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microvsn: move lcd chip emulation to device (nw)

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This commit is contained in:
hap 2020-04-12 15:37:07 +02:00
parent edcee4f8cb
commit 1c728274e9
6 changed files with 228 additions and 68 deletions
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12
scripts/src/video.lua
View File

@ -399,6 +399,18 @@ if (VIDEOS["HD66421"]~=null) then
}
end
--------------------------------------------------
--
--@src/devices/video/hlcd0488.h,VIDEOS["HLCD0488"] = true
--------------------------------------------------
if (VIDEOS["HLCD0488"]~=null) then
files {
MAME_DIR .. "src/devices/video/hlcd0488.cpp",
MAME_DIR .. "src/devices/video/hlcd0488.h",
}
end
--------------------------------------------------
--
--@src/devices/video/hlcd0515.h,VIDEOS["HLCD0515"] = true

1
scripts/target/mame/arcade.lua
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@ -319,6 +319,7 @@ VIDEOS["HD44780"] = true
VIDEOS["HD61830"] = true
VIDEOS["HD63484"] = true
--VIDEOS["HD66421"] = true
--VIDEOS["HLCD0488"] = true
--VIDEOS["HLCD0515"] = true
--VIDEOS["HLCD0538"] = true
VIDEOS["HUC6202"] = true

1
scripts/target/mame/mess.lua
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@ -345,6 +345,7 @@ VIDEOS["HD61603"] = true
VIDEOS["HD61830"] = true
--VIDEOS["HD63484"] = true
VIDEOS["HD66421"] = true
VIDEOS["HLCD0488"] = true
VIDEOS["HLCD0515"] = true
VIDEOS["HLCD0538"] = true
VIDEOS["HP1LL3"] = true

104
src/devices/video/hlcd0488.cpp Normal file
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@ -0,0 +1,104 @@
// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*
Hughes HLCD 0488 LCD Driver
16*16 segment outputs, direct drive
TODO:
- should all control be edge-triggered?
- output polarity flip
*/
#include "emu.h"
#include "video/hlcd0488.h"
DEFINE_DEVICE_TYPE(HLCD0488, hlcd0488_device, "hlcd0488", "Hughes HLCD 0488 LCD Driver")
//-------------------------------------------------
// constructor
//-------------------------------------------------
hlcd0488_device::hlcd0488_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) :
device_t(mconfig, HLCD0488, tag, owner, clock),
m_write_cols(*this)
{
memset(m_latch, 0, 8);
memset(m_hold, 0, 8);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void hlcd0488_device::device_start()
{
m_write_cols.resolve_safe();
m_sync_timer = timer_alloc();
// register for savestates
save_item(NAME(m_latch_pulse));
save_item(NAME(m_latch_pulse_prev));
save_item(NAME(m_data_clk));
save_item(NAME(m_data_clk_prev));
save_item(NAME(m_data));
save_item(NAME(m_count));
save_item(NAME(m_latch));
save_item(NAME(m_hold));
}
//-------------------------------------------------
// handlers
//-------------------------------------------------
void hlcd0488_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
// Latch pulse, when high, resets the %8 latch address counter
if (m_latch_pulse)
m_count = 0;
// The addressed latches load when -Data Clk is low
if (!m_data_clk)
m_latch[m_count] = m_data;
// The latch address counter is incremented on rising edges of -Data Clk
if (!m_data_clk_prev && m_data_clk && !m_latch_pulse)
m_count = (m_count + 1) & 7;
// A parallel transfer of data from the addressed latches to the holding latches occurs
// whenever Latch Pulse is high and -Data Clk is high
if (m_latch_pulse && m_data_clk)
{
for (int i = 0; i < 8; i++)
m_hold[i] = m_latch[i];
u16 row = (m_hold[0] << 12) | (m_hold[1] << 8) | (m_hold[2] << 4) | m_hold[3];
u16 col = (m_hold[4] << 12) | (m_hold[5] << 8) | (m_hold[6] << 4) | m_hold[7];
m_write_cols(row, col);
}
m_latch_pulse_prev = m_latch_pulse;
m_data_clk_prev = m_data_clk;
}
WRITE_LINE_MEMBER(hlcd0488_device::latch_pulse_w)
{
m_latch_pulse = state ? 1 : 0;
m_sync_timer->adjust(attotime::zero);
}
WRITE_LINE_MEMBER(hlcd0488_device::data_clk_w)
{
m_data_clk = state ? 1 : 0;
m_sync_timer->adjust(attotime::zero);
}
void hlcd0488_device::data_w(u8 data)
{
m_data = data & 0xf;
m_sync_timer->adjust(attotime::zero);
}

