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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Seiko-Epson SED1330 LCD Controller emulation
**********************************************************************/
#include "emu.h"
#include "sed1330.h"
//#define VERBOSE 1
#include "logmacro.h"
//**************************************************************************
// MACROS / CONSTANTS
//**************************************************************************
#define INSTRUCTION_SYSTEM_SET 0x40
#define INSTRUCTION_SLEEP_IN 0x53 // unimplemented
#define INSTRUCTION_DISP_ON 0x59
#define INSTRUCTION_DISP_OFF 0x58
#define INSTRUCTION_SCROLL 0x44
#define INSTRUCTION_CSRFORM 0x5d
#define INSTRUCTION_CGRAM_ADR 0x5c
#define INSTRUCTION_CSRDIR_RIGHT 0x4c
#define INSTRUCTION_CSRDIR_LEFT 0x4d
#define INSTRUCTION_CSRDIR_UP 0x4e
#define INSTRUCTION_CSRDIR_DOWN 0x4f
#define INSTRUCTION_HDOT_SCR 0x5a
#define INSTRUCTION_OVLAY 0x5b
#define INSTRUCTION_CSRW 0x46
#define INSTRUCTION_CSRR 0x47 // unimplemented
#define INSTRUCTION_MWRITE 0x42
#define INSTRUCTION_MREAD 0x43 // unimplemented
#define CSRDIR_RIGHT 0x00
#define CSRDIR_LEFT 0x01
#define CSRDIR_UP 0x02
#define CSRDIR_DOWN 0x03
#define MX_OR 0x00
#define MX_XOR 0x01 // unimplemented
#define MX_AND 0x02 // unimplemented
#define MX_PRIORITY_OR 0x03 // unimplemented
#define FC_OFF 0x00
#define FC_SOLID 0x01 // unimplemented
#define FC_FLASH_32 0x02 // unimplemented
#define FC_FLASH_64 0x03 // unimplemented
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
DEFINE_DEVICE_TYPE(SED1330, sed1330_device, "sed1330", "Epson SED1330")
// default address map
void sed1330_device::sed1330(address_map &map)
{
map(0x0000, 0xffff).ram();
}
// internal character generator ROM
ROM_START( sed1330 )
ROM_REGION( 0x5c0, "gfx1", 0 ) // internal chargen ROM
ROM_LOAD( "sed1330.bin", 0x000, 0x5c0, NO_DUMP )
ROM_END
//**************************************************************************
// INLINE HELPERS
//**************************************************************************
//-------------------------------------------------
// readbyte - read a byte at the given address
//-------------------------------------------------
inline uint8_t sed1330_device::readbyte(offs_t address)
{
return space().read_byte(address);
}
//-------------------------------------------------
// writebyte - write a byte at the given address
//-------------------------------------------------
inline void sed1330_device::writebyte(offs_t address, uint8_t data)
{
space().write_byte(address, data);
}
//-------------------------------------------------
// increment_csr - increment cursor address
//-------------------------------------------------
inline void sed1330_device::increment_csr()
{
switch (m_cd)
{
case CSRDIR_RIGHT:
m_csr++;
break;
case CSRDIR_LEFT:
m_csr--;
break;
case CSRDIR_UP:
m_csr -= m_ap;
break;
case CSRDIR_DOWN:
m_csr += m_ap;
break;
}
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// sed1330_device - constructor
//-------------------------------------------------
sed1330_device::sed1330_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, SED1330, tag, owner, clock),
device_memory_interface(mconfig, *this),
device_video_interface(mconfig, *this),
m_bf(0),
m_space_config("videoram", ENDIANNESS_LITTLE, 8, 16, 0, address_map_constructor(), address_map_constructor(FUNC(sed1330_device::sed1330), this))
{
}
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const tiny_rom_entry *sed1330_device::device_rom_region() const
{
return ROM_NAME( sed1330 );
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void sed1330_device::device_start()
