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is482: Add CRTC and screen devices (nw)

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This commit is contained in:
AJR 2019-07-06 13:55:49 -04:00
parent d5f741d8a3
commit 79892df498
1 changed files with 21 additions and 5 deletions
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26
src/mame/drivers/is48x.cpp
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@ -10,8 +10,8 @@
#include "cpu/i86/i186.h"
#include "cpu/bcp/dp8344.h"
#include "machine/eeprompar.h"
//#include "video/mc6845.h"
//#include "screen.h"
#include "video/mc6845.h"
#include "screen.h"
class is48x_state : public driver_device
{
@ -20,11 +20,14 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_bcp(*this, "bcp")
, m_crtc(*this, "crtc")
{ }
void is482(machine_config &config);
private:
MC6845_UPDATE_ROW(update_row);
void mem_map(address_map &map);
void io_map(address_map &map);
void bcp_inst_map(address_map &map);
@ -32,8 +35,13 @@ private:
required_device<cpu_device> m_maincpu;
required_device<dp8344_device> m_bcp;
required_device<mc6845_device> m_crtc;
};
MC6845_UPDATE_ROW(is48x_state::update_row)
{
}
void is48x_state::mem_map(address_map &map)
{
map(0x00000, 0x07fff).ram(); // W24257S-70LL
@ -47,8 +55,8 @@ void is48x_state::mem_map(address_map &map)
void is48x_state::io_map(address_map &map)
{
map(0x8005, 0x8005).nopw();
//map(0x8080, 0x8080).w("crtc", FUNC(mc6845_device::address_w));
//map(0x8081, 0x8081).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x8080, 0x8080).w(m_crtc, FUNC(mc6845_device::address_w));
map(0x8081, 0x8081).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x8101, 0x8101).nopr();
map(0x8180, 0x8180).rw(m_bcp, FUNC(dp8344_device::cmd_r), FUNC(dp8344_device::cmd_w));
}
@ -78,7 +86,15 @@ void is48x_state::is482(machine_config &config)
EEPROM_28256(config, "eeprom"); // AT28C256
//HD6845S(config, "crtc", CRTC_CLOCK); // HD46505SP-1
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(60_MHz_XTAL / 2, 770, 0, 560, 532, 0, 475); // FIXME: vertical rate is supposed to be 75 Hz
screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
HD6845S(config, m_crtc, 60_MHz_XTAL / 28); // HD46505SP-1
m_crtc->set_char_width(14); // guess
m_crtc->set_screen("screen");
m_crtc->set_show_border_area(false);
m_crtc->set_update_row_callback(FUNC(is48x_state::update_row), this);
}
ROM_START(is482) // "IS-488-A" on case