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-// license:BSD-3-Clause
-// copyright-holders:Wilbert Pol,Gabriele D'Antona
-/*
-
-Research Machines 380Z (aka "RML 380Z" or "RM 380Z")
-Microcomputer produced by Research Machines Limited, Oxford, UK
-1978-1985
-MESS driver by Wilbert Pol and friol (dantonag (at) gmail.com)
-Driver started on 22/12/2011
-
-Stefano Bodrato, 09/12/2016 - skeleton for cassette support
-True tape samples are needed to continue !
-
-===
-
-From the Firmware Manual:
-
-List of known firmware revisions by sign-on message:
-*** RM380Z ***
-COS 3.0/C
-COS 3.0/F
-COS 3.0/M
-COS 3.4C/C
-COS 3.4C/F
-COS 3.4C/M
-COS 3.4D/C
-COS 3.4D/M
-COS 3.4E/F
-COS 4.0/F
-COS 4.0A/F
-COS 4.0A/M
-COS 4.0B/M
-COS 4.2 A
-
-/C = Cassette
-/F = 8 inch single density floppy
-/M = 5.25 inch single density floppy
-Ver 4.2 can have either floppy type
-
-*** RM480Z ***
-RML 40-Character LINK 480Z V1.0
-RML 80-Character LINK 480Z V1.0
-RML 40-Character LINK 480Z V1.1 A
-RML 40-Character LINK 480Z V1.1 B
-RML 80-Character LINK 480Z V1.1 A
-RML 80-Character LINK 480Z V1.1 B
-RML 80-Character LINK 480Z V1.2 A
-RML 80-Character LINK 480Z V1.2 B
-RML 80-Character LINK 480Z V1.2 C
-RML 80-Character LINK 480Z V1.2 D
-RML 80-Character LINK 480Z V2.2 B
-
-V1.0 refers to ROS 1.0
-V1.1 refers to ROS 1.1
-V1.2 refers to ROS 1.2
-V2.2 refers to ROS 2.2
-
-Monitor commands:
-B - Boot CP/M (COS /F, COS /M, ROS 1.2, ROS 2.2)
-X - Boot CP/M from another drive (as above)
-N - Boot network (ROS)
-T - Enter terminal mode (ROS)
-L - Load program from cassette (COS /C, ROS)
-D - Dump memory to cassette (as above)
-C - Continue program at restart address (as above)
-J - Go to address
-O - Select printer option (and cassette speed for COS /C, ROS)
-M - Enable HRG board as memory (COS 3.4, COS 4.0)
-W - Select 40 or 80 characters per line (All 80-column machines)
-R - Start ROM BASIC (ROS 1.1, ROS 1.2, ROS 2.2)
-Ctrl+Shift+8 - Break and return to current OS (ROS)
-Ctrl+Shift+9 - Break and return to front panel (ROS)
-Ctrl+F - Enter Front Panel (=the debugger)
-Ctrl+T - Enter Typewriter mode
-Ctrl+S - Autopaging on
-Ctrl+Q - Autopaging off
-Ctrl+A - Toggle autopaging
-
-Graphics characters: These are low-res (2x3 TRS80-style) from 80-BF, repeated at C0-FF.
-80-BF will be low-intensity, except for a RM480Z if using a colour monitor.
-The characters 00-1F have one set for COS 3.4 and COS 4.0, and a different set for the others.
-COS 4.0 and 4.2 allow one to redefine the 80-FF character range, and to have attributes.
-ROS 2.2 allows an alternate character set.
-
-Sound:
-RM380Z has a connector for a speaker
-RM480Z has the speaker fitted
-
-===
-
-Memory map from sevice manual:
-
-PAGE SEL bit in PORT0 set to 0:
-
- 0000-3BFF - CPU RAM row 1 (15KB!)
- 3C00-7BFF - CPU RAM row 2 (16KB)
- 7C00-BBFF - Add-on RAM row 1 or HRG RAM (16KB)
- BC00-DFFF - Add-on RAM row 2 (9KB!)