{
// register for state saving
save_item(NAME(m_bf));
save_item(NAME(m_ir));
save_item(NAME(m_dor));
save_item(NAME(m_pbc));
save_item(NAME(m_d));
save_item(NAME(m_sleep));
save_item(NAME(m_sag));
save_item(NAME(m_m0));
save_item(NAME(m_m1));
save_item(NAME(m_m2));
save_item(NAME(m_ws));
save_item(NAME(m_iv));
save_item(NAME(m_wf));
save_item(NAME(m_fx));
save_item(NAME(m_fy));
save_item(NAME(m_cr));
save_item(NAME(m_tcr));
save_item(NAME(m_lf));
save_item(NAME(m_ap));
save_item(NAME(m_sad1));
save_item(NAME(m_sad2));
save_item(NAME(m_sad3));
save_item(NAME(m_sad4));
save_item(NAME(m_sl1));
save_item(NAME(m_sl2));
save_item(NAME(m_hdotscr));
save_item(NAME(m_csr));
save_item(NAME(m_cd));
save_item(NAME(m_crx));
save_item(NAME(m_cry));
save_item(NAME(m_cm));
save_item(NAME(m_fc));
save_item(NAME(m_fp));
save_item(NAME(m_mx));
save_item(NAME(m_dm));
save_item(NAME(m_ov));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void sed1330_device::device_reset()
{
}
//-------------------------------------------------
// memory_space_config - return a description of
// any address spaces owned by this device
//-------------------------------------------------
device_memory_interface::space_config_vector sed1330_device::memory_space_config() const
{
return space_config_vector {
std::make_pair(0, &m_space_config)
};
}
//-------------------------------------------------
// status_r -
//-------------------------------------------------
READ8_MEMBER( sed1330_device::status_r )
{
LOG("SED1330 Status Read: %s\n", m_bf ? "busy" : "ready");
return m_bf << 6;
}
//-------------------------------------------------
// command_w -
//-------------------------------------------------
WRITE8_MEMBER( sed1330_device::command_w )
{
m_ir = data;
m_pbc = 0;
switch (m_ir)
{
#if 0
case INSTRUCTION_SLEEP_IN:
break;
#endif
case INSTRUCTION_CSRDIR_RIGHT:
case INSTRUCTION_CSRDIR_LEFT:
case INSTRUCTION_CSRDIR_UP:
case INSTRUCTION_CSRDIR_DOWN:
m_cd = data & 0x03;
switch (m_cd)
{
case CSRDIR_RIGHT: LOG("SED1330 Cursor Direction: Right\n"); break;
case CSRDIR_LEFT: LOG("SED1330 Cursor Direction: Left\n"); break;
case CSRDIR_UP: LOG("SED1330 Cursor Direction: Up\n"); break;
case CSRDIR_DOWN: LOG("SED1330 Cursor Direction: Down\n"); break;
}
break;
}
}
//-------------------------------------------------
// data_r -
//-------------------------------------------------
READ8_MEMBER( sed1330_device::data_r )
{
uint8_t data = readbyte(m_csr);
LOG("SED1330 Memory Read %02x from %04x\n", data, m_csr);
increment_csr();
return data;
}
//-------------------------------------------------
// data_w -
//-------------------------------------------------
WRITE8_MEMBER( sed1330_device::data_w )
{
switch (m_ir)
{
case INSTRUCTION_SYSTEM_SET:
switch (m_pbc)
{
case 0:
m_m0 = BIT(data, 0);
m_m1 = BIT(data, 1);
m_m2 = BIT(data, 2);
m_ws = BIT(data, 3);
m_iv = BIT(data, 5);
LOG("SED1330 %s CG ROM\n", BIT(data, 0) ? "External" : "Internal");
LOG("SED1330 D6 Correction: %s\n", BIT(data, 1) ? "enabled" : "disabled");
LOG("SED1330 Character Height: %u\n", BIT(data, 2) ? 16 : 8);
LOG("SED1330 %s Panel Drive\n", BIT(data, 3) ? "Dual" : "Single");
LOG("SED1330 Screen Top-Line Correction: %s\n", BIT(data, 5) ? "disabled" : "enabled");
break;
case 1:
m_fx = (data & 0x07) + 1;
m_wf = BIT(data, 7);
LOG("SED1330 Horizontal Character Size: %u\n", m_fx);
LOG("SED1330 %s AC Drive\n", BIT(data, 7) ? "2-frame" : "16-line");
break;
case 2:
m_fy = (data & 0x0f) + 1;
LOG("SED1330 Vertical Character Size: %u\n", m_fy);
break;
case 3:
m_cr = data + 1;