78
src/devices/video/hlcd0488.h Normal file
View File

@ -0,0 +1,78 @@
// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*
Hughes HLCD 0488 LCD Driver
*/
#ifndef MAME_VIDEO_HLCD0488_H
#define MAME_VIDEO_HLCD0488_H
#pragma once
// pinout reference
/*
____ ____
ROW 4 1 |* \_/ | 40 VDD
ROW 5 2 | | 39 ROW 1
ROW 6 3 | | 38 ROW 2
/DATA CLK 4 | | 37 ROW 3
LATCH PULSE 5 | | 36 COL 1
DATA 0 6 | | 35 COL 2
DATA 1 7 | | 34 COL 3
DATA 2 8 | | 33 COL 4
DATA 3 9 | | 32 COL 5
ROW 16 10 | HLCD 0488 | 31 COL 6
ROW 15 11 | | 30 COL 7
ROW 14 12 | | 29 COL 8
ROW 13 13 | | 28 COL 9
ROW 12 14 | | 27 COL 10
ROW 11 15 | | 26 COL 11
ROW 10 16 | | 25 COL 12
ROW 9 17 | | 24 COL 13
ROW 8 18 | | 23 COL 14
ROW 7 19 | | 22 COL 15
GND 20 |___________| 21 COL 16
*/
class hlcd0488_device : public device_t
{
public:
hlcd0488_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// configuration helpers
auto write_cols() { return m_write_cols.bind(); } // COL pins in data, ROW pins in offset
DECLARE_WRITE_LINE_MEMBER(latch_pulse_w);
DECLARE_WRITE_LINE_MEMBER(data_clk_w);
void data_w(u8 data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
// pin state
int m_latch_pulse = 0;
int m_latch_pulse_prev = 0;
int m_data_clk = 0;
int m_data_clk_prev = 0;
u8 m_data = 0;
u8 m_count = 0;
u8 m_latch[8];
u8 m_hold[8];
emu_timer *m_sync_timer;
devcb_write16 m_write_cols;
};
DECLARE_DEVICE_TYPE(HLCD0488, hlcd0488_device)
#endif // MAME_VIDEO_HLCD0488_H

