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+// license:GPL-2.0+
+// copyright-holders:Kevin Thacker
+/***************************************************************************
+
+ NOTE: ****** Specbusy: press N, R, or E to boot *************
+
+
+ Spectrum/Inves/TK90X etc. memory map:
+
+ CPU:
+ 0000-3fff ROM
+ 4000-ffff RAM
+
+ Spectrum 128/+2/+2a/+3 memory map:
+
+ CPU:
+ 0000-3fff Banked ROM/RAM (banked rom only on 128/+2)
+ 4000-7fff Banked RAM
+ 8000-bfff Banked RAM
+ c000-ffff Banked RAM
+
+ TS2068 memory map: (Can't have both EXROM and DOCK active)
+ The 8K EXROM can be loaded into multiple pages.
+
+ CPU:
+ 0000-1fff ROM / EXROM / DOCK (Cartridge)
+ 2000-3fff ROM / EXROM / DOCK
+ 4000-5fff \
+ 6000-7fff \
+ 8000-9fff |- RAM / EXROM / DOCK
+ a000-bfff |
+ c000-dfff /
+ e000-ffff /
+
+
+Interrupts:
+
+Changes:
+
+29/1/2000 KT - Implemented initial +3 emulation.
+30/1/2000 KT - Improved input port decoding for reading and therefore
+ correct keyboard handling for Spectrum and +3.
+31/1/2000 KT - Implemented buzzer sound for Spectrum and +3.
+ Implementation copied from Paul Daniel's Jupiter driver.
+ Fixed screen display problems with dirty chars.
+ Added support to load .Z80 snapshots. 48k support so far.
+13/2/2000 KT - Added Interface II, Kempston, Fuller and Mikrogen
+ joystick support.
+17/2/2000 DJR - Added full key descriptions and Spectrum+ keys.
+ Fixed Spectrum +3 keyboard problems.
+17/2/2000 KT - Added tape loading from WAV/Changed from DAC to generic
+ speaker code.
+18/2/2000 KT - Added tape saving to WAV.
+27/2/2000 KT - Took DJR's changes and added my changes.
+27/2/2000 KT - Added disk image support to Spectrum +3 driver.
+27/2/2000 KT - Added joystick I/O code to the Spectrum +3 I/O handler.
+14/3/2000 DJR - Tape handling dipswitch.
+26/3/2000 DJR - Snapshot files are now classifed as snapshots not
+ cartridges.
+04/4/2000 DJR - Spectrum 128 / +2 Support.
+13/4/2000 DJR - +4 Support (unofficial 48K hack).
+13/4/2000 DJR - +2a Support (rom also used in +3 models).
+13/4/2000 DJR - TK90X, TK95 and Inves support (48K clones).
+21/4/2000 DJR - TS2068 and TC2048 support (TC2048 Supports extra video
+ modes but doesn't have bank switching or sound chip).
+09/5/2000 DJR - Spectrum +2 (France, Spain), +3 (Spain).
+17/5/2000 DJR - Dipswitch to enable/disable disk drives on +3 and clones.
+27/6/2000 DJR - Changed 128K/+3 port decoding (sound now works in Zub 128K).
+06/8/2000 DJR - Fixed +3 Floppy support
+10/2/2001 KT - Re-arranged code and split into each model emulated.
+ Code is split into 48k, 128k, +3, tc2048 and ts2048
+ segments. 128k uses some of the functions in 48k, +3
+ uses some functions in 128, and tc2048/ts2048 use some
+ of the functions in 48k. The code has been arranged so
+ these functions come in some kind of "override" order,
+ read functions changed to use READ8_HANDLER and write
+ functions changed to use WRITE8_HANDLER.
+ Added Scorpion256 preliminary.
+18/6/2001 DJR - Added support for Interface 2 cartridges.
+xx/xx/2001 KS - TS-2068 sound fixed.
+ Added support for DOCK cartridges for TS-2068.
+ Added Spectrum 48k Psycho modified rom driver.
+ Added UK-2086 driver.
