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falco5220: Various improvements

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- Add RAM banking
- Crude screen rendering, set amber screen color
- Add RAM based gfxdecode
- Identify keyboard addresses
This commit is contained in:
Dirk Best 2019-07-20 11:13:43 +02:00
parent 7787a27417
commit 940d6b61db
1 changed files with 91 additions and 4 deletions
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95
src/mame/drivers/falco5220.cpp
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@ -27,9 +27,11 @@
#include "emu.h"
//#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "machine/bankdev.h"
#include "machine/nvram.h"
#include "machine/z80ctc.h"
#include "machine/z80sio.h"
#include "emupal.h"
#include "screen.h"
class falco5220_state : public driver_device
@ -38,8 +40,12 @@ public:
falco5220_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_rambank(*this, "rambank")
, m_screen(*this, "screen")
, m_rombank(*this, "rombank")
, m_ram(*this, "ram")
, m_charram(*this, "charram")
, m_5a(0)
{
}
@ -53,40 +59,94 @@ private:
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void rombank_w(u8 data);
void rambank_w(u8 data);
void unk5a_w(u8 data);
void mem_map(address_map &map);
void bank_map(address_map &map);
void io_map(address_map &map);
required_device<z80_device> m_maincpu;
required_device<address_map_bank_device> m_rambank;
required_device<screen_device> m_screen;
required_memory_bank m_rombank;
//required_shared_ptr<u8> m_cram; // 1x or 2x NEC D43256C-10L
//required_shared_ptr<u8> m_aram; // 1x or 2x NEC D43256C-10L
required_shared_ptr<u8> m_ram;
required_shared_ptr<u8> m_charram;
u8 m_5a;
};
u32 falco5220_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
offs_t start = m_5a ? 0x0000 : 0x2000;
for (int col = 0; col < 25; col++)
{
for (int row = 0; row < 80; row++)
{
u8 code = m_ram[start + col * 80 + row];
u8 attr = m_ram[start + 0x1000 + col * 80 + row];
for (int y = 0; y < 16; y++)
{
u8 gfx = m_charram[code << 4 | y];
// underline
if (BIT(attr, 0) && y == 15)
gfx = 0xff;
for (int x = 0; x < 8; x++)
bitmap.pix32(col*16 + y, row*8 + x) = BIT(gfx, x) ? rgb_t::white() : rgb_t::black();
}
}
}
return 0;
}
void falco5220_state::rambank_w(u8 data)
{
if (data < 9)
m_rambank->set_bank(data);
else
logerror("rambank_w: %02x\n", data);
}
void falco5220_state::rombank_w(u8 data)
{
m_rombank->set_entry(data & 3);
}
void falco5220_state::unk5a_w(u8 data)
{
logerror("5a = %02x\n", data);
m_5a = data;
}
void falco5220_state::mem_map(address_map &map)
{
map(0x0000, 0x7fff).rom().region("roms", 0);
map(0x8000, 0xbfff).bankr("rombank");
map(0xc000, 0xdfff).ram().share("nvram");
map(0xe000, 0xffff).ram();
map(0xe000, 0xffff).m(m_rambank, FUNC(address_map_bank_device::amap8));
}
void falco5220_state::bank_map(address_map &map)
{
map(0x00000, 0x0ffff).ram().share("ram"); // 2x NEC D43256C-10L? (5220s only has 2x HY6264P-10)
map(0x10000, 0x11fff).ram().share("charram"); // CXK5864AP-10L / HY6264LP-12?
}
void falco5220_state::io_map(address_map &map)
{
map.global_mask(0xff);
map(0x00, 0x00).w(FUNC(falco5220_state::rombank_w));
// map(0x50, 0x50).r // keyboard data
// map(0x51, 0x51).r // keyboard status
map(0x52, 0x52).w(FUNC(falco5220_state::rambank_w));
// map(0x54, 0x54).w // vram address (low)?
// map(0x55, 0x55).w // vram address (high)?
map(0x5a, 0x5a).w(FUNC(falco5220_state::unk5a_w)); // 5220s only?
map(0x60, 0x63).rw("sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w));
map(0x70, 0x73).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write));
map(0x88, 0x8b).nopw(); // second SIO?
@ -101,11 +161,27 @@ void falco5220_state::machine_start()
void falco5220_state::machine_reset()
{
m_rombank->set_entry(0);
m_rambank->set_bank(0);
}
static INPUT_PORTS_START(falco5220)
INPUT_PORTS_END
static const gfx_layout char_layout =
{
8,16,
512,
1,
{ 0 },
{ 7, 6, 5, 4, 3, 2, 1, 0 },
{ STEP16(0, 8) },
8*16
};
static GFXDECODE_START(chars)
GFXDECODE_RAM("charram", 0, char_layout, 0, 1)
GFXDECODE_END
static const z80_daisy_config daisy_chain[] =
{
{ "ctc" },
@ -120,6 +196,12 @@ void falco5220_state::falco5220(machine_config &config)
m_maincpu->set_addrmap(AS_IO, &falco5220_state::io_map);
m_maincpu->set_daisy_config(daisy_chain);
ADDRESS_MAP_BANK(config, m_rambank);
m_rambank->set_map(&falco5220_state::bank_map);
m_rambank->set_data_width(8);
m_rambank->set_addr_width(17);
m_rambank->set_stride(0x2000);
NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); // CXK5864AP-10L + battery
z80ctc_device &ctc(Z80CTC(config, "ctc", 12.288_MHz_XTAL / 2)); // Z0843006PSC
@ -131,8 +213,13 @@ void falco5220_state::falco5220(machine_config &config)
sio.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_color(rgb_t::amber());
screen.set_raw(37.98_MHz_XTAL, 1500, 0, 1320, 422, 0, 400); // 25.32 kHz/60 Hz confirmed
screen.set_screen_update(FUNC(falco5220_state::screen_update));
PALETTE(config, "palette", palette_device::MONOCHROME_HIGHLIGHT);
GFXDECODE(config, "gfxdecode", "palette", chars);
}
ROM_START(falco5220e)