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diff --git a/src/mame/drivers/cd2650.cpp b/src/mame/drivers/cd2650.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Robbbert
-/***************************************************************************
-
-Central Data 2650 Computer System
-
-2010-04-08 Skeleton driver.
-
-No info available on this computer apart from a few newsletters and
-magazine articles. The computer was described in a series of articles
-published between April and June 1977 in Radio-Electronics, which include
-supposedly complete schematics and fairly detailed subsystem descriptions.
-There is supposed to be a “Computer System Manual” with definitive revised
-schematics, but this has not been found yet.
-
-All signals to and from the 2650 board (including the built-in 300 baud
-Kansas City standard cassette tape interface) are passed through six ribbon
-cables. Central Data later produced an “extender board” that adapted the
-bus signals to a S-100 backplane. This interface was missing a considerable
-number of standard S-100 timing signals, though it was compatible at least
-with some dynamic RAM boards released by the company.
-
-The unusual XTAL frequency seems deliberately chosen to produce a vertical
-sync rate of exactly 60 Hz.
-
-The system only uses 1000-14FF for videoram and 17F0-17FF for
-scratch ram. All other ram is optional.
-
-Commands (must be in uppercase):
-A Examine memory; press C to alter memory
-B Set breakpoint
-C Clear unused breakpoint
-D Dump to cassette (must save each block separately, then an empty block)
-E Execute
-I Inspect Registers after breakpoint
-L Load from cassette
-R Turn on cassette motor
-V Verify cassette vs memory
-Press Esc to exit most commands.
-
-TODO
-- Cassette doesn't work. Saving is ok because the data can be loaded onto
- the Super-80, but this system has great difficulty loading its own programs.
-
-****************************************************************************/
-
-#define CHARACTER_WIDTH 8
-#define CHARACTER_HEIGHT 8
-#define CHARACTER_LINES 12
-
-#include "emu.h"
-#include "cpu/s2650/s2650.h"
-//#include "bus/s100/s100.h"
-#include "imagedev/cassette.h"
-#include "imagedev/snapquik.h"
-#include "machine/74259.h"
-#include "machine/keyboard.h"
-#include "machine/timer.h"
-#include "sound/beep.h"
-#include "emupal.h"
-#include "screen.h"
-#include "speaker.h"
-
-class cd2650_state : public driver_device
-{
-public:
- cd2650_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_p_videoram(*this, "videoram")
- , m_p_chargen(*this, "chargen")
- , m_cass(*this, "cassette")
- { }
-
- void cd2650(machine_config &config);
-
-private:
- void data_map(address_map &map);
- void io_map(address_map &map);
- void mem_map(address_map &map);
- u8 keyin_r();
- void kbd_put(u8 data);
- DECLARE_WRITE_LINE_MEMBER(tape_deck_on_w);
- DECLARE_READ_LINE_MEMBER(cass_r);
- TIMER_DEVICE_CALLBACK_MEMBER(kansas_w);
- TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
- DECLARE_QUICKLOAD_LOAD_MEMBER(quickload_cb);
- u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- u8 m_term_data;
- bool m_cassbit;
- bool m_cassold;
- u8 m_cass_data[4];
- void machine_reset() override;
- void machine_start() override;
- required_device<s2650_device> m_maincpu;
- required_shared_ptr<u8> m_p_videoram;
- required_region_ptr<u8> m_p_chargen;
- required_device<cassette_image_device> m_cass;
-};
-
-
-TIMER_DEVICE_CALLBACK_MEMBER(cd2650_state::kansas_w)
-{
- m_cass_data[3]++;
-
- if (m_cassbit != m_cassold)
- {
- m_cass_data[3] = 0;
- m_cassold = m_cassbit;
- }
-
- if (m_cassbit)
- m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 2400Hz
- else
- m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 1200Hz
-}
-
-TIMER_DEVICE_CALLBACK_MEMBER(cd2650_state::kansas_r)
-{
- /* cassette - turn 1200/2400Hz to a bit */
- m_cass_data[1]++;
- u8 cass_ws = (m_cass->input() > +0.03) ? 1 : 0;
-
- if (cass_ws != m_cass_data[0])
- {
- m_cass_data[0] = cass_ws;
- m_cass_data[2] = ((m_cass_data[1] < 12) ? 1 : 0);
- m_cass_data[1] = 0;
- }
-}
-
-WRITE_LINE_MEMBER(cd2650_state::tape_deck_on_w)
-{
- m_cass->change_state(state ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
-}
-
-READ_LINE_MEMBER(cd2650_state::cass_r)
-{
- return m_cass_data[2];
-}
-
-u8 cd2650_state::keyin_r()
-{
- u8 ret = m_term_data;
- m_term_data = ret | 0x80;
- return ret;
-}
-
-void cd2650_state::mem_map(address_map &map)
-{
- map.unmap_value_high();
- map(0x0000, 0x0fff).rom().region("roms", 0);
- map(0x1000, 0x7fff).ram().share("videoram");
-}
-
-void cd2650_state::io_map(address_map &map)
-{
- map.unmap_value_high();
- //map(0x80, 0x84) disk i/o
-}
-
-void cd2650_state::data_map(address_map &map)
-{
- map(S2650_DATA_PORT, S2650_DATA_PORT).r(FUNC(cd2650_state::keyin_r)).w("outlatch", FUNC(f9334_device::write_nibble_d3));
-}
-
-/* Input ports */
-static INPUT_PORTS_START( cd2650 )
-INPUT_PORTS_END
-
-
-void cd2650_state::machine_reset()
-{
- m_term_data = 0x80;
-}
-
-void cd2650_state::machine_start()
-{
- save_item(NAME(m_term_data));
- save_item(NAME(m_cassbit));
- save_item(NAME(m_cassold));
- save_item(NAME(m_cass_data));
-}
-
-u32 cd2650_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
-/* The video is unusual in that the characters in each line are spaced at 16 bytes in memory,
- thus line 1 starts at 1000, line 2 at 1001, etc. There are 16 lines of 80 characters.