+23/12/2001 KS - 48k machines are now able to run code in screen memory.
+ Programs which keep their code in screen memory
+ like monitors, tape copiers, decrunchers, etc.
+ works now.
+ Fixed problem with interrupt vector set to 0xffff (much
+ more 128k games works now).
+ A useful used trick on the Spectrum is to set
+ interrupt vector to 0xffff (using the table
+ which contain 0xff's) and put a byte 0x18 hex,
+ the opcode for JR, at this address. The first
+ byte of the ROM is a 0xf3 (DI), so the JR will
+ jump to 0xfff4, where a long JP to the actual
+ interrupt routine is put. Due to unideal
+ bankswitching in MAME this JP were to 0001 what
+ causes Spectrum to reset. Fixing this problem
+ made much more software runing (i.e. Paperboy).
+ Corrected frames per second value for 48k and 128k
+ Sinclair machines.
+ There are 50.08 frames per second for Spectrum
+ 48k what gives 69888 cycles for each frame and
+ 50.021 for Spectrum 128/+2/+2A/+3 what gives
+ 70908 cycles for each frame.
+ Remapped some Spectrum+ keys.
+ Pressing F3 to reset was seting 0xf7 on keyboard
+ input port. Problem occurred for snapshots of
+ some programms where it was readed as pressing
+ key 4 (which is exit in Tapecopy by R. Dannhoefer
+ for example).
+ Added support to load .SP snapshots.
+ Added .BLK tape images support.
+ .BLK files are identical to .TAP ones, extension
+ is an only difference.
+08/03/2002 KS - #FF port emulation added.
+ Arkanoid works now, but is not playable due to
+ completly messed timings.
+
+Initialisation values used when determining which model is being emulated:
+ 48K Spectrum doesn't use either port.
+ 128K/+2 Bank switches with port 7ffd only.
+ +3/+2a Bank switches with both ports.
+
+Notes:
+ 1. No contented memory.
+ 2. No hi-res colour effects (need contended memory first for accurate timing).
+ 3. Multiface 1 and Interface 1 not supported.
+ 4. Horace and the Spiders cartridge doesn't run properly.
+ 5. Tape images not supported:
+ .TZX, .SPC, .ITM, .PAN, .TAP(Warajevo), .VOC, .ZXS.
+ 6. Snapshot images not supported:
+ .ACH, .PRG, .RAW, .SEM, .SIT, .SNX, .ZX, .ZXS, .ZX82.
+ 7. 128K emulation is not perfect - the 128K machines crash and hang while
+ running quite a lot of games.
+ 8. Disk errors occur on some +3 games.
+ 9. Video hardware of all machines is timed incorrectly.
+10. EXROM and HOME cartridges are not emulated.
+11. The TK90X and TK95 roms output 0 to port #df on start up.
+12. The purpose of this port is unknown (probably display mode as TS2068) and
+ thus is not emulated.
+
+Very detailed infos about the ZX Spectrum +3e can be found at
+
+http://www.z88forever.org.uk/zxplus3e/
+
+
+The hc2000 corrupts its memory, especially if you type something, and the
+resulting mess can be seen in the F4 viewer display.