100
src/mame/drivers/microvsn.cpp
View File

@ -1,6 +1,6 @@
// license:BSD-3-Clause
// copyright-holders:Wilbert Pol, hap
// thanks-to:Kevin Horton, Sean Riddle
// thanks-to:Dan Boris, Kevin Horton, Sean Riddle
/***************************************************************************
Milton Bradley MicroVision, handheld game console
@ -19,7 +19,8 @@ The Connect Four I8021 game is clocked at around 2MHz. The TMS1100 versions
of the games were clocked at around 500KHz, 550KHz, or 350KHz.
Each game had a screen- and keypad overlay attached to it, MAME external
artwork is recommended.
artwork is recommended. It's also advised to disable screen filtering,
eg. with -prescale, or on Windows simply -video gdi.
TODO:
- Finish support for i8021 based cartridges
@ -34,6 +35,7 @@ TODO:
#include "cpu/tms1000/tms1100.h"
#include "sound/dac.h"
#include "sound/volt_reg.h"
#include "video/hlcd0488.h"
#include "emupal.h"
#include "softlist.h"
@ -54,6 +56,7 @@ public:
m_dac( *this, "dac" ),
m_i8021( *this, "i8021_cpu" ),
m_tms1100( *this, "tms1100_cpu" ),
m_lcd(*this, "lcd"),
m_cart(*this, "cartslot"),
m_inputs(*this, "COL%u", 0),
m_paddle(*this, "PADDLE"),
@ -96,6 +99,7 @@ private:
required_device<dac_byte_interface> m_dac;
optional_device<i8021_device> m_i8021;
optional_device<tms1100_cpu_device> m_tms1100;
required_device<hlcd0488_device> m_lcd;
required_device<generic_slot_device> m_cart;
required_ioport_array<3> m_inputs;
required_ioport m_paddle;
@ -116,7 +120,7 @@ private:
// generic variables
void update_lcd();
void lcd_write(uint8_t control, uint8_t data);
DECLARE_WRITE16_MEMBER(lcd_output_w);
void apply_settings(void);
@ -126,11 +130,9 @@ private:
bool m_paddle_auto;
bool m_paddle_on;
uint8_t m_lcd_latch[8];
uint8_t m_lcd_holding_latch[8];
uint8_t m_lcd_latch_index;
uint8_t m_lcd[16][16];
uint8_t m_lcd_control_old;
uint8_t m_lcd_data[16][16];
u16 m_lcd_row;
u16 m_lcd_col;
};
@ -165,20 +167,14 @@ void microvision_state::machine_start()
save_item(NAME(m_t1));
save_item(NAME(m_r));
save_item(NAME(m_o));
save_item(NAME(m_lcd_latch));
save_item(NAME(m_lcd_latch_index));
save_item(NAME(m_lcd));
save_item(NAME(m_lcd_control_old));
save_item(NAME(m_lcd_holding_latch));
}
void microvision_state::machine_reset()
{
apply_settings();
std::fill(std::begin(m_lcd_latch), std::end(m_lcd_latch), 0);
for (auto &elem : m_lcd)
for (auto &elem : m_lcd_data)
std::fill(std::begin(elem), std::end(elem), 0);
m_o = 0;
@ -193,15 +189,15 @@ void microvision_state::machine_reset()
void microvision_state::update_lcd()
{
uint16_t row = ( m_lcd_holding_latch[0] << 12 ) | ( m_lcd_holding_latch[1] << 8 ) | ( m_lcd_holding_latch[2] << 4 ) | m_lcd_holding_latch[3];
uint16_t col = ( m_lcd_holding_latch[4] << 12 ) | ( m_lcd_holding_latch[5] << 8 ) | ( m_lcd_holding_latch[6] << 4 ) | m_lcd_holding_latch[7];
uint16_t row = m_lcd_row;
uint16_t col = m_lcd_col;
LOG( "row = %04x, col = %04x\n", row, col );
for ( int i = 0; i < 16; i++ )
{
uint16_t temp = row;
for (auto & elem : m_lcd)
for (auto & elem : m_lcd_data)
{
if ( ( temp & col ) & 0x8000 )
{
@ -220,7 +216,7 @@ uint32_t microvision_state::screen_update(screen_device &screen, bitmap_ind16 &b
{
for ( uint8_t j = 0; j < 16; j++ )
{
bitmap.pix16(i,j) = m_lcd [i] [j];
bitmap.pix16(i,j) = m_lcd_data [i] [j];
