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mame/src/mame/drivers/fp6000.cpp

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// license:BSD-3-Clause
// copyright-holders:Angelo Salese
/***************************************************************************
Casio FP-6000
preliminary driver by Angelo Salese
TODO:
- keyboard;
- fdc / cmt;
- gvram color pen is a rather crude guess (the layer is monochrome on
BASIC?);
- everything else
Debug trick for the keyboard:
- bp 0xfc93e, ip+=2 then define al = ASCII code
****************************************************************************/
#include "emu.h"
#include "cpu/i86/i86.h"
#include "video/mc6845.h"
#include "emupal.h"
#include "screen.h"
class fp6000_state : public driver_device
{
public:
fp6000_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_gvram(*this, "gvram"),
m_vram(*this, "vram"),
m_maincpu(*this, "maincpu"),
m_crtc(*this, "crtc"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette")
{ }
void fp6000(machine_config &config);
private:
uint8_t *m_char_rom;
required_shared_ptr<uint16_t> m_gvram;
required_shared_ptr<uint16_t> m_vram;
uint8_t m_crtc_vreg[0x100],m_crtc_index;
struct {
uint16_t cmd;
}m_key;
DECLARE_READ8_MEMBER(fp6000_pcg_r);
DECLARE_WRITE8_MEMBER(fp6000_pcg_w);
DECLARE_WRITE8_MEMBER(fp6000_6845_address_w);
DECLARE_WRITE8_MEMBER(fp6000_6845_data_w);
DECLARE_READ8_MEMBER(fp6000_key_r);
DECLARE_WRITE8_MEMBER(fp6000_key_w);
DECLARE_READ16_MEMBER(unk_r);
DECLARE_READ16_MEMBER(ex_board_r);
DECLARE_READ16_MEMBER(pit_r);
virtual void machine_start() override;
virtual void machine_reset() override;
virtual void video_start() override;
uint32_t screen_update_fp6000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
required_device<cpu_device> m_maincpu;
required_device<mc6845_device>m_crtc;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
void fp6000_io(address_map &map);
void fp6000_map(address_map &map);
};
void fp6000_state::video_start()
{
}
#define mc6845_h_char_total (m_crtc_vreg[0])
#define mc6845_h_display (m_crtc_vreg[1])
#define mc6845_h_sync_pos (m_crtc_vreg[2])
#define mc6845_sync_width (m_crtc_vreg[3])
#define mc6845_v_char_total (m_crtc_vreg[4])
#define mc6845_v_total_adj (m_crtc_vreg[5])
#define mc6845_v_display (m_crtc_vreg[6])
#define mc6845_v_sync_pos (m_crtc_vreg[7])
#define mc6845_mode_ctrl (m_crtc_vreg[8])
#define mc6845_tile_height (m_crtc_vreg[9]+1)
#define mc6845_cursor_y_start (m_crtc_vreg[0x0a])
#define mc6845_cursor_y_end (m_crtc_vreg[0x0b])
#define mc6845_start_addr (((m_crtc_vreg[0x0c]<<8) & 0x3f00) | (m_crtc_vreg[0x0d] & 0xff))
#define mc6845_cursor_addr (((m_crtc_vreg[0x0e]<<8) & 0x3f00) | (m_crtc_vreg[0x0f] & 0xff))
#define mc6845_light_pen_addr (((m_crtc_vreg[0x10]<<8) & 0x3f00) | (m_crtc_vreg[0x11] & 0xff))
#define mc6845_update_addr (((m_crtc_vreg[0x12]<<8) & 0x3f00) | (m_crtc_vreg[0x13] & 0xff))
uint32_t fp6000_state::screen_update_fp6000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x,y;
int xi,yi;
uint8_t *gfx_rom = memregion("pcg")->base();
uint32_t count;
count = 0;
for(y=0;y<400;y++)
{
for(x=0;x<640/4;x++)
{
for(xi=0;xi<4;xi++)
{
int dot = (m_gvram[count] >> (12-xi*4)) & 0xf;
if(y < 400 && x*4+xi < 640) /* TODO: safety check */
bitmap.pix16(y, x*4+xi) = m_palette->pen(dot);
}
count++;
}
}
for(y=0;y<mc6845_v_display;y++)
{
for(x=0;x<mc6845_h_display;x++)
{
int tile = m_vram[x+y*mc6845_h_display] & 0xff;
int color = (m_vram[x+y*mc6845_h_display] & 0x700) >> 8;
int pen;
for(yi=0;yi<mc6845_tile_height;yi++)
{
for(xi=0;xi<8;xi++)
{
pen = (gfx_rom[tile*16+yi] >> (7-xi) & 1) ? color : -1;
if(pen != -1)
if(y*mc6845_tile_height < 400 && x*8+xi < 640) /* TODO: safety check */
bitmap.pix16(y*mc6845_tile_height+yi, x*8+xi) = m_palette->pen(pen);
}
}
}
}
/* quick and dirty way to do the cursor */
for(yi=0;yi<mc6845_tile_height;yi++)
{
for(xi=0;xi<8;xi++)
{
if(mc6845_h_display)
{
x = mc6845_cursor_addr % mc6845_h_display;
y = mc6845_cursor_addr / mc6845_h_display;
bitmap.pix16(y*mc6845_tile_height+yi, x*8+xi) = m_palette->pen(7);
}
}
}
return 0;
}
READ8_MEMBER(fp6000_state::fp6000_pcg_r)