LOG("SED1330 Visible Characters Per Line: %u\n", m_cr);
break;
case 4:
m_tcr = data + 1;
LOG("SED1330 Total Characters Per Line: %u\n", m_tcr);
break;
case 5:
m_lf = data + 1;
LOG("SED1330 Frame Height: %u\n", m_lf);
break;
case 6:
m_ap = (m_ap & 0xff00) | data;
break;
case 7:
m_ap = (data << 8) | (m_ap & 0xff);
LOG("SED1330 Virtual Screen Width: %u\n", m_ap);
break;
default:
logerror("SED1330 Invalid parameter byte %02x\n", data);
}
break;
case INSTRUCTION_DISP_ON:
case INSTRUCTION_DISP_OFF:
m_d = BIT(data, 0);
m_fc = data & 0x03;
m_fp = data >> 2;
LOG("SED1330 Display: %s\n", BIT(data, 0) ? "enabled" : "disabled");
switch (m_fc)
{
case FC_OFF: LOG("SED1330 Cursor: disabled\n"); break;
case FC_SOLID: LOG("SED1330 Cursor: solid\n"); break;
case FC_FLASH_32: LOG("SED1330 Cursor: fFR/32\n"); break;
case FC_FLASH_64: LOG("SED1330 Cursor: fFR/64\n"); break;
}
switch (m_fp & 0x03)
{
case FC_OFF: LOG("SED1330 Display Page 1: disabled\n"); break;
case FC_SOLID: LOG("SED1330 Display Page 1: enabled\n"); break;
case FC_FLASH_32: LOG("SED1330 Display Page 1: flash fFR/32\n"); break;
case FC_FLASH_64: LOG("SED1330 Display Page 1: flash fFR/64\n"); break;
}
switch ((m_fp >> 2) & 0x03)
{
case FC_OFF: LOG("SED1330 Display Page 2/4: disabled\n"); break;
case FC_SOLID: LOG("SED1330 Display Page 2/4: enabled\n"); break;
case FC_FLASH_32: LOG("SED1330 Display Page 2/4: flash fFR/32\n"); break;
case FC_FLASH_64: LOG("SED1330 Display Page 2/4: flash fFR/64\n"); break;
}
switch ((m_fp >> 4) & 0x03)
{
case FC_OFF: LOG("SED1330 Display Page 3: disabled\n"); break;
case FC_SOLID: LOG("SED1330 Display Page 3: enabled\n"); break;
case FC_FLASH_32: LOG("SED1330 Display Page 3: flash fFR/32\n"); break;
case FC_FLASH_64: LOG("SED1330 Display Page 3: flash fFR/64\n"); break;
}
break;
case INSTRUCTION_SCROLL:
switch (m_pbc)
{
case 0:
m_sad1 = (m_sad1 & 0xff00) | data;
break;
case 1:
m_sad1 = (data << 8) | (m_sad1 & 0xff);
LOG("SED1330 Display Page 1 Start Address: %04x\n", m_sad1);
break;
case 2:
m_sl1 = data + 1;
LOG("SED1330 Display Block 1 Screen Lines: %u\n", m_sl1);
break;
case 3:
m_sad2 = (m_sad2 & 0xff00) | data;
break;
case 4:
m_sad2 = (data << 8) | (m_sad2 & 0xff);
LOG("SED1330 Display Page 2 Start Address: %04x\n", m_sad2);
break;
case 5:
m_sl2 = data + 1;
LOG("SED1330 Display Block 2 Screen Lines: %u\n", m_sl2);
break;
case 6:
m_sad3 = (m_sad3 & 0xff00) | data;
break;
case 7:
m_sad3 = (data << 8) | (m_sad3 & 0xff);
LOG("SED1330 Display Page 3 Start Address: %04x\n", m_sad3);
break;
case 8:
m_sad4 = (m_sad4 & 0xff00) | data;
break;
case 9:
m_sad4 = (data << 8) | (m_sad4 & 0xff);
LOG("SED1330 Display Page 4 Start Address: %04x\n", m_sad4);
break;
default:
logerror("SED1330 Invalid parameter byte %02x\n", data);
}
break;
case INSTRUCTION_CSRFORM:
switch (m_pbc)
{
case 0:
m_crx = (data & 0x0f) + 1;
LOG("SED1330 Horizontal Cursor Size: %u\n", m_crx);
break;
case 1:
m_cry = (data & 0x0f) + 1;
m_cm = BIT(data, 7);
LOG("SED1330 Vertical Cursor Location: %u\n", m_cry);
LOG("SED1330 Cursor Shape: %s\n", BIT(data, 7) ? "Block" : "Underscore");
break;
default:
logerror("SED1330 Invalid parameter byte %02x\n", data);
}
break;
case INSTRUCTION_CGRAM_ADR:
switch (m_pbc)
{
case 0:
m_sag = (m_sag & 0xff00) | data;
break;
case 1:
m_sag = (data << 8) | (m_sag & 0xff);
LOG("SED1330 Character Generator RAM Start Address: %04x\n", m_sag);
break;
default:
logerror("SED1330 Invalid parameter byte %02x\n", data);
}
break;
case INSTRUCTION_HDOT_SCR:
m_hdotscr = data & 0x07;
LOG("SED1330 Horizontal Dot Scroll: %u\n", m_hdotscr);
break;
case INSTRUCTION_OVLAY:
m_mx = data & 0x03;