- Further, the letters have bit 6 set low, thus the range is 01 to 1A.
- When the bottom of the screen is reached, it does not scroll, it just wraps around. */
-
- u16 offset=0,sy=0;
-
- for (u8 y = 0; y < 16; y++)
- {
- for (u8 ra = 0; ra < CHARACTER_LINES; ra++)
- {
- u16 *p = &bitmap.pix(sy++);
-
- for (u16 x = 0; x < 80; x++)
- {
- u8 gfx = 0;
- if (ra < CHARACTER_HEIGHT)
- {
- u16 mem = offset + y + (x<<4);
-
- if (mem > 0x4ff)
- mem -= 0x500;
-
- u8 chr = m_p_videoram[mem] & 0x3f;
-
- gfx = m_p_chargen[(bitswap<8>(chr,7,6,2,1,0,3,4,5)<<3) | ra];
- }
-
- /* Display a scanline of a character */
- *p++ = BIT(gfx, 7);
- *p++ = BIT(gfx, 6);
- *p++ = BIT(gfx, 5);
- *p++ = BIT(gfx, 4);
- *p++ = BIT(gfx, 3);
- *p++ = BIT(gfx, 2);
- *p++ = BIT(gfx, 1);
- *p++ = BIT(gfx, 0);
- }
- }
- }
- return 0;
-}
-
-/* F4 Character Displayer */
-static const gfx_layout cd2650_charlayout =
-{
- 8, 8, /* 8 x 8 characters */
- 192, /* 64 characters in char.rom + 128 characters in char2.rom */
- 1, /* 1 bits per pixel */
- { 0 }, /* no bitplanes */
- /* x offsets */
- { 0, 1, 2, 3, 4, 5, 6, 7 },
- /* y offsets */
- { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
- 8*8 /* every char takes 8 bytes */
-};
-
-static GFXDECODE_START( gfx_cd2650 )
- GFXDECODE_ENTRY( "chargen", 0x0000, cd2650_charlayout, 0, 1 )
-GFXDECODE_END
-
-void cd2650_state::kbd_put(u8 data)
-{
- if (data)
- m_term_data = data;
-}
-
-QUICKLOAD_LOAD_MEMBER(cd2650_state::quickload_cb)
-{
- int i;
- image_init_result result = image_init_result::FAIL;
-
- int quick_length = image.length();
- if (quick_length < 0x1500)
- {
- 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
- {
- std::vector<u8> quick_data(quick_length);
- int 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] != 0x40)
- {
- image.seterror(image_error::INVALIDIMAGE, "Invalid header");
- image.message(" Invalid header");
- }
- else
- {
- int exec_addr = quick_data[1] * 256 + quick_data[2];
-
- 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
- {
- // do not overwite system area (17E0-17FF) otherwise chess3 has problems
- read_ = 0x17e0;
- if (quick_length < 0x17e0)
- read_ = quick_length;
-
- for (i = 0x1500; i < read_; i++)
- m_p_videoram[i-0x1000] = quick_data[i];
-
- if (quick_length > 0x17ff)
- for (i = 0x1800; i < quick_length; i++)
- m_p_videoram[i-0x1000] = 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 cd2650_state::cd2650(machine_config &config)
-{
- /* basic machine hardware */
- S2650(config, m_maincpu, XTAL(14'192'640) / 12); // 1.182720MHz according to RE schematic
- m_maincpu->set_addrmap(AS_PROGRAM, &cd2650_state::mem_map);
- m_maincpu->set_addrmap(AS_IO, &cd2650_state::io_map);
- m_maincpu->set_addrmap(AS_DATA, &cd2650_state::data_map);
- m_maincpu->sense_handler().set(FUNC(cd2650_state::cass_r));
- m_maincpu->flag_handler().set([this] (bool state) { m_cassbit = state; });
-
- f9334_device &outlatch(F9334(config, "outlatch")); // IC26
- outlatch.q_out_cb<0>().set(FUNC(cd2650_state::tape_deck_on_w)); // TD ON
- outlatch.q_out_cb<7>().set("beeper", FUNC(beep_device::set_state)); // OUT6
- // Q1-Q7 = OUT 0-6, not defined in RE
- // The connection of OUT6 to a 700-1200 Hz noise generator is suggested
- // in Central Data 2650 Newsletter, Volume 1, Issue 3 for use with the
- // "Morse Code" program by Mike Durham.
