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cardline.cpp: borrowed hap's workaround for missing save state support for the outputs. Fixes long-standing save state problem (nw)

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This commit is contained in:
Ivan Vangelista 2019-04-29 13:17:59 +02:00
parent f7c756c214
commit 08474a90de
1 changed files with 25 additions and 17 deletions
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42
src/mame/drivers/cardline.cpp
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@ -17,6 +17,7 @@
TODO:
Really understand ASIC chip
Remove device_post_load once outputs support savestates
***********************************/
@ -51,6 +52,7 @@ public:
protected:
virtual void machine_start() override;
virtual void device_post_load() override;
private:
DECLARE_WRITE8_MEMBER(vram_w);
@ -78,6 +80,7 @@ private:
uint8_t m_video;
uint8_t m_hsync_q;
uint8_t m_lamps_cache[8];
required_device<i80c32_device> m_maincpu;
required_device<gfxdecode_device> m_gfxdecode;
@ -91,12 +94,19 @@ void cardline_state::machine_start()
m_lamps.resolve();
m_video = 0;
m_hsync_q = 1;
memset(m_lamps_cache, 0, sizeof(m_lamps_cache));
for (int i = 0; i < 0x2000; i++)
m_maincpu.target()->space(AS_IO).write_byte(i, 0x73);
save_item(NAME(m_video));
save_item(NAME(m_hsync_q));
save_item(NAME(m_lamps_cache));
}
void cardline_state::device_post_load()
{
for (int i = 0; i < 8; i++)
m_lamps[i] = m_lamps_cache[i];
}
MC6845_BEGIN_UPDATE( cardline_state::crtc_begin_update )
{
@ -105,16 +115,14 @@ MC6845_BEGIN_UPDATE( cardline_state::crtc_begin_update )
MC6845_UPDATE_ROW( cardline_state::crtc_update_row )
{
uint8_t *gfx;
uint16_t x = 0;
int gfx_ofs;
const rgb_t *palette = m_palette->palette()->entry_list_raw();
gfx_ofs = 0;
int gfx_ofs = 0;
// bits 0 and 1 seem to be chip select lines. None of those selected
// most likely would put the output lines into a floating (threestate)
// state. The next statement doesn't add functioality but documents
// state. The next statement doesn't add functionality but documents
// how this works.
if(m_video & 1)
@ -123,7 +131,7 @@ MC6845_UPDATE_ROW( cardline_state::crtc_update_row )
if(m_video & 2)
gfx_ofs = 0x1000;
gfx = memregion("gfx1")->base();
uint8_t *gfx = memregion("gfx1")->base();
for (uint8_t cx = 0; cx < x_count; cx++)
{
@ -163,7 +171,7 @@ WRITE_LINE_MEMBER(cardline_state::vsync_changed)
WRITE8_MEMBER(cardline_state::a3003_w)
{
/* seems a generate a signal when address is written to */
/* seems to generate a signal when address is written to */
}
WRITE8_MEMBER(cardline_state::vram_w)
@ -209,14 +217,14 @@ READ8_MEMBER(cardline_state::hsync_r)
WRITE8_MEMBER(cardline_state::lamps_w)
{
/* button lamps 1-8 (collect, card 1-5, bet, start) */
m_lamps[5] = BIT(data, 0);
m_lamps[0] = BIT(data, 1);
m_lamps[1] = BIT(data, 2);
m_lamps[2] = BIT(data, 3);
m_lamps[3] = BIT(data, 4);
m_lamps[4] = BIT(data, 5);
m_lamps[6] = BIT(data, 6);
m_lamps[7] = BIT(data, 7);
m_lamps_cache[5] = m_lamps[5] = BIT(data, 0);
m_lamps_cache[0] = m_lamps[0] = BIT(data, 1);
m_lamps_cache[1] = m_lamps[1] = BIT(data, 2);
m_lamps_cache[2] = m_lamps[2] = BIT(data, 3);
m_lamps_cache[3] = m_lamps[3] = BIT(data, 4);
m_lamps_cache[4] = m_lamps[4] = BIT(data, 5);
m_lamps_cache[6] = m_lamps[6] = BIT(data, 6);
m_lamps_cache[7] = m_lamps[7] = BIT(data, 7);
}
void cardline_state::mem_prg(address_map &map)
@ -232,13 +240,13 @@ void cardline_state::mem_io(address_map &map)
map(0x2006, 0x2006).portr("DSW");
map(0x2007, 0x2007).w(FUNC(cardline_state::lamps_w));
map(0x2008, 0x2008).noprw(); // set to 1 during coin input
//AM_RANGE(0x2080, 0x213f) AM_NOP // ????
//map(0x2080, 0x213f).noprw(); // ????
map(0x2100, 0x213f).rw(FUNC(cardline_state::asic_r), FUNC(cardline_state::asic_w));
map(0x2400, 0x2400).rw("oki", FUNC(okim6295_device::read), FUNC(okim6295_device::write));
map(0x2800, 0x2800).w("crtc", FUNC(mc6845_device::address_w));
map(0x2801, 0x2801).w("crtc", FUNC(mc6845_device::register_w));
//AM_RANGE(0x2840, 0x2840) AM_NOP // ???
//AM_RANGE(0x2880, 0x2880) AM_NOP // ???
//map(0x2840, 0x2840).noprw(); // ???
//map(0x2880, 0x2880).noprw(); // ???
map(0x3003, 0x3003).w(FUNC(cardline_state::a3003_w));
map(0xc000, 0xdfff).w(FUNC(cardline_state::vram_w)).share("videoram");
map(0xe000, 0xffff).w(FUNC(cardline_state::attr_w)).share("colorram");