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mu5: Add the lc7985nd and the lcd [O. Galibert]
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‎scripts/src/video.lua‎

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@@ -603,6 +603,18 @@ if (VIDEOS["LC7582"]~=null) then
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}
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end
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--------------------------------------------------
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--
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--@src/devices/video/lc7985.h,VIDEOS["LC7985"] = true
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--------------------------------------------------
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if (VIDEOS["LC7985"]~=null) then
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files {
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MAME_DIR .. "src/devices/video/lc7985.cpp",
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MAME_DIR .. "src/devices/video/lc7985.h",
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}
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end
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--------------------------------------------------
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--
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--@src/devices/video/m50458.h,VIDEOS["M50458"] = true

‎scripts/target/mame/arcade.lua‎

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@@ -336,6 +336,7 @@ VIDEOS["I4100"] = true
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VIDEOS["I8275"] = true
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VIDEOS["JANGOU_BLITTER"] = true
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--VIDEOS["LC7582"] = true
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--VIDEOS["LC7985"] = true
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VIDEOS["M50458"] = true
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VIDEOS["MB90082"] = true
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VIDEOS["MB_VCU"] = true

‎scripts/target/mame/mess.lua‎

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@@ -366,6 +366,7 @@ VIDEOS["I82730"] = true
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VIDEOS["I8275"] = true
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VIDEOS["IMS_CVC"] = true
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VIDEOS["LC7582"] = true
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VIDEOS["LC7985"] = true
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--VIDEOS["M50458"] = true
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--VIDEOS["MB90082"] = true
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--VIDEOS["MB_VCU"] = true