- E000-EFFF - ROM (COS)
- F000-F5FF - VDU and HRG Video RAM
- F600-F9FF - ROM (monitor extension)
- FA00-FAFF - Reserved, RAM?
- FB00-FBFF - Memory-mapped ports (FBFC-FBFF)
- FC00-FFFF - RAM
-
-PAGE SEL bit in PORT0 set to 1:
- 0000-0FFF - ROM (COS mirror from E000)
- 1B00-1BFF - Memory-mapped ports (1BFC-1BFF)
- 1C00-1DFF - ROM
- 4000-7FFF - CPU RAM row 1 (16KB!, this RAM normally appears at 0000)
- 8000-BFFF - ???
- C000-DFFF - ???
- E000-EFFF - ROM (COS)
- F000-F5FF - VDU and HRG Video RAM
- F600-F9FF - ROM (monitor extension)
- FA00-FAFF - Reserved, RAM?
- FB00-FBFF - Memory-mapped ports (FBFC-FBFF)
- FC00-FFFF - RAM
-
-Video resolution (not confirmed):
-80x24 - 6 pixels wide (5 + spacing), 10 pixels high (9 + spacing) = 480x240
-Video input clock is 16MHz
-
-According to the manuals, VDU-1 chargen is Texas 74LS262.
-
-===
-
-Notes on COS 4.0 disassembly:
-
-- routine at 0xe438 is called at startup in COS 4.0 and it sets the RST vectors in RAM
-- routine at 0xe487 finds "top" of system RAM and stores it in 0x0006 and 0x000E
-- 0xeca0 - outputs a string (null terminated) to screen (?)
-- 0xff18 - does char output to screen (char in A?)
-
-===
-
-TODO:
-
-- Properly implement "backwards" or "last 4 lines" scrolling
-- Properly implement dimming and graphic chars (>0x80)
-- Understand why any write to disk command fails with "bad sector"
-- Understand why ctrl-U (blinking cursor) in COS 4.0 stops keyboard input from working
-- Get a reliable ROM dump and charset ROM dump
-
-
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_param
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_enabled
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_period.attoseconds
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_period.seconds
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_start.attoseconds
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_start.seconds
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_expire.attoseconds
-Attempt to register save state entry after state registration is closed!
-Module timer tag static_vblank_timer name m_expire.seconds
-':maincpu' (E48B): unmapped program memory write to E000 = C1 & FF
-':maincpu' (E48E): unmapped program memory write to E000 = 3E & FF
-
-*/
-
-
-#include "emu.h"
-#include "includes/rm380z.h"
-#include "speaker.h"
-
-#include "emupal.h"
-#include "screen.h"
-
-
-void rm380z_state::rm380z_mem(address_map &map)
-{
- map(0xe000, 0xefff).rom().region(RM380Z_MAINCPU_TAG, 0);
- map(0xf000, 0xf5ff).rw(FUNC(rm380z_state::videoram_read), FUNC(rm380z_state::videoram_write));
- map(0xf600, 0xf9ff).rom().region(RM380Z_MAINCPU_TAG, 0x1000); /* Extra ROM space for COS4.0 */
- map(0xfa00, 0xfaff).ram();
- map(0xfb00, 0xfbff).rw(FUNC(rm380z_state::port_read), FUNC(rm380z_state::port_write));
- map(0xfc00, 0xffff).rw(FUNC(rm380z_state::hiram_read), FUNC(rm380z_state::hiram_write));