+
+*******************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "includes/spectrum.h"
+#include "imagedev/snapquik.h"
+#include "imagedev/cassette.h"
+#include "sound/ay8910.h"
+#include "sound/speaker.h"
+#include "formats/tzx_cas.h"
+#include "machine/ram.h"
+
+/****************************************************************************************************/
+/* Spectrum 128 specific functions */
+
+WRITE8_MEMBER(spectrum_state::spectrum_128_port_7ffd_w)
+{
+ /* D0-D2: RAM page located at 0x0c000-0x0ffff */
+ /* D3 - Screen select (screen 0 in ram page 5, screen 1 in ram page 7 */
+ /* D4 - ROM select - which rom paged into 0x0000-0x03fff */
+ /* D5 - Disable paging */
+
+ /* disable paging? */
+ if (m_port_7ffd_data & 0x20)
+ return;
+
+ if ((m_port_7ffd_data ^ data) & 0x08)
+ spectrum_UpdateScreenBitmap();
+
+ /* store new state */
+ m_port_7ffd_data = data;
+
+ /* update memory */
+ spectrum_128_update_memory();
+}
+
+void spectrum_state::spectrum_128_update_memory()
+{
+ UINT8 *messram = m_ram->pointer();
+
+ /* select ram at 0x0c000-0x0ffff */
+ int ram_page = m_port_7ffd_data & 0x07;
+ unsigned char *ram_data = messram + (ram_page<<14);
+ membank("bank4")->set_base(ram_data);
+
+ if (BIT(m_port_7ffd_data, 3))
+ m_screen_location = messram + (7<<14);
+ else
+ m_screen_location = messram + (5<<14);
+
+ if (!m_cart->exists())
+ {
+ /* ROM switching */
+ int ROMSelection = BIT(m_port_7ffd_data, 4);
+
+ /* rom 0 is 128K rom, rom 1 is 48 BASIC */
+ unsigned char *ChosenROM = memregion("maincpu")->base() + 0x010000 + (ROMSelection << 14);
+
+ membank("bank1")->set_base(ChosenROM);
+ }
+}
+
+READ8_MEMBER( spectrum_state::spectrum_128_ula_r )
+{
+ int vpos = machine().first_screen()->vpos();
+
+ return vpos<193 ? m_screen_location[0x1800|(vpos&0xf8)<<2]:0xff;
+}
+
+static ADDRESS_MAP_START (spectrum_128_io, AS_IO, 8, spectrum_state )
+ AM_RANGE(0x0000, 0x0000) AM_READWRITE(spectrum_port_fe_r,spectrum_port_fe_w) AM_MIRROR(0xfffe) AM_MASK(0xffff)
+ AM_RANGE(0x001f, 0x001f) AM_READ(spectrum_port_1f_r) AM_MIRROR(0xff00)
+ AM_RANGE(0x007f, 0x007f) AM_READ(spectrum_port_7f_r) AM_MIRROR(0xff00)
+ AM_RANGE(0x00df, 0x00df) AM_READ(spectrum_port_df_r) AM_MIRROR(0xff00)
+ AM_RANGE(0x0000, 0x0000) AM_WRITE(spectrum_128_port_7ffd_w) AM_MIRROR(0x7ffd) // (A15 | A1) == 0, note: reading from this port does write to it by value from data bus
+ AM_RANGE(0x8000, 0x8000) AM_DEVWRITE("ay8912", ay8910_device, data_w) AM_MIRROR(0x3ffd)
+ AM_RANGE(0xc000, 0xc000) AM_DEVREADWRITE("ay8912", ay8910_device, data_r, address_w) AM_MIRROR(0x3ffd)
+ AM_RANGE(0x0001, 0x0001) AM_READ(spectrum_128_ula_r) AM_MIRROR(0xfffe)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START (spectrum_128_mem, AS_PROGRAM, 8, spectrum_state )
+ AM_RANGE( 0x0000, 0x3fff) AM_ROMBANK("bank1") // don't use RAMBANK here otherwise programs can erase the ROM(!)
