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// license:BSD-3-Clause
// copyright-holders:Robbbert
/***************************************************************************
Ravensburger Selbstbaucomputer
This is a project described in "Ravensburger" magazine. You had to make
the entire thing (including the circuit boards) yourself.
https://web.archive.org/web/20160321001634/http://petersieg.bplaced.com/?2650_Computer:2650_Selbstbaucomputer
2013-04-23 Skeleton driver.
No instructions, no schematics - it's all guesswork.
The cassette saves a noise but it returns a bad load. This is why MNW is set.
Version 0.9
-----------
Hardware:
0000-07FF ROM "MON1"
0800-1FFF RAM (3x HM6116)
24 pushbuttons and 6-digit LED display on front panel.
Other buttons and switches on the main board.
The few photos show the CPU and a number of ordinary 74LSxxx chips.
There is a XTAL of unknown frequency.
The buttons are labelled CMD, RUN, GOTO, RST, F, MON, PC, NXT but at
this time not all buttons are identified.
What is known:
- Press NXT to read memory. Press NXT again to read the next address.
- Press PC and it says PCxxxx
- Press CMD, it says CND=, you can choose one of these:
-- A displays value of a register. Press A again to see more registers.
-- B sets a breakpoint
-- C clears a breakpoint
-- D dumps blocks to tape
-- E examine tape file
-- F fetch (load) from tape
Quickload: Load the program then press Y. There are 6 that work and
6 that do nothing.
ToDo:
- Cassette
Version V2.0
------------
This used a terminal interface with a few non-standard control codes.
The pushbuttons and LEDs appear to have been done away with.
Commands (must be in uppercase):
A Examine memory; press C to alter memory
B Set breakpoint?
C View breakpoint?
D Dump to screen and tape (at the same time) D 00 04 dumps pages 0 to 4
E Execute
I Registers? (Esc to quit)
L Load
R ? (Esc to quit)
V Verify
ToDo:
- Cassette
****************************************************************************/
#include "emu.h"
#include "cpu/s2650/s2650.h"
#include "imagedev/cassette.h"
#include "imagedev/snapquik.h"
#include "machine/terminal.h"
#include "speaker.h"
#include "ravens.lh"
class ravens_base : public driver_device
{
public:
ravens_base(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_cass(*this, "cassette")
{ }
protected:
DECLARE_READ_LINE_MEMBER(cass_r);
DECLARE_WRITE_LINE_MEMBER(cass_w);
DECLARE_QUICKLOAD_LOAD_MEMBER(quickload_cb);
void mem_map(address_map &map);
required_device<s2650_device> m_maincpu;
required_device<cassette_image_device> m_cass;
};
class ravens_state : public ravens_base
{
public:
ravens_state(const machine_config &mconfig, device_type type, const char *tag)
: ravens_base(mconfig, type, tag)
, m_io_keyboard(*this, "X%u", 0U)
, m_digits(*this, "digit%u", 0U)
, m_leds(*this, "led%u", 0U)
{ }
void ravens(machine_config &config);
protected:
virtual void machine_start() override;
private:
void io_map(address_map &map);
u8 port17_r();
void display_w(offs_t offset, u8 data);
void leds_w(u8 data);
required_ioport_array<3> m_io_keyboard;
output_finder<7> m_digits;
output_finder<8> m_leds;
};
class ravens2_state : public ravens_base
{
public:
ravens2_state(const machine_config &mconfig, device_type type, const char *tag)
: ravens_base(mconfig, type, tag)
, m_terminal(*this, "terminal")
{ }
void ravens2(machine_config &config);
protected:
virtual void machine_reset() override;
virtual void machine_start() override;
private:
void io_map(address_map &map);
void kbd_put(u8 data);
u8 port07_r();
void port1b_w(u8 data);
void port1c_w(u8 data);
u8 m_term_out = 0U;
