// 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"
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")
{ }
UINT8 *m_char_rom;
required_shared_ptr<UINT16> m_gvram;
required_shared_ptr<UINT16> m_vram;
UINT8 m_crtc_vreg[0x100],m_crtc_index;
struct {
UINT16 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 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_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 fp6000_state::screen_update_fp6000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x,y;
int xi,yi;
UINT8 *gfx_rom = memregion("pcg")->base();
UINT32 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(space, offset, data);
}
WRITE8_MEMBER(fp6000_state::fp6000_6845_data_w)
{
m_crtc_vreg[m_crtc_index] = data;
m_crtc->register_w(space, offset, data);
}
static ADDRESS_MAP_START(fp6000_map, AS_PROGRAM, 16, fp6000_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00000,0xbffff) AM_RAM
AM_RANGE(0xc0000,0xdffff) AM_RAM AM_SHARE("gvram")//gvram
AM_RANGE(0xe0000,0xe0fff) AM_RAM AM_SHARE("vram")
AM_RANGE(0xe7000,0xe7fff) AM_READWRITE8(fp6000_pcg_r,fp6000_pcg_w,0xffff)
AM_RANGE(0xf0000,0xfffff) AM_ROM AM_REGION("ipl", 0)
ADDRESS_MAP_END
/* 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();
}
static ADDRESS_MAP_START(fp6000_io, AS_IO, 16, fp6000_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x08, 0x09) AM_READ(ex_board_r) // BIOS of some sort ...
AM_RANGE(0x0a, 0x0b) AM_READ_PORT("DSW") // installed RAM id?
AM_RANGE(0x10, 0x11) AM_READNOP
AM_RANGE(0x20, 0x23) AM_READWRITE8(fp6000_key_r,fp6000_key_w,0x00ff)
AM_RANGE(0x38, 0x39) AM_READ(pit_r) // pit?
AM_RANGE(0x70, 0x71) AM_WRITE8(fp6000_6845_address_w,0x00ff)
AM_RANGE(0x72, 0x73) AM_WRITE8(fp6000_6845_data_w,0x00ff)
AM_RANGE(0x74, 0x75) AM_READ(unk_r) //bit 6 busy flag
ADDRESS_MAP_END
/* 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( 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()
{
}
static MACHINE_CONFIG_START( fp6000, fp6000_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8086, 16000000/2)
MCFG_CPU_PROGRAM_MAP(fp6000_map)
MCFG_CPU_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")
MCFG_MC6845_ADD("crtc", H46505, "screen", 16000000/5) /* unknown clock, hand tuned to get ~60 fps */
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_PALETTE_ADD("palette", 8)
// MCFG_PALETTE_INIT(black_and_white)
MCFG_GFXDECODE_ADD("gfxdecode", "palette", 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 INIT COMPANY FULLNAME FLAGS */
COMP( 1985, fp6000, 0, 0, fp6000, fp6000, driver_device, 0, "Casio", "FP-6000", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)