{
return m_char_rom[offset];
}
WRITE8_MEMBER(fp6000_state::fp6000_pcg_w)
{
m_char_rom[offset] = data;
m_gfxdecode->gfx(0)->mark_dirty(offset >> 4);
}
WRITE8_MEMBER(fp6000_state::fp6000_6845_address_w)
{
m_crtc_index = data;
m_crtc->address_w(data);
}
WRITE8_MEMBER(fp6000_state::fp6000_6845_data_w)
{
m_crtc_vreg[m_crtc_index] = data;
m_crtc->register_w(data);
}
void fp6000_state::fp6000_map(address_map &map)
{
map.unmap_value_high();
map(0x00000, 0xbffff).ram();
map(0xc0000, 0xdffff).ram().share("gvram");//gvram
map(0xe0000, 0xe0fff).ram().share("vram");
map(0xe7000, 0xe7fff).rw(FUNC(fp6000_state::fp6000_pcg_r), FUNC(fp6000_state::fp6000_pcg_w));
map(0xf0000, 0xfffff).rom().region("ipl", 0);
}
/* Hack until I understand what UART is this one ... */
READ8_MEMBER(fp6000_state::fp6000_key_r)
{
if(offset)
{
switch(m_key.cmd)
{
case 0x7e15: return 3;
case 0x1b15: return 1;
case 0x2415: return 0;
default: printf("%04x\n",m_key.cmd);
}
return 0;
}
return 0x40;
}
WRITE8_MEMBER(fp6000_state::fp6000_key_w)
{
if(offset)
m_key.cmd = (data & 0xff) | (m_key.cmd << 8);
else
m_key.cmd = (data << 8) | (m_key.cmd & 0xff);
}
READ16_MEMBER(fp6000_state::unk_r)
{
return 0x40;
}
READ16_MEMBER(fp6000_state::ex_board_r)
{
return 0xffff;
}
READ16_MEMBER(fp6000_state::pit_r)
{
return machine().rand();
}
void fp6000_state::fp6000_io(address_map &map)
{
map.unmap_value_high();
map(0x08, 0x09).r(FUNC(fp6000_state::ex_board_r)); // BIOS of some sort ...
map(0x0a, 0x0b).portr("DSW"); // installed RAM id?
map(0x10, 0x11).nopr();
map(0x20, 0x23).rw(FUNC(fp6000_state::fp6000_key_r), FUNC(fp6000_state::fp6000_key_w)).umask16(0x00ff);
map(0x38, 0x39).r(FUNC(fp6000_state::pit_r)); // pit?
map(0x70, 0x70).w(FUNC(fp6000_state::fp6000_6845_address_w));
map(0x72, 0x72).w(FUNC(fp6000_state::fp6000_6845_data_w));
map(0x74, 0x75).r(FUNC(fp6000_state::unk_r)); //bit 6 busy flag
}
/* Input ports */
static INPUT_PORTS_START( fp6000 )
PORT_START("DSW")
PORT_DIPNAME( 0x01, 0x00, "DSW" )
PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x04, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0xe0, 0x40, "Installed RAM banks" )
PORT_DIPSETTING( 0xe0, "0" )
PORT_DIPSETTING( 0xc0, "1" )
PORT_DIPSETTING( 0xa0, "2" )
PORT_DIPSETTING( 0x80, "3" )
PORT_DIPSETTING( 0x60, "4" )
PORT_DIPSETTING( 0x40, "5" )
PORT_DIPSETTING( 0x20, "6 (INVALID)" ) //exceeds 768KB limit (writes to gvram et al)
PORT_DIPSETTING( 0x00, "7 (INVALID)" )
INPUT_PORTS_END
static const gfx_layout fp6000_charlayout =
{
8, 16,
RGN_FRAC(1,1),
1,
{ 0 },
{ STEP8(0,1) },
{ STEP16(0,8) },
8*16
};
static GFXDECODE_START( gfx_fp6000 )
GFXDECODE_ENTRY( "pcg", 0x0000, fp6000_charlayout, 0, 1 )
GFXDECODE_END
void fp6000_state::machine_start()
{
m_char_rom = memregion("pcg")->base();
}
void fp6000_state::machine_reset()
{
}
MACHINE_CONFIG_START(fp6000_state::fp6000)
/* basic machine hardware */
MCFG_DEVICE_ADD("maincpu", I8086, 16000000/2)
MCFG_DEVICE_PROGRAM_MAP(fp6000_map)
MCFG_DEVICE_IO_MAP(fp6000_io)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(640, 480)
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
MCFG_SCREEN_UPDATE_DRIVER(fp6000_state, screen_update_fp6000)
MCFG_SCREEN_PALETTE("palette")
H46505(config, m_crtc, 16000000/5); /* unknown clock, hand tuned to get ~60 fps */
m_crtc->set_screen("screen");
m_crtc->set_show_border_area(false);
m_crtc->set_char_width(8);
MCFG_PALETTE_ADD("palette", 8)
// MCFG_PALETTE_INIT(black_and_white)
GFXDECODE(config, m_gfxdecode, m_palette, gfx_fp6000);
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( fp6000 )
ROM_REGION( 0x10000, "ipl", ROMREGION_ERASEFF )
ROM_LOAD( "ipl.rom", 0x0000, 0x10000, CRC(c72fe40a) SHA1(0e4c60dc27f6c7f461c4bc382b81602b3327a7a4))
ROM_REGION( 0x1000, "mcu", ROMREGION_ERASEFF )
ROM_LOAD( "mcu", 0x0000, 0x1000, NO_DUMP ) //unknown MCU type
ROM_REGION( 0x10000, "pcg", ROMREGION_ERASE00 )
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1985, fp6000, 0, 0, fp6000, fp6000, fp6000_state, empty_init, "Casio", "FP-6000", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
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