+ AM_RANGE( 0x4000, 0x7fff) AM_RAMBANK("bank2")
+ AM_RANGE( 0x8000, 0xbfff) AM_RAMBANK("bank3")
+ AM_RANGE( 0xc000, 0xffff) AM_RAMBANK("bank4")
+ADDRESS_MAP_END
+
+MACHINE_RESET_MEMBER(spectrum_state,spectrum_128)
+{
+ UINT8 *messram = m_ram->pointer();
+
+ memset(messram,0,128*1024);
+ /* 0x0000-0x3fff always holds ROM */
+
+ /* Bank 5 is always in 0x4000 - 0x7fff */
+ membank("bank2")->set_base(messram + (5<<14));
+
+ /* Bank 2 is always in 0x8000 - 0xbfff */
+ membank("bank3")->set_base(messram + (2<<14));
+
+ MACHINE_RESET_CALL_MEMBER(spectrum);
+
+ /* set initial ram config */
+ m_port_7ffd_data = 0;
+ m_port_1ffd_data = -1;
+ spectrum_128_update_memory();
+}
+
+/* F4 Character Displayer */
+static const gfx_layout spectrum_charlayout =
+{
+ 8, 8, /* 8 x 8 characters */
+ 96, /* 96 characters */
+ 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( spec128 )
+ GFXDECODE_ENTRY( "maincpu", 0x17d00, spectrum_charlayout, 0, 8 )
+GFXDECODE_END
+
+
+MACHINE_CONFIG_DERIVED( spectrum_128, spectrum )
+
+ MCFG_DEVICE_REMOVE("maincpu")
+
+ MCFG_CPU_ADD("maincpu", Z80, X1_128_SINCLAIR / 5)
+ MCFG_CPU_PROGRAM_MAP(spectrum_128_mem)
+ MCFG_CPU_IO_MAP(spectrum_128_io)
+ MCFG_CPU_VBLANK_INT_DRIVER("screen", spectrum_state, spec_interrupt)
+ MCFG_QUANTUM_TIME(attotime::from_hz(60))
+
+ MCFG_MACHINE_RESET_OVERRIDE(spectrum_state, spectrum_128 )
+
+ /* video hardware */
+ MCFG_SCREEN_MODIFY("screen")
+ MCFG_SCREEN_RAW_PARAMS(X1_128_SINCLAIR / 2.5f, 456, 0, 352, 311, 0, 296)
+
+ MCFG_VIDEO_START_OVERRIDE(spectrum_state, spectrum_128 )
+ MCFG_GFXDECODE_MODIFY("gfxdecode", spec128)
+
+ /* sound hardware */
+ MCFG_SOUND_ADD("ay8912", AY8912, 1773400)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+
+ /* internal ram */
+ MCFG_RAM_MODIFY(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("128K")
+MACHINE_CONFIG_END
+
+
+
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+
+ROM_START(spec128)
+ ROM_REGION(0x18000,"maincpu",0)
+ ROM_SYSTEM_BIOS( 0, "en", "English" )
+ ROMX_LOAD("zx128_0.rom",0x10000,0x4000, CRC(e76799d2) SHA1(4f4b11ec22326280bdb96e3baf9db4b4cb1d02c5), ROM_BIOS(1))
+ ROMX_LOAD("zx128_1.rom",0x14000,0x4000, CRC(b96a36be) SHA1(80080644289ed93d71a1103992a154cc9802b2fa), ROM_BIOS(1))
+ ROM_SYSTEM_BIOS( 1, "sp", "Spanish" )
+ ROMX_LOAD("zx128s0.rom",0x10000,0x4000, CRC(453d86b2) SHA1(968937b1c750f0ef6205f01c6db4148da4cca4e3), ROM_BIOS(2))
+ ROMX_LOAD("zx128s1.rom",0x14000,0x4000, CRC(6010e796) SHA1(bea3f397cc705eafee995ea629f4a82550562f90), ROM_BIOS(2))
+ROM_END
+
+ROM_START(specpls2)
+ ROM_REGION(0x18000,"maincpu",0)
+ ROM_SYSTEM_BIOS( 0, "en", "English" )