‎src/devices/video/lc7985.cpp‎

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// license:BSD-3-Clause
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// copyright-holders:Olivier Galibert
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/***************************************************************************
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Sanyo LC7985NA/LC7985ND LCD controller
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***************************************************************************/
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#include "emu.h"
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#include "lc7985.h"
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DEFINE_DEVICE_TYPE(LC7985, lc7985_device, "lc7985", "Sanyo LC7985NA/LC7985ND LCD controller")
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ROM_START( lc7985 )
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ROM_REGION( 0x1000, "cgrom", 0 )
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ROM_LOAD( "lc7985.bin", 0x0000, 0x1000, BAD_DUMP CRC(fdc64160) SHA1(8e6b54f8fb7c4c15aab2e65dd1a44729b97423b1)) // from page 12 of the LC7985D datasheet
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ROM_END
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lc7985_device::lc7985_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, LC7985, tag, owner, clock),
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m_cgrom_region(*this, DEVICE_SELF)
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{
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}
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const tiny_rom_entry *lc7985_device::device_rom_region() const
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{
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return ROM_NAME(lc7985);
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}
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void lc7985_device::device_start()
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{
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m_cgrom = m_cgrom_region.found() ? m_cgrom_region : memregion("cgrom")->base();
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m_busy_timer = timer_alloc(0);
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save_item(NAME(m_ddram));
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save_item(NAME(m_cgram));
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save_item(NAME(m_busy_flag));
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save_item(NAME(m_ddac));
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save_item(NAME(m_cgac));
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save_item(NAME(m_shift));
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save_item(NAME(m_access_ddram));
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save_item(NAME(m_function));
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save_item(NAME(m_cds));
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}
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void lc7985_device::device_reset()
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{
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memset(m_ddram, 0x20, sizeof(m_ddram)); // filled with SPACE char
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memset(m_cgram, 0, sizeof(m_cgram));
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m_ddac = 0x00;
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m_cgac = 0x00;
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m_shift = 0x00;
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m_access_ddram = false;
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m_function = 0x00;
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m_cds = 0x00;
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m_display = 0x00;
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m_entry = 0x02;
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busy(attotime::from_msec(10));
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}
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void lc7985_device::busy(attotime time)
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{
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m_busy_flag = true;
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m_busy_timer->adjust(time);
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}
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void lc7985_device::device_timer(emu_timer &, device_timer_id, int, void *)
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{
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m_busy_flag = false;
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}
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void lc7985_device::inc_ddac()
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{
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if(m_function & 0x08) { // 2 lines
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if(m_ddac == 39)
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m_ddac = 64;
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else if(m_ddac == 64+39)
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m_ddac = 0;
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else
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m_ddac++;
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} else {
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if(m_ddac == 79)
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m_ddac = 0;
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else
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m_ddac++;
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}
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}
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void lc7985_device::dec_ddac()
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{
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if(m_function & 0x08) { // 2 lines
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if(m_ddac == 64)
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m_ddac = 39;
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else if(m_ddac == 0)
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m_ddac = 64+39;
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else
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m_ddac--;
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} else {
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if(m_ddac == 0)
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m_ddac = 79;
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else
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m_ddac--;
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}
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}
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void lc7985_device::shift_left()
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{
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if(m_shift == 79)
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m_shift = 0;
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else
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m_shift++;
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}
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void lc7985_device::shift_right()
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{
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if(m_shift == 0)
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m_shift = 79;
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else
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m_shift--;
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}
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void lc7985_device::ir_w(u8 data)
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{
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if(m_busy_flag)
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return;
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if(data & 0x80) {
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// Set DDRAM address
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m_ddac = data & 0x7f;
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m_access_ddram = true;
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busy(attotime::from_usec(40));
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} else if(data & 0x40) {
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// Set CGRAM address
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m_cgac = data & 0x3f;
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m_access_ddram = false;
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busy(attotime::from_usec(40));
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} else if(data & 0x20) {
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// Set Function
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m_function = data;
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busy(attotime::from_usec(40));
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} else if(data & 0x10) {
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// Cursor/Display Shift
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m_access_ddram = true;
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switch((data >> 2) & 3) {
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case 0: dec_ddac(); break;
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case 1: inc_ddac(); break;
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case 2: shift_left(); break;
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case 3: shift_right(); break;
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}
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busy(attotime::from_usec(40));
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} else if(data & 0x08) {
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// Display On/Off
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m_display = data;
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busy(attotime::from_usec(40));
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} else if(data & 0x04) {
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// Set Entry Mode
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m_entry = data;
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busy(attotime::from_usec(40));
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} else if(data & 0x02) {
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// Cursor home
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m_ddac = 0;
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m_shift = 0;
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m_access_ddram = true;
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busy(attotime::from_usec(16400));
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} else if(data & 0x01) {
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// Display clear
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memset(m_ddram, 0x20, sizeof(m_ddram));
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m_ddac = 0x00;
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m_entry |= 0x02;
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busy(attotime::from_usec(16400));
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}
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}
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u8 lc7985_device::status_r()
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{
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return (m_access_ddram ? m_ddac : m_cgac) | (m_busy_flag ? 0x80 : 0x00);
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}
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void lc7985_device::dr_w(u8 data)
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{
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if(m_access_ddram) {
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m_ddram[(m_function & 0x08) && m_ddac >= 64 ? m_ddac - (64-40) : m_ddac] = data;
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switch(m_entry & 0x03) {
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case 0: dec_ddac(); break;
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case 1: dec_ddac(); shift_right(); break;
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case 2: inc_ddac(); break;
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case 3: inc_ddac(); shift_left(); break;
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}
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} else {
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m_cgram[m_cgac] = data;
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if(m_entry & 0x02)
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m_cgac = (m_cgac + 1) & 0x3f;
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else
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m_cgac = (m_cgac - 1) & 0x3f;
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}
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}
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u8 lc7985_device::dr_r()
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{
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u8 res;
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if(m_access_ddram) {
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res = m_ddram[(m_function & 0x08) && m_ddac >= 64 ? m_ddac - (64-40) : m_ddac];
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if(m_entry & 0x02)
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inc_ddac();
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else
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dec_ddac();
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} else {
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res = m_cgram[m_cgac];
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if(m_entry & 0x02)
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m_cgac = (m_cgac + 1) & 0x3f;
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else
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m_cgac = (m_cgac - 1) & 0x3f;
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}
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return res;
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}
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const u8 *lc7985_device::render()
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{
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memset(m_render_buffer, 0, sizeof(m_render_buffer));
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if(!(m_display & 0x04))
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return m_render_buffer;
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if(m_function & 0x08) {
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for(int y = 0; y != 2; y++) {
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for(int x = 0; x != 40; x ++) {
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u8 c = m_ddram[((x + 80 - m_shift) % 40) + 40*y];
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const u8 *src = c < 32 ? m_cgram + 8*(c & 7) : m_cgrom + 16 * c;
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u8 *dest = m_render_buffer + 8 * y + 16 * x;
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for(int z = 0; z != 8; z ++)
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*dest++ = *src++ & 0x1f;
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}
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}
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if(m_display & 0x03) {
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int cx = ((m_ddac & 0x3f) + 80 - m_shift) % 80;
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u8 *dest = m_render_buffer + (m_ddac >= 0x40 ? 8 : 0) + 16*cx;
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if(m_display & 0x02)
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dest[7] = 0x1f;
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if(m_display & 0x01) {
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bool on = int(machine().time().as_double() / 0.409) & 1;
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if(on)
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for(int z = 0; z != 8; z ++)
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*dest++ = 0x1f;
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}
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}
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} else if(m_function & 0x04) {
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for(int x = 0; x != 80; x ++) {
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u8 c = m_ddram[(x + 80 - m_shift) % 80];
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const u8 *src = c < 32 ? m_cgram + 8*(c & 6) : m_cgrom + 16 * c;
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u8 *dest = m_render_buffer + 16 * x;
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for(int z = 0; z != 11; z ++)
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*dest++ = *src++ & 0x1f;
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}
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if(m_display & 0x03) {
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int cx = (m_ddac + 80 - m_shift) % 80;
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u8 *dest = m_render_buffer + 16*cx;
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if(m_display & 0x02)
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dest[10] = 0x1f;
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if(m_display & 0x01) {
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bool on = int(machine().time().as_double() / 0.409) & 1;
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if(on)
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for(int z = 0; z != 11; z ++)
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*dest++ = 0x1f;
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}
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}
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} else {
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for(int x = 0; x != 80; x ++) {
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u8 c = m_ddram[(x + 80 - m_shift) % 80];
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const u8 *src = c < 32 ? m_cgram + 8*(c & 7) : m_cgrom + 16 * c;
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u8 *dest = m_render_buffer + 16 * x;
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for(int z = 0; z != 8; z ++)
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*dest++ = *src++ & 0x1f;
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}
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if(m_display & 0x03) {
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int cx = (m_ddac + 80 - m_shift) % 80;
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u8 *dest = m_render_buffer + 16*cx;
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if(m_display & 0x02)
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dest[7] = 0x1f;
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if(m_display & 0x01) {
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bool on = int(machine().time().as_double() / 0.409) & 1;
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if(on)
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for(int z = 0; z != 8; z ++)
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*dest++ = 0x1f;
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}
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}
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}
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return m_render_buffer;
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}
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‎src/devices/video/lc7985.h‎

