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Diffstat (limited to 'src/devices/bus/bbc/userport/lcd.cpp')
-rw-r--r--src/devices/bus/bbc/userport/lcd.cpp112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/userport/lcd.cpp b/src/devices/bus/bbc/userport/lcd.cpp
new file mode 100644
index 00000000000..cdc70bc35fe
--- /dev/null
+++ b/src/devices/bus/bbc/userport/lcd.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Sprow LCD Display
+
+ http://www.sprow.co.uk/bbc/buildit.htm#Lcddisplay
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "lcd.h"
+#include "screen.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_LCD, bbc_lcd_device, "bbc_lcd", "Sprow LCD Display")
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void bbc_lcd_device::device_add_mconfig(machine_config &config)
+{
+ auto &screen = SCREEN(config, "screen", SCREEN_TYPE_LCD);
+ screen.set_refresh_hz(50);
+ screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500));
+ screen.set_size(120, 36);
+ screen.set_visarea_full();
+ screen.set_screen_update(m_lcdc, FUNC(hd44780_device::screen_update));
+ screen.set_palette("palette");
+
+ PALETTE(config, "palette", FUNC(bbc_lcd_device::lcd_palette), 3);
+
+ HD44780(config, m_lcdc);
+ m_lcdc->set_lcd_size(4, 20);
+ m_lcdc->set_pixel_update_cb(FUNC(bbc_lcd_device::lcd_pixel_update));
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_lcd_device - constructor
+//-------------------------------------------------
+
+bbc_lcd_device::bbc_lcd_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, BBC_LCD, tag, owner, clock)
+ , device_bbc_userport_interface(mconfig, *this)
+ , m_lcdc(*this, "lcdc")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_lcd_device::device_start()
+{
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+HD44780_PIXEL_UPDATE(bbc_lcd_device::lcd_pixel_update)
+{
+ // char size is 5x8
+ if (x > 4 || y > 7)
+ return;
+
+ if (pos < 40)
+ {
+ if (pos >= 20)
+ {
+ line += 2;
+ pos -= 20;
+ }
+
+ if (line < 4)
+ bitmap.pix16(line * (8 + 1) + y, pos * 6 + x) = state ? 1 : 2;
+ }
+}
+
+void bbc_lcd_device::lcd_palette(palette_device &palette) const
+{
+ palette.set_pen_color(0, rgb_t(138, 146, 148)); // background
+ palette.set_pen_color(1, rgb_t( 92, 83, 88)); // lcd pixel on
+ palette.set_pen_color(2, rgb_t(131, 136, 139)); // lcd pixel off
+}
+
+uint8_t bbc_lcd_device::pb_r()
+{
+ return m_lcdc->db_r() >> 1;
+}
+
+void bbc_lcd_device::pb_w(uint8_t data)
+{
+ m_lcdc->rs_w(BIT(data, 0));
+ m_lcdc->rw_w(BIT(data, 1));
+ m_lcdc->e_w(BIT(data, 2));
+ m_lcdc->db_w(data << 1);
+}