m_dm = (data >> 2) & 0x03;
m_ov = BIT(data, 4);
switch (m_mx)
{
case MX_OR: LOG("SED1330 Display Composition Method: OR\n"); break;
case MX_XOR: LOG("SED1330 Display Composition Method: Exclusive-OR\n"); break;
case MX_AND: LOG("SED1330 Display Composition Method: AND\n"); break;
case MX_PRIORITY_OR: LOG("SED1330 Display Composition Method: Priority-OR\n"); break;
}
LOG("SED1330 Display Page 1 Mode: %s\n", BIT(data, 2) ? "Graphics" : "Text");
LOG("SED1330 Display Page 3 Mode: %s\n", BIT(data, 3) ? "Graphics" : "Text");
LOG("SED1330 Display Composition Layers: %u\n", BIT(data, 4) ? 3 : 2);
break;
case INSTRUCTION_CSRW:
switch (m_pbc)
{
case 0:
m_csr = (m_csr & 0xff00) | data;
break;
case 1:
m_csr = (data << 8) | (m_csr & 0xff);
LOG("SED1330 Cursor Address %04x\n", m_csr);
break;
default:
logerror("SED1330 Invalid parameter byte %02x\n", data);
}
break;
#if 0
case INSTRUCTION_CSRR:
break;
#endif
case INSTRUCTION_MWRITE:
LOG("SED1330 Memory Write %02x to %04x (row %u col %u line %u)\n", data, m_csr, m_csr/80/8, m_csr%80, m_csr/80);
writebyte(m_csr, data);
increment_csr();
break;
#if 0
case INSTRUCTION_MREAD:
break;
#endif
default:
logerror("SED1330 Unsupported instruction %02x\n", m_ir);
}
m_pbc++;
}
//-------------------------------------------------
// draw_text_scanline -
//-------------------------------------------------
void sed1330_device::draw_text_scanline(bitmap_ind16 &bitmap, const rectangle &cliprect, int y, uint16_t va)
{
int sx, x;
for (sx = 0; sx < m_cr; sx++)
{
if ((va + sx) == m_csr)
{
if (m_fc == FC_OFF) continue;
if (m_cm)
{
// block cursor
if (y % m_fy < m_cry)
{
for (x = 0; x < m_crx; x++)
{
bitmap.pix16(y, (sx * m_fx) + x) = 1;
}
}
}
else
{
// underscore cursor
if (y % m_fy == m_cry)
{
for (x = 0; x < m_crx; x++)
{
bitmap.pix16(y, (sx * m_fx) + x) = 1;
}
}
}
}
}
}
//-------------------------------------------------
// draw_graphics_scanline -
//-------------------------------------------------
void sed1330_device::draw_graphics_scanline(bitmap_ind16 &bitmap, const rectangle &cliprect, int y, uint16_t va)
{
int sx, x;
for (sx = 0; sx < m_cr; sx++)
{
uint8_t data = readbyte(va++);
for (x = 0; x < m_fx; x++)
{
bitmap.pix16(y, (sx * m_fx) + x) = BIT(data, 7);
data <<= 1;
}
}
}
//-------------------------------------------------
// update_graphics -
//-------------------------------------------------
void sed1330_device::update_graphics(bitmap_ind16 &bitmap, const rectangle &cliprect)
{
}
//-------------------------------------------------
// update_text -
//-------------------------------------------------
void sed1330_device::update_text(bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int y;
if (m_ws)
{
for (y = 0; y < m_sl1; y++)
{
uint16_t sad1 = m_sad1 + ((y / m_fy) * m_ap);
uint16_t sad2 = m_sad2 + (y * m_ap);
uint16_t sad3 = m_sad3 + ((y / m_fy) * m_ap);
uint16_t sad4 = m_sad4 + (y * m_ap);
// draw graphics display page 2 scanline
draw_graphics_scanline(bitmap, cliprect, y, sad2);
// draw text display page 1 scanline
draw_text_scanline(bitmap, cliprect, y, sad1);
// draw graphics display page 4 scanline
draw_graphics_scanline(bitmap, cliprect, y + m_sl1, sad4);
// draw text display page 3 scanline
draw_text_scanline(bitmap, cliprect, y + m_sl1, sad3);
}
}
}
//-------------------------------------------------
// screen_update -
//-------------------------------------------------
uint32_t sed1330_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if (m_d)
{
if (m_dm)
{
update_graphics(bitmap, cliprect);
}
else
{
update_text(bitmap, cliprect);
}
}
return 0;
}
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