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ma6710: Hook up ROM bank switch

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This commit is contained in:
AJR 2021-05-03 19:09:32 -04:00
parent 7b2c14b552
commit a49e8e1377
1 changed files with 15 additions and 2 deletions
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17
src/mame/drivers/merit3xx.cpp
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@ -491,6 +491,8 @@ Dipswitch on CRT-352 MEM is labeled SW1
#include "sound/ay8910.h"
#include "video/mc6845.h"
namespace {
class merit3xx_state : public driver_device
{
public:
@ -508,6 +510,8 @@ protected:
private:
MC6845_UPDATE_ROW(update_row);
void ppi1_pa_w(u8 data);
void main_map(address_map &map);
void io_map(address_map &map);
@ -519,13 +523,18 @@ void merit3xx_state::machine_start()
{
memory_region *rom = memregion("maincpu");
m_rombank->configure_entries(0, rom->bytes() / 0x8000, rom->base(), 0x8000);
m_rombank->set_entry(1);
}
MC6845_UPDATE_ROW(merit3xx_state::update_row)
{
}
void merit3xx_state::ppi1_pa_w(u8 data)
{
// OK for ma6710; others likely need something very different
m_rombank->set_entry((data & 0x04) >> 1 | (~data & 0x01));
}
void merit3xx_state::main_map(address_map &map)
{
map(0x0000, 0x7fff).bankr("rombank");
@ -556,7 +565,9 @@ void merit3xx_state::merit3xx(machine_config &config)
//NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);
I8255(config, "ppi0");
I8255(config, "ppi1");
i8255_device &ppi1(I8255(config, "ppi1"));
ppi1.out_pa_callback().set(FUNC(merit3xx_state::ppi1_pa_w));
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(10_MHz_XTAL, 616, 0, 512, 270, 0, 256);
@ -652,6 +663,8 @@ ROM_START( ma7558 )
ROM_LOAD( "dallas_ds1230y-200.u17", 0x2000, 0x8000, CRC(9d196d52) SHA1(21fd5acd7652ba10ae6b4ae520abcc7c34eb37d1) )
ROM_END
} // anonymous namespace
// CRT-300 games
GAME( 1989, ma6710, 0, merit3xx, merit3xx, merit3xx_state, empty_init, ROT0, "Merit", "Multi-Action 6710-13", MACHINE_IS_SKELETON )