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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************
Mannesmann Kienzle System 9002 Terminal
2017-08-17 Skeleton driver.
Chips used:
- Siemens SAB8085A-P
- NEC D8251AFC * 2
- NEC D4016C-3 * 4 + 2
- ST M2764A-4F1 * 4
- HD6845P
Chargen is missing.
Both uarts are programmed as synchronous. A conversion box is needed
to talk with RS-232.
****************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "video/mc6845.h"
#include "emupal.h"
#include "screen.h"
#include "machine/clock.h"
#include "machine/i8251.h"
#include "bus/rs232/rs232.h"
class sys9002_state : public driver_device
{
public:
sys9002_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_vram(*this, "videoram")
, m_palette(*this, "palette")
, m_p_chargen(*this, "chargen")
{ }
void sys9002(machine_config &config);
private:
MC6845_UPDATE_ROW(crtc_update_row);
void io_map(address_map &map);
void mem_map(address_map &map);
u8 port11_r();
required_device<cpu_device> m_maincpu;
required_shared_ptr<uint8_t> m_vram;
required_device<palette_device> m_palette;
required_region_ptr<u8> m_p_chargen;
};
void sys9002_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x7fff).rom(); // 4 * 4K ROM
map(0x8000, 0x9fff).ram(); // 4 * 2k RAM
map(0xa000, 0xa7ff).ram().share("videoram"); // 2k RAM
map(0xc000, 0xc7ff).ram(); // attributes??
map(0xe000, 0xefff).ram(); // ??
}
void sys9002_state::io_map(address_map &map)
{
map.unmap_value_high();
map.global_mask(0xff);
map(0x04, 0x04).rw("crtc", FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
map(0x05, 0x05).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x08, 0x09).rw("uart1", FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0x10, 0x11).r(FUNC(sys9002_state::port11_r)); //nopr(); // continuous read
map(0x1c, 0x1d).rw("uart2", FUNC(i8251_device::read), FUNC(i8251_device::write));
}
u8 sys9002_state::port11_r()
{
static u8 data = 0;
data += 0x08;
return data;
}
/* Input ports */
static INPUT_PORTS_START( sys9002 )
INPUT_PORTS_END
MC6845_UPDATE_ROW( sys9002_state::crtc_update_row )
{
rgb_t const *const pens = m_palette->palette()->entry_list_raw();
uint32_t *p = &bitmap.pix(y);
for (uint16_t x = 0; x < x_count; x++)
{
uint16_t mem = (ma + x) & 0x7ff;
uint8_t chr = m_vram[mem] & 0x7f;
/* get pattern of pixels for that character scanline */
uint8_t gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0);
/* Display a scanline of a character (8 pixels) */
*p++ = pens[BIT(gfx, 7)];
*p++ = pens[BIT(gfx, 6)];
*p++ = pens[BIT(gfx, 5)];
*p++ = pens[BIT(gfx, 4)];
*p++ = pens[BIT(gfx, 3)];
*p++ = pens[BIT(gfx, 2)];
*p++ = pens[BIT(gfx, 1)];
*p++ = pens[BIT(gfx, 0)];
}
}
void sys9002_state::sys9002(machine_config &config)
{
/* basic machine hardware */
I8085A(config, m_maincpu, XTAL(2'000'000)); // XTAL not visible on images
m_maincpu->set_addrmap(AS_PROGRAM, &sys9002_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &sys9002_state::io_map);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
screen.set_refresh_hz(60);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); // not correct
screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
screen.set_size(32*8, 32*8);
screen.set_visarea(0*8, 32*8-1, 2*8, 30*8-1);
//GFXDECODE(config, "gfxdecode", m_palette, gfx_sys9002);
PALETTE(config, m_palette, palette_device::MONOCHROME);
/* Devices */
mc6845_device &crtc(MC6845(config, "crtc", XTAL(2'000'000))); // clk unknown
crtc.set_screen("screen");
crtc.set_show_border_area(false);
crtc.set_char_width(8);
crtc.set_update_row_callback(FUNC(sys9002_state::crtc_update_row));
clock_device &uart_clock(CLOCK(config, "uart_clock", 9600));
uart_clock.signal_handler().set("uart1", FUNC(i8251_device::write_txc));
uart_clock.signal_handler().append("uart1", FUNC(i8251_device::write_rxc));
uart_clock.signal_handler().append("uart2", FUNC(i8251_device::write_txc));
uart_clock.signal_handler().append("uart2", FUNC(i8251_device::write_rxc));
i8251_device &uart1(I8251(config, "uart1", 0)); // sync
uart1.txd_handler().set("rs232a", FUNC(rs232_port_device::write_txd));
uart1.dtr_handler().set("rs232a", FUNC(rs232_port_device::write_dtr));
uart1.rts_handler().set("rs232a", FUNC(rs232_port_device::write_rts));
rs232_port_device &rs232a(RS232_PORT(config, "rs232a", default_rs232_devices, nullptr));
rs232a.rxd_handler().set("uart1", FUNC(i8251_device::write_rxd));
rs232a.dsr_handler().set("uart1", FUNC(i8251_device::write_dsr));
rs232a.cts_handler().set("uart1", FUNC(i8251_device::write_cts));
i8251_device &uart2(I8251(config, "uart2", 0)); // sync
uart2.txd_handler().set("rs232b", FUNC(rs232_port_device::write_txd));
uart2.dtr_handler().set("rs232b", FUNC(rs232_port_device::write_dtr));
uart2.rts_handler().set("rs232b", FUNC(rs232_port_device::write_rts));
uart2.rxrdy_handler().set_inputline("maincpu", I8085_RST55_LINE);
rs232_port_device &rs232b(RS232_PORT(config, "rs232b", default_rs232_devices, "terminal"));
rs232b.rxd_handler().set("uart2", FUNC(i8251_device::write_rxd));
rs232b.dsr_handler().set("uart2", FUNC(i8251_device::write_dsr));
rs232b.cts_handler().set("uart2", FUNC(i8251_device::write_cts));
}
/* ROM definition */
ROM_START( sys9002 )
ROM_REGION( 0x8000, "maincpu", 0 )
ROM_LOAD( "55-040.bin", 0x0000, 0x2000, CRC(781eaca9) SHA1(1bdae2bcc43deaef2eb1d6ec302fbadbb779fd48))
ROM_LOAD( "55-041.bin", 0x2000, 0x2000, CRC(0f89fe81) SHA1(2dc8de7dabaf11a150cfd34460c5b47612cf5e61))
ROM_LOAD( "55-042.bin", 0x4000, 0x2000, CRC(e6fbc837) SHA1(fc11f6a6927709552bedf06b9eb0dc66e9a81264))
ROM_LOAD( "55-048.bin", 0x6000, 0x2000, CRC(879ef945) SHA1(a54fc01ac26a3cd05f6d1e1139d6d99198556575))
ROM_REGION( 0x0800, "chargen", 0 ) // chargen not dumped, using one from mbee for now
ROM_LOAD("charrom.bin", 0x0000, 0x0800, BAD_DUMP CRC(b149737b) SHA1(a3cd4f5d0d3c71137cd1f0f650db83333a2e3597) )
ROM_END
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 198?, sys9002, 0, 0, sys9002, sys9002, sys9002_state, empty_init, "Mannesmann Kienzle", "System 9002 Terminal", MACHINE_IS_SKELETON | MACHINE_SUPPORTS_SAVE )
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