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// license:BSD-3-Clause
// copyright-holders:AJR
/************************************************************************************************************
Skeleton driver for Telex 277/D IBM 3277-compatible coaxial terminal.
************************************************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/i8155.h"
class telex277d_state : public driver_device
{
public:
telex277d_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_chargen(*this, "chargen")
{
}
void telex277d(machine_config &config);
private:
void mem_map(address_map &map);
void io_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_region_ptr<u8> m_chargen;
};
void telex277d_state::mem_map(address_map &map)
{
map(0x0000, 0x1fff).rom().region("program", 0);
map(0x4000, 0x47ff).ram();
map(0x8000, 0x80ff).rw("ramio", FUNC(i8155_device::memory_r), FUNC(i8155_device::memory_w));
}
void telex277d_state::io_map(address_map &map)
{
map(0x80, 0x87).rw("ramio", FUNC(i8155_device::io_r), FUNC(i8155_device::io_w));
}
static INPUT_PORTS_START(telex277d)
INPUT_PORTS_END
void telex277d_state::telex277d(machine_config &config)
{
I8085A(config, m_maincpu, 6.144_MHz_XTAL);
m_maincpu->set_addrmap(AS_PROGRAM, &telex277d_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &telex277d_state::io_map);
I8155(config, "ramio", 6.144_MHz_XTAL / 2);
}
ROM_START(telex277d) // D8085A, P8155. bank of 8 dips between these 2 chips. Xtals on cpu board = 6.144,14.286MHz; Xtal on video board = 16.414
ROM_REGION(0x2000, "program", 0)
ROM_LOAD("15834.bin", 0x0000, 0x0800, CRC(364602ed) SHA1(574b1052ab000cfb9e7f194454de65f5255c250e))
ROM_LOAD("15835.bin", 0x0800, 0x0800, CRC(b587d005) SHA1(de38b1dcbb871dc5f7dcbc177dfcbc25ecc743c4))
ROM_LOAD("15836.bin", 0x1000, 0x0800, CRC(33a7179f) SHA1(c4b2a8f9d2b3e2f97c7d9b5458cad314fc8c79c1))
ROM_LOAD("15837.bin", 0x1800, 0x0800, CRC(6d726662) SHA1(cff3ea2f06b802b94acfb780014d0e389cb61c42))
ROM_REGION(0x0400, "chargen", 0)
ROM_LOAD("15181_font.bin", 0x0000, 0x0400, CRC(2a7abd0b) SHA1(4456723c59307671dd0615723e6439f6532df531))
ROM_END
COMP(1979, telex277d, 0, 0, telex277d, telex277d, telex277d_state, empty_init, "Telex Computer Products", "Telex 277-D Display Terminal (Model 2)", MACHINE_IS_SKELETON)
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