-}
-
-void rm380z_state::rm380z_io(address_map &map)
-{
- map.global_mask(0xff);
- map(0x00, 0xbf).rw(FUNC(rm380z_state::rm380z_portlow_r), FUNC(rm380z_state::rm380z_portlow_w));
- map(0xc0, 0xc3).rw(m_fdc, FUNC(fd1771_device::read), FUNC(fd1771_device::write));
- map(0xc4, 0xc4).w(FUNC(rm380z_state::disk_0_control));
- map(0xc5, 0xff).rw(FUNC(rm380z_state::rm380z_porthi_r), FUNC(rm380z_state::rm380z_porthi_w));
-}
-
-void rm380z_state::rm480z_mem(address_map &map)
-{
- map(0x0000, 0xe7ff).ram();
- map(0xe800, 0xf7ff).rom().region(RM380Z_MAINCPU_TAG, 0);
- map(0xf800, 0xffff).ram();
-}
-
-void rm380z_state::rm480z_io(address_map &map)
-{
- //map(0x00, 0x17).ram(); // videoram
- //map(0x18, 0x18).mirror(0xff00); // control port 0
- //map(0x19, 0x19).mirror(0xff00); // control port 1
- //map(0x1a, 0x1a).mirror(0xff00); // control port 2
- //map(0x1b, 0x1b).mirror(0xff00); // control port 3 (DAC) // option
- //map(0x1d, 0x1d).mirror(0xff00); // control port 5 (USERIO) // option
- //map(0x20, 0x23).mirror(0xff00); // system CTC - 0=SIO4&cassin, 1=SIO2&cassio, 2=keybd int, 3=50hz int for repeat key
- //map(0x24, 0x27).mirror(0xff00); // system SIO - 0=chA network data, 1=chB SIO4 data, 2=ChA control, 3=ChB control
- //map(0x28, 0x29).mirror(0xff02); // am9511/am9512 maths chip // option
- //map(0x2c, 0x2f).mirror(0xff00); // z80ctc IEEE int, Maths int, RTC, RTC // option
- //map(0x30, 0x37).mirror(0xff00); // IEEE chip // option
- //map(0x38, 0x3b).mirror(0xff00); // Hi-res graphics option
-}
-
-INPUT_PORTS_START( rm380z )
-// PORT_START("additional_chars")
-// PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Escape") PORT_CODE(KEYCODE_ESC) PORT_CODE(KEYCODE_ESC)
-INPUT_PORTS_END
-
-//
-//
-//
-
-static void rm380z_floppies(device_slot_interface &device)
-{
- device.option_add("sssd", FLOPPY_525_SSSD);
-}
-
-uint32_t rm380z_state::screen_update_rm380z(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
- update_screen(bitmap);
- return 0;
-}
-
-void rm380z_state::rm380z(machine_config &config)
-{
- /* basic machine hardware */
- Z80(config, m_maincpu, 16_MHz_XTAL / 4);
- m_maincpu->set_addrmap(AS_PROGRAM, &rm380z_state::rm380z_mem);
- m_maincpu->set_addrmap(AS_IO, &rm380z_state::rm380z_io);
-
- /* video hardware */
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_refresh_hz(50);
- screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
- // according to videos and pictures of the real hardware, chars are spaced of at least 1 pixel
- // and there is at least 1 pixel between each row of characters
- screen.set_size((RM380Z_SCREENCOLS*(RM380Z_CHDIMX+1)), (RM380Z_SCREENROWS*(RM380Z_CHDIMY+1)));
- screen.set_visarea(0, (RM380Z_SCREENCOLS*(RM380Z_CHDIMX+1))-1, 0, (RM380Z_SCREENROWS*(RM380Z_CHDIMY+1))-1);
- screen.set_screen_update(FUNC(rm380z_state::screen_update_rm380z));
- screen.set_palette("palette");
-
