 2) & 0x01;
bit1 = (colour >> 1) & 0x01;
bit0 = (colour >> 0) & 0x01;
bit2 = (m_palram[offset] >> 2) & 0x01;
bit1 = (m_palram[offset] >> 1) & 0x01;
bit0 = (m_palram[offset] >> 0) & 0x01;
b = combine_3_weights(m_weights_b, bit0, bit1, bit2);
palette_set_color(machine(), offset, MAKE_RGB(r, g, b));
@ -185,6 +190,7 @@ void mb_vcu_device::device_start()
// TODO: m_screen_tag
m_cpu = machine().device<cpu_device>(m_cpu_tag);
m_ram = auto_alloc_array_clear(machine(), UINT8, 0x800);
m_palram = auto_alloc_array_clear(machine(), UINT8, 0x100);
{
static const int resistances_r[2] = { 4700, 2200 };

2
src/emu/video/mb_vcu.h
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@ -53,6 +53,7 @@ public:
DECLARE_WRITE8_MEMBER( background_color_w );
DECLARE_READ8_MEMBER( status_r );
DECLARE_WRITE8_MEMBER( vbank_w );
DECLARE_READ8_MEMBER( mb_vcu_paletteram_r );
DECLARE_WRITE8_MEMBER( mb_vcu_paletteram_w );
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
@ -75,6 +76,7 @@ private:
const address_space_config m_paletteram_space_config;
UINT8 m_status;
UINT8 *m_ram;
UINT8 *m_palram;
cpu_device *m_cpu;
UINT16 m_param_offset_latch;