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// license:BSD-3-Clause
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// copyright-holders:Olivier Galibert
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/***************************************************************************
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Sanyo LC7985NA/LC7985ND LCD controller
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***************************************************************************/
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#ifndef MAME_VIDEO_LC7985_H
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#define MAME_VIDEO_LC7985_H
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#pragma once
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class lc7985_device : public device_t
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{
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public:
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lc7985_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
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void ir_w(u8 data);
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u8 status_r();
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void dr_w(u8 data);
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u8 dr_r();
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// 5 bits used per byte, blocks of 16 lines, 80 blocks
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const u8 *render();
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protected:
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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virtual const tiny_rom_entry *device_rom_region() const override;
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private:
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optional_region_ptr<u8> m_cgrom_region; // internal chargen ROM
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u8 m_render_buffer[16*40];
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u8 m_ddram[80];
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u8 m_cgram[64];
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const u8 *m_cgrom;
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emu_timer *m_busy_timer;
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u8 m_ddac;
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u8 m_cgac;
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u8 m_shift;
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u8 m_function;
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u8 m_cds;
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u8 m_display;
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u8 m_entry;
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bool m_busy_flag;
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bool m_access_ddram;
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void inc_ddac();
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void dec_ddac();
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void shift_left();
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void shift_right();
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void busy(attotime tm);
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};
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DECLARE_DEVICE_TYPE(LC7985, lc7985_device)
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#endif // MAME_VIDEO_LC7985_H

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