+ ROMX_LOAD("zxp2_0.rom",0x10000,0x4000, CRC(5d2e8c66) SHA1(72703f9a3e734f3c23ec34c0727aae4ccbef9a91), ROM_BIOS(1))
+ ROMX_LOAD("zxp2_1.rom",0x14000,0x4000, CRC(98b1320b) SHA1(de8b0d2d0379cfe7c39322a086ca6da68c7f23cb), ROM_BIOS(1))
+ ROM_SYSTEM_BIOS( 1, "fr", "French" )
+ ROMX_LOAD("plus2fr0.rom",0x10000,0x4000, CRC(c684c535) SHA1(56684c4c85a616e726a50707483b9a42d8e724ed), ROM_BIOS(2))
+ ROMX_LOAD("plus2fr1.rom",0x14000,0x4000, CRC(f5e509c5) SHA1(7e398f62689c9d90a36d3a101351ec9987207308), ROM_BIOS(2))
+ ROM_SYSTEM_BIOS( 2, "sp", "Spanish" )
+ ROMX_LOAD("plus2sp0.rom",0x10000,0x4000, CRC(e807d06e) SHA1(8259241b28ff85441f1bedc2bee53445767c51c5), ROM_BIOS(3))
+ ROMX_LOAD("plus2sp1.rom",0x14000,0x4000, CRC(41981d4b) SHA1(ec0d5a158842d20601b4fbeaefc6668db979d0e1), ROM_BIOS(3))
+ ROM_SYSTEM_BIOS( 3, "ao", "ZX Spectrum +2c (Andrew Owen)" )
+ ROMX_LOAD("plus2c-0.rom",0x10000,0x4000, CRC(bfddf748) SHA1(3eba870bcb2c5efa906f2ca3febe960fc35d66bb), ROM_BIOS(4))
+ ROMX_LOAD("plus2c-1.rom",0x14000,0x4000, CRC(fd8552b6) SHA1(5ffcf79f2154ba2cf42cc1d9cb4be93cb5043e73), ROM_BIOS(4))
+ ROM_SYSTEM_BIOS( 4, "namco", "ZX Spectrum +2c (Namco)" )
+ ROMX_LOAD("pl2namco.rom",0x10000,0x8000, CRC(72a54e75) SHA1(311400157df689450dadc3620f4c4afa960b05ad), ROM_BIOS(5))
+ROM_END
+
+ROM_START(hc128)
+ ROM_REGION(0x18000,"maincpu",0)
+ ROM_LOAD("zx128_0.rom",0x10000,0x4000, CRC(e76799d2) SHA1(4f4b11ec22326280bdb96e3baf9db4b4cb1d02c5))
+ ROM_LOAD("hc128.rom", 0x14000,0x4000, CRC(0241e960) SHA1(cea0d14391b9e571460a816088a1c00ecb24afa3))
+ROM_END
+
+ROM_START(hc2000)
+ ROM_REGION(0x18000,"maincpu",0)
+ ROM_SYSTEM_BIOS( 0, "v1", "Version 1" )
+ ROMX_LOAD("zx128_0.rom",0x10000,0x4000, CRC(e76799d2) SHA1(4f4b11ec22326280bdb96e3baf9db4b4cb1d02c5), ROM_BIOS(1))
+ ROMX_LOAD("hc2000.v1", 0x14000,0x4000, CRC(453c1a5a) SHA1(f8139fc38478691cf44944dc83fd6e70b0f002fb), ROM_BIOS(1))
+ ROM_SYSTEM_BIOS( 1, "v2", "Version 2" )
+ ROMX_LOAD("zx128_0.rom",0x10000,0x4000, CRC(e76799d2) SHA1(4f4b11ec22326280bdb96e3baf9db4b4cb1d02c5), ROM_BIOS(2))
+ ROMX_LOAD("hc2000.v2", 0x14000,0x4000, CRC(65d90464) SHA1(5e2096e6460ff2120c8ada97579fdf82c1199c09), ROM_BIOS(2))
+ROM_END
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
+COMP( 1986, spec128, 0, 0, spectrum_128, spec_plus, driver_device, 0, "Sinclair Research Ltd", "ZX Spectrum 128" , 0 )
+COMP( 1986, specpls2, spec128, 0, spectrum_128, spec_plus, driver_device, 0, "Amstrad plc", "ZX Spectrum +2" , 0 )
+COMP( 1991, hc128, spec128, 0, spectrum_128, spec_plus, driver_device, 0, "ICE-Felix", "HC-128" , 0 )
+COMP( 1992, hc2000, spec128, 0, spectrum_128, spec_plus, driver_device, 0, "ICE-Felix", "HC-2000" , MACHINE_NOT_WORKING )