u8 m_term_in = 0U;
required_device<generic_terminal_device> m_terminal;
};
WRITE_LINE_MEMBER( ravens_base::cass_w )
{
m_cass->output(state ? -1.0 : +1.0);
}
READ_LINE_MEMBER( ravens_base::cass_r )
{
return (m_cass->input() > 0.03) ? 1 : 0;
}
void ravens_state::machine_start()
{
m_digits.resolve();
m_leds.resolve();
}
void ravens_state::display_w(offs_t offset, u8 data)
{
m_digits[offset] = data;
}
void ravens_state::leds_w(u8 data)
{
for (int i = 0; i < 8; i++)
m_leds[i] = !BIT(data, i);
}
u8 ravens2_state::port07_r()
{
u8 ret = m_term_in;
if (!machine().side_effects_disabled())
m_term_in = 0x80;
return ret;
}
u8 ravens_state::port17_r()
{
u8 keyin, i;
keyin = m_io_keyboard[0]->read();
if (keyin != 0xff)
for (i = 0; i < 8; i++)
if (BIT(~keyin, i))
return i | 0x80;
keyin = m_io_keyboard[1]->read();
if (keyin != 0xff)
for (i = 0; i < 8; i++)
if (BIT(~keyin, i))
return i | 0x88;
keyin = m_io_keyboard[2]->read();
if (!BIT(keyin, 0))
m_maincpu->reset();
if (keyin != 0xff)
for (i = 0; i < 8; i++)
if (BIT(~keyin, i))
return (i<<4) | 0x80;
return 0;
}
void ravens2_state::port1b_w(u8 data)
{
if (BIT(data, 7))
return;
if (data == 1) // don't send PSU register to terminal
return;
else
if ((data == 0x08 && m_term_out == 0x20))
data = 0x0c; // FormFeed
else
if ((data == 0x0a && m_term_out == 0x20))
data = 0x0a; // LineFeed
else
data = m_term_out;
m_terminal->write(data);
}
void ravens2_state::port1c_w(u8 data)
{
m_term_out = data;
}
void ravens2_state::machine_reset()
{
m_term_in = 0x80;
}
void ravens2_state::machine_start()
{
save_item(NAME(m_term_out));
save_item(NAME(m_term_in));
}
void ravens_base::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x07ff).rom();
map(0x0800, 0x1fff).ram();
map(0x2000, 0x7FFF).ram(); // for quickload, optional
}
void ravens_state::io_map(address_map &map)
{
map.unmap_value_high();
map(0x09, 0x09).w(FUNC(ravens_state::leds_w)); // LED output port
map(0x10, 0x15).w(FUNC(ravens_state::display_w)); // 6-led display
map(0x17, 0x17).r(FUNC(ravens_state::port17_r)); // pushbuttons
}
void ravens2_state::io_map(address_map &map)
{
map.unmap_value_high();
map(0x07, 0x07).r(FUNC(ravens2_state::port07_r));
map(0x1b, 0x1b).w(FUNC(ravens2_state::port1b_w));
map(0x1c, 0x1c).w(FUNC(ravens2_state::port1c_w));
}
/* Input ports */
static INPUT_PORTS_START( ravens )
PORT_START("X0")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
PORT_START("X1")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_START("X2")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RST") PORT_CODE(KEYCODE_F3)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("NXT") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RUN") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_P) PORT_CHAR('P')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("???") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("???") PORT_CODE(KEYCODE_U) PORT_CHAR('U')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CMD") PORT_CODE(KEYCODE_M) PORT_CHAR('M')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("???") PORT_CODE(KEYCODE_O) PORT_CHAR('O')
INPUT_PORTS_END
void ravens2_state::kbd_put(u8 data)
{
if (data > 0x60) data -= 0x20; // fold to uppercase
m_term_in = data;
}
QUICKLOAD_LOAD_MEMBER(ravens_base::quickload_cb)
{
address_space &space = m_maincpu->space(AS_PROGRAM);
int i;
int quick_addr = 0x900;
int exec_addr;
int quick_length;
std::vector<u8> quick_data;
int read_;
image_init_result result = image_init_result::FAIL;
quick_length = image.length();
if (quick_length < 0x0900)
{
image.seterror(image_error::INVALIDIMAGE, "File too short");