- PALETTE(config, "palette", palette_device::MONOCHROME);
-
- SPEAKER(config, "mono").front_center();
-
- /* cassette */
- CASSETTE(config, m_cassette);
-// m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
- m_cassette->set_default_state(CASSETTE_PLAY | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
- m_cassette->add_route(ALL_OUTPUTS, "mono", 0.05);
-
- /* RAM configurations */
- RAM(config, RAM_TAG).set_default_size("56K");
-
- /* floppy disk */
- FD1771(config, m_fdc, 1_MHz_XTAL);
-
- FLOPPY_CONNECTOR(config, "wd1771:0", rm380z_floppies, "sssd", floppy_image_device::default_floppy_formats);
- FLOPPY_CONNECTOR(config, "wd1771:1", rm380z_floppies, "sssd", floppy_image_device::default_floppy_formats);
-
- /* keyboard */
- generic_keyboard_device &keyboard(GENERIC_KEYBOARD(config, "keyboard", 0));
- keyboard.set_keyboard_callback(FUNC(rm380z_state::keyboard_put));
-}
-
-void rm380z_state::rm480z(machine_config &config)
-{
- /* basic machine hardware */
- Z80(config, m_maincpu, 16_MHz_XTAL / 4);
- m_maincpu->set_addrmap(AS_PROGRAM, &rm380z_state::rm480z_mem);
- m_maincpu->set_addrmap(AS_IO, &rm380z_state::rm480z_io);
-
- MCFG_MACHINE_RESET_OVERRIDE(rm380z_state, rm480z)
- /* video hardware */
-// screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
-// screen.set_refresh_hz(50);
-// screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
-// screen.set_size((RM380Z_SCREENCOLS*(RM380Z_CHDIMX+1)), (RM380Z_SCREENROWS*(RM380Z_CHDIMY+1)));
-// screen.set_visarea(0, (RM380Z_SCREENCOLS*(RM380Z_CHDIMX+1))-1, 0, (RM380Z_SCREENROWS*(RM380Z_CHDIMY+1))-1);
-// screen.set_screen_update(FUNC(rm380z_state::screen_update_rm480z));
-// screen.set_palette("palette");
-
-// PALETTE(config, "palette", palette_device::MONOCHROME);
-
- /* keyboard */
-// generic_keyboard_device &keyboard(GENERIC_KEYBOARD(config, "keyboard", 0));
-// keyboard.set_keyboard_callback(FUNC(rm380z_state::keyboard_put));
-}
-
-
-/* ROM definitions */
-
-ROM_START( rm380z34d ) // COS 3.4D/F
- ROM_REGION( 0x10000, RM380Z_MAINCPU_TAG, 0 )
- ROM_LOAD( "cos34d-f.bin", 0x0000, 0x1000, CRC(eb128b40) SHA1(c46f358fb76459987e41750d052995563f2f7d53))
- // chargen ROM is undumped, afaik
- ROM_REGION( 0x1680, "chargen", 0 )
- ROM_LOAD( "ch3.raw", 0x0000, 0x1680, BAD_DUMP CRC(c223622b) SHA1(185ef24896419d7ff46f71a760ac217de3811684))
-ROM_END
-
-ROM_START( rm380z34e ) // COS 3.4E/M
- ROM_REGION( 0x10000, RM380Z_MAINCPU_TAG, 0 )
- ROM_LOAD( "cos34e-m.bin", 0x0000, 0x1000, CRC(20e2ddf4) SHA1(3177b28793d5a348c94fd0ae6393d74e2e9a8662))
- // chargen ROM is undumped, afaik
- ROM_REGION( 0x1680, "chargen", 0 )
- ROM_LOAD( "ch3.raw", 0x0000, 0x1680, BAD_DUMP CRC(c223622b) SHA1(185ef24896419d7ff46f71a760ac217de3811684))
-ROM_END
-
-ROM_START( rm380z ) // COS 4.0B/M
- ROM_REGION( 0x10000, RM380Z_MAINCPU_TAG, 0 )
- // I'm not sure of how those roms have been dumped. I don't know if those are good dumps or not.