}
}
@ -232,7 +228,7 @@ WRITE_LINE_MEMBER(microvision_state::screen_vblank)
{
if ( state )
{
for (auto & elem : m_lcd)
for (auto & elem : m_lcd_data)
{
for ( int j= 0; j < 16; j++ )
{
@ -246,47 +242,11 @@ WRITE_LINE_MEMBER(microvision_state::screen_vblank)
}
}
/*
control is signals LCD5 LCD4
LCD5 = -Data Clk on 0488
LCD4 = Latch pulse on 0488
LCD3 = Data 0
LCD2 = Data 1
LCD1 = Data 2
LCD0 = Data 3
data is signals LCD3 LCD2 LCD1 LCD0
*/
void microvision_state::lcd_write(uint8_t control, uint8_t data)
WRITE16_MEMBER( microvision_state::lcd_output_w )
{
// Latch pulse, when high, resets the %8 latch address counter
if ( control & 0x01 ) {
m_lcd_latch_index = 0;
}
// The addressed latches load when -Data Clk is low
if ( ! ( control & 0x02 ) ) {
m_lcd_latch[ m_lcd_latch_index & 0x07 ] = data & 0x0f;
}
// The latch address counter is incremented on rising edges of -Data Clk
if ( ( ! ( m_lcd_control_old & 0x02 ) ) && ( control & 0x02 ) ) {
// Check if Latch pule is low
if ( ! ( control & 0x01 ) ) {
m_lcd_latch_index++;
}
}
// A parallel transfer of data from the addressed latches to the holding latches occurs
// whenever Latch Pulse is high and -Data Clk is high
if ( control == 3 ) {
for ( int i = 0; i < 8; i++ ) {
m_lcd_holding_latch[i] = m_lcd_latch[i];
}
update_lcd();
}
m_lcd_control_old = control;
m_lcd_row = offset;
m_lcd_col = data;
update_lcd();
}
@ -331,7 +291,9 @@ WRITE8_MEMBER( microvision_state::i8021_p1_write )
{
LOG( "p1_write: %02x\n", data );
lcd_write( data & 0x03, data >> 4 );
m_lcd->data_w(data >> 4 & 0xf);
m_lcd->latch_pulse_w(BIT(data, 0));
m_lcd->data_clk_w(BIT(data, 1));
}
@ -433,9 +395,7 @@ WRITE16_MEMBER( microvision_state::tms1100_write_o )
LOG("write_o: %04x\n", data);
// O0-O3: LCD data
m_o = data;
lcd_write( ( m_r >> 6 ) & 0x03, m_o & 0x0f );
m_lcd->data_w(data & 0xf);
}
@ -449,8 +409,8 @@ WRITE16_MEMBER( microvision_state::tms1100_write_r )
{
// range is ~360us to ~2663us (measured on 4952-79 REV B PCB)
// note that the games don't use the whole range, so there's a deadzone around the edges
float step = (2663 - 360) / 255.0;
m_paddle_timer->adjust(attotime::from_usec(360 + m_paddle->read() * step));
float step = (2000 - 500) / 255.0; // approximate it
m_paddle_timer->adjust(attotime::from_usec(500 + m_paddle->read() * step));
}
// R0: speaker lead 2
@ -459,7 +419,8 @@ WRITE16_MEMBER( microvision_state::tms1100_write_r )
// R6: LCD latch pulse
// R7: LCD data clock
lcd_write((data >> 6) & 0x03, m_o & 0x0f);
m_lcd->latch_pulse_w(BIT(data, 6));
m_lcd->data_clk_w(BIT(data, 7));
// R8-R10: input mux
m_r = data;
@ -640,13 +601,16 @@ void microvision_state::microvision(machine_config &config)
m_tms1100->r().set(FUNC(microvision_state::tms1100_write_r));
/* video hardware */
HLCD0488(config, m_lcd);
m_lcd->write_cols().set(FUNC(microvision_state::lcd_output_w));
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_LCD));
screen.set_refresh_hz(60);
screen.set_vblank_time(0);
screen.set_screen_update(FUNC(microvision_state::screen_update));
screen.screen_vblank().set(FUNC(microvision_state::screen_vblank));
screen.set_size(16, 16);
screen.set_visarea(0, 15, 0, 15);
screen.set_visarea_full();
screen.set_palette("palette");
PALETTE(config, "palette", FUNC(microvision_state::microvision_palette), 16);