image.message(" File too short");
}
else if (quick_length > 0x8000)
{
image.seterror(image_error::INVALIDIMAGE, "File too long");
image.message(" File too long");
}
else
{
quick_data.resize(quick_length);
read_ = image.fread( &quick_data[0], quick_length);
if (read_ != quick_length)
{
image.seterror(image_error::INVALIDIMAGE, "Cannot read the file");
image.message(" Cannot read the file");
}
else if (quick_data[0] != 0xc6)
{
image.seterror(image_error::INVALIDIMAGE, "Invalid header");
image.message(" Invalid header");
}
else
{
exec_addr = quick_data[2] * 256 + quick_data[3];
if (exec_addr >= quick_length)
{
image.seterror(image_error::INVALIDIMAGE, "Exec address beyond end of file");
image.message(" Exec address beyond end of file");
}
else
{
for (i = quick_addr; i < read_; i++)
space.write_byte(i, quick_data[i]);
/* display a message about the loaded quickload */
image.message(" Quickload: size=%04X : exec=%04X",quick_length,exec_addr);
// Start the quickload
m_maincpu->set_state_int(S2650_PC, exec_addr);
result = image_init_result::PASS;
}
}
}
return result;
}
void ravens_state::ravens(machine_config &config)
{
/* basic machine hardware */
S2650(config, m_maincpu, XTAL(1'000'000)); // frequency is unknown
m_maincpu->set_addrmap(AS_PROGRAM, &ravens_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &ravens_state::io_map);
m_maincpu->sense_handler().set(FUNC(ravens_state::cass_r));
m_maincpu->flag_handler().set(FUNC(ravens_state::cass_w));
/* video hardware */
config.set_default_layout(layout_ravens);
/* quickload */
QUICKLOAD(config, "quickload", "pgm", attotime::from_seconds(1)).set_load_callback(FUNC(ravens_state::quickload_cb));
SPEAKER(config, "mono").front_center();
/* cassette */
CASSETTE(config, m_cass);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
}
void ravens2_state::ravens2(machine_config &config)
{
/* basic machine hardware */
S2650(config, m_maincpu, XTAL(1'000'000)); // frequency is unknown
m_maincpu->set_addrmap(AS_PROGRAM, &ravens2_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &ravens2_state::io_map);
m_maincpu->sense_handler().set(FUNC(ravens2_state::cass_r));
m_maincpu->flag_handler().set(FUNC(ravens2_state::cass_w));
/* video hardware */
GENERIC_TERMINAL(config, m_terminal, 0);
m_terminal->set_keyboard_callback(FUNC(ravens2_state::kbd_put));
/* quickload */
QUICKLOAD(config, "quickload", "pgm", attotime::from_seconds(1)).set_load_callback(FUNC(ravens2_state::quickload_cb));
SPEAKER(config, "mono").front_center();
/* cassette */
CASSETTE(config, m_cass);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
}
/* ROM definition */
ROM_START( ravens )
ROM_REGION( 0x0800, "maincpu", 0 )
ROM_SYSTEM_BIOS( 0, "v1.0", "V1.0" )
ROMX_LOAD( "mon_v1.0.bin", 0x0000, 0x0800, CRC(785eb1ad) SHA1(c316b8ac32ab6aa37746af37b9f81a23367fedd8), ROM_BIOS(0))
ROM_SYSTEM_BIOS( 1, "v0.9", "V0.9" )
ROMX_LOAD( "mon_v0_9.bin", 0x0000, 0x07b5, CRC(2f9b9178) SHA1(ec2ebbc80ee9ff2502c1409ab4f99127032ed724), ROM_BIOS(1))
ROM_END
ROM_START( ravens2 )
ROM_REGION( 0x0800, "maincpu", 0 )
ROM_LOAD( "mon_v2.0.bin", 0x0000, 0x0800, CRC(bcd47c58) SHA1(f261a3f128fbedbf59a8b5480758fff4d7f76de1))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1984, ravens, 0, 0, ravens, ravens, ravens_state, empty_init, "Joseph Glagla and Dieter Feiler", "Ravensburger Selbstbaucomputer V0.9", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE )
COMP( 1985, ravens2, ravens, 0, ravens2, ravens, ravens2_state, empty_init, "Joseph Glagla and Dieter Feiler", "Ravensburger Selbstbaucomputer V2.0", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE )
|