- ROM_LOAD( "cos40b-m.bin", 0x0000, 0x1000, BAD_DUMP CRC(1f0b3a5c) SHA1(0b29cb2a3b7eaa3770b34f08c4fd42844f42700f))
- ROM_LOAD( "cos40b-m_f600-f9ff.bin", 0x1000, 0x400, BAD_DUMP CRC(e3397d9d) SHA1(490a0c834b0da392daf782edc7d51ca8f0668b1a))
- ROM_LOAD( "cos40b-m_1c00-1dff.bin", 0x1400, 0x200, BAD_DUMP CRC(0f759f44) SHA1(9689c1c1faa62c56def999cbedbbb0c8d928dcff))
- // chargen ROM is undumped, afaik
- ROM_REGION( 0x1680, "chargen", 0 )
- ROM_LOAD( "ch3.raw", 0x0000, 0x1680, BAD_DUMP CRC(c223622b) SHA1(185ef24896419d7ff46f71a760ac217de3811684))
-ROM_END
-
-// RM480Z is quite different, might be better off in its own driver
-ROM_START( rm480z )
- ROM_REGION( 0x10000, RM380Z_MAINCPU_TAG, 0 )
- ROM_LOAD( "fv2.0_0_12099_19.2.86.ic83", 0x0000, 0x4000, CRC(a0f02d8a) SHA1(1c063b842699dc0ad85a5a5f337f2864497f9c0f) )
- ROM_LOAD( "fv2.0_1_12100_27.2.86.ic93", 0x4000, 0x4000, CRC(2a93ca6e) SHA1(7fdd772d4251dbf951a687d184ed787cfe21212b) )
- ROM_REGION( 0x2000, "chargen", 0 )
- ROM_LOAD( "cg06_12098_28.2.86.ic98", 0x0000, 0x2000, CRC(15d40f7e) SHA1(a7266357eb9be849f77a97ff3013b236c0af8289) )
-ROM_END
-
-ROM_START( rm480za )
- ROM_REGION( 0x10000, RM380Z_MAINCPU_TAG, 0 )
- ROM_LOAD( "ros_1.2b.ls", 0x0000, 0x2000, CRC(37e93287) SHA1(c96d4b7eedadb0fb8e3732b6ba3e898e123c393f) )
- ROM_LOAD( "bir_5.4b_0.lt", 0x2000, 0x4000, CRC(64759792) SHA1(ffce5e59788cd492937e85b368b71e8a5a2aaa9c) )
- ROM_LOAD( "bir_5.4b_1.lu", 0x6000, 0x4000, CRC(adce35df) SHA1(dc20df0fcfefc5e2682b47e7ce454043dc593cd8) )
- ROM_LOAD( "bir_5.4b_2.lv", 0xa000, 0x4000, CRC(5a455fc8) SHA1(04c5f17120ee085c013e600b77ca63cbb138aa4d) )
- ROM_REGION( 0x10000, "user1", 0 ) // bioses for fdc board versions
- ROM_LOAD( "idc3-1i.rom", 0x0000, 0x2000, CRC(39e2cdf0) SHA1(ba523af357b61bbe6192727139850f36597d79f1) )
- ROM_LOAD( "idc5-1j.rom", 0x2000, 0x2000, CRC(d2ac27e2) SHA1(12d3966e0096c9bfb98135e15c3ddb37920cce15) )
- ROM_REGION( 0x2000, "chargen", 0 )
- ROM_LOAD( "cg06.lq", 0x0000, 0x2000, BAD_DUMP CRC(15d40f7e) SHA1(a7266357eb9be849f77a97ff3013b236c0af8289) ) // chip is marked CG05, might not be the same, so marked as bad
-ROM_END
-
-
-/* Driver */
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP(1978, rm380z, 0, 0, rm380z, rm380z, rm380z_state, init_rm380z, "Research Machines", "RM-380Z, COS 4.0B", MACHINE_NO_SOUND_HW)
-COMP(1978, rm380z34d, rm380z, 0, rm380z, rm380z, rm380z_state, init_rm380z34d, "Research Machines", "RM-380Z, COS 3.4D", MACHINE_NO_SOUND_HW)
-COMP(1978, rm380z34e, rm380z, 0, rm380z, rm380z, rm380z_state, init_rm380z34e, "Research Machines", "RM-380Z, COS 3.4E", MACHINE_NO_SOUND_HW)
-COMP(1981, rm480z, rm380z, 0, rm480z, rm380z, rm380z_state, init_rm380z34e, "Research Machines", "LINK RM-480Z (set 1)", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
-COMP(1981, rm480za, rm380z, 0, rm480z, rm380z, rm380z_state, init_rm380z34e, "Research Machines", "LINK RM-480Z (set 2)", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
-