-
- /* video hardware */
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_raw(XTAL(14'192'640), 112 * CHARACTER_WIDTH, 0, 80 * CHARACTER_WIDTH, 22 * CHARACTER_LINES, 0, 16 * CHARACTER_LINES);
- screen.set_screen_update(FUNC(cd2650_state::screen_update));
- screen.set_palette("palette");
-
- GFXDECODE(config, "gfxdecode", "palette", gfx_cd2650);
- PALETTE(config, "palette", palette_device::MONOCHROME);
-
- /* quickload */
- QUICKLOAD(config, "quickload", "pgm", attotime::from_seconds(1)).set_load_callback(FUNC(cd2650_state::quickload_cb));
-
- /* Sound */
- SPEAKER(config, "mono").front_center();
- BEEP(config, "beeper", 950).add_route(ALL_OUTPUTS, "mono", 0.50); // guess
-
- /* Devices */
- generic_keyboard_device &keyboard(GENERIC_KEYBOARD(config, "keyboard", 0));
- keyboard.set_keyboard_callback(FUNC(cd2650_state::kbd_put));
- CASSETTE(config, m_cass);
- m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.15);
- TIMER(config, "kansas_w").configure_periodic(FUNC(cd2650_state::kansas_w), attotime::from_hz(4800));
- TIMER(config, "kansas_r").configure_periodic(FUNC(cd2650_state::kansas_r), attotime::from_hz(40000));
-}
-
-/* ROM definition */
-ROM_START( cd2650 )
- ROM_REGION( 0x1000, "roms", 0 )
- ROM_LOAD( "cd2650.rom", 0x0000, 0x0400, CRC(5397328e) SHA1(7106fdb60e1ad2bc5e8e45527f348c23296e8d6a))
-
- ROM_REGION( 0x0600, "chargen", 0 )
- ROM_LOAD( "char.rom", 0x0000, 0x0200, CRC(9b75db2a) SHA1(4367c01afa503d7cba0c38078fde0b95392c6c2c))
- ROM_LOAD_OPTIONAL( "char2.rom", 0x0200, 0x0400, CRC(b450eea8) SHA1(c1bdba52c2dc5698cad03b6b884b942a083465ed)) // not used
-
- // various unused roms found on Amigan site
- ROM_REGION( 0xc900, "user1", 0 )
- ROM_LOAD_OPTIONAL( "01a_cd_boots.bin", 0x0000, 0x0200, CRC(5336c62f) SHA1(e94cf7be01ea806ff7c7b90aee1a4e88f4f1ba9f))
- ROM_LOAD_OPTIONAL( "01a_cd_dos.bin", 0x0200, 0x2000, CRC(3f177cdd) SHA1(01afd77ad2f065158cbe032aa26682cb20afe7d8))
- ROM_LOAD_OPTIONAL( "01a_cd_pop.bin", 0x2200, 0x1000, CRC(d8f44f11) SHA1(605ab5a045290fa5b99ff4fc8fbfa2a3f202578f))
- ROM_LOAD_OPTIONAL( "01b_cd_alp.bin", 0x3200, 0x2a00, CRC(b05568bb) SHA1(29e74633c0cd731c0be25313288cfffdae374236))
- ROM_LOAD_OPTIONAL( "01b_cd_basic.bin", 0x5c00, 0x3b00, CRC(0cf1e3d8) SHA1(3421e679c238aeea49cd170b34a6f344da4770a6))
- ROM_LOAD_OPTIONAL( "01b_cd_mon_m.bin", 0x9700, 0x0400, CRC(f6f19c08) SHA1(1984d85d57fc2a6c5a3bd51fbc58540d7129a0ae))
- ROM_LOAD_OPTIONAL( "01b_cd_mon_o.bin", 0x9b00, 0x0400, CRC(9d40b4dc) SHA1(35cffcbd983b7b37c878a15af44100568d0659d1))
- ROM_LOAD_OPTIONAL( "02b_cd_alp.bin", 0x9f00, 0x2a00, CRC(a66b7f32) SHA1(2588f9244b0ec6b861dcebe666d37d3fa88dd043))
-ROM_END
-
-/* Driver */
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1977, cd2650, 0, 0, cd2650, cd2650, cd2650_state, empty_init, "Central Data", "2650 Computer System", MACHINE_SUPPORTS_SAVE )