New not-working machine: Mickrocomputer fuer Ausbildung [rfka01, Robbbert]

scripts/target/mame/mess.lua

@@ -3497,6 +3497,7 @@ files {
 	MAME_DIR .. "src/mame/drivers/m79152pc.cpp",
 	MAME_DIR .. "src/mame/drivers/mccpm.cpp",
 	MAME_DIR .. "src/mame/drivers/mes.cpp",
+	MAME_DIR .. "src/mame/drivers/mfabfz.cpp",
 	MAME_DIR .. "src/mame/drivers/mice.cpp",
 	MAME_DIR .. "src/mame/drivers/micral.cpp",
 	MAME_DIR .. "src/mame/drivers/micro20.cpp",

src/mame/drivers/mfabfz.cpp

@@ -0,0 +1,145 @@
+// license:BSD-3-Clause
+// copyright-holders:rfka01, Robbbert
+/***************************************************************************
+
+Mikrocomputer fuer Ausbildung
+Berufsfoerdungszentrum Essen
+Information found on Wikipedia:
+- System is a backbone upon which all functions are available on plug-in cards
+- 32k RAM, 32k ROM
+- Serial is via CPU SID/SOD pins, but can be replaced by 8251 on RS232 card
+- Protocol is COM1, 4800, 8N1
+- Timer card uses 8253
+- PIO card uses 8255 and has a printer interface
+- Cassette interface uses RS232 card
+- Optional floppy (both sizes); and a EPROM burner
+- OS: MAT85
+
+Manuals have no schematics and no mention of the 8253 or 8255. The bios
+doesn't try communicating with them either.
+
+Commands:
+A     Assembler
+B     Set Breakpoint
+D     Disassembler
+G     Go
+H     Help
+I     Inport
+M     Print/Modify memory (A=ascii, B=bit, H=hex)
+N     Turn on tracer & step to next instruction
+O     Outport
+P     Display memory contents in various formats
+R     Set initial register contents
+T     Trace interval
+
+Pressing enter will change the prompt from KMD > to KMD+> and pressing
+space will change it back.
+
+BIOS 0 uses the UART and works
+BIOS 1 uses SID/SOD and doesn't work
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/i8085/i8085.h"
+#include "machine/clock.h"
+#include "machine/i8251.h"
+#include "bus/rs232/rs232.h"
+
+
+class mfabfz_state : public driver_device
+{
+public:
+	mfabfz_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag)
+		, m_maincpu(*this, "maincpu")
+		, m_rs232(*this, "rs232")
+	{ }
+
+	DECLARE_WRITE_LINE_MEMBER(sod_w);
+	DECLARE_READ_LINE_MEMBER(sid_r);
+
+private:
+	virtual void machine_reset() override;
+	required_device<cpu_device> m_maincpu;
+	required_device<rs232_port_device> m_rs232;
+};
+
+
+WRITE_LINE_MEMBER( mfabfz_state::sod_w )
+{
+	m_rs232->write_txd(state);
+}
+
+READ_LINE_MEMBER( mfabfz_state::sid_r )
+{
+	return m_rs232->rxd_r();
+}
+
+
+static ADDRESS_MAP_START(mfabfz_mem, AS_PROGRAM, 8, mfabfz_state)
+	ADDRESS_MAP_UNMAP_HIGH
+	AM_RANGE(0x0000, 0x7fff) AM_ROM AM_REGION("roms", 0)
+	AM_RANGE(0x8000, 0xffff) AM_RAM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(mfabfz_io, AS_IO, 8, mfabfz_state)
+	ADDRESS_MAP_UNMAP_HIGH
+	ADDRESS_MAP_GLOBAL_MASK(0xff)
+	AM_RANGE(0xbe, 0xbe) AM_DEVREADWRITE("uart1", i8251_device, data_r, data_w)
+	AM_RANGE(0xbf, 0xbf) AM_DEVREADWRITE("uart1", i8251_device, status_r, control_w)
+	AM_RANGE(0xfe, 0xfe) AM_DEVREADWRITE("uart2", i8251_device, data_r, data_w)
+	AM_RANGE(0xff, 0xff) AM_DEVREADWRITE("uart2", i8251_device, status_r, control_w)
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( mfabfz )
+INPUT_PORTS_END
+
+
+void mfabfz_state::machine_reset()
+{
+}
+
+
+static MACHINE_CONFIG_START( mfabfz )
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu",I8085A, XTAL_4MHz / 2)
+	MCFG_CPU_PROGRAM_MAP(mfabfz_mem)
+	MCFG_CPU_IO_MAP(mfabfz_io)
+	MCFG_I8085A_SID(READLINE(mfabfz_state, sid_r))
+	MCFG_I8085A_SOD(WRITELINE(mfabfz_state, sod_w))
+	/* video hardware */
+
+	// uart1 - terminal - clock hardware unknown
+	MCFG_DEVICE_ADD("uart1_clock", CLOCK, 153600)
+	MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("uart1", i8251_device, write_txc))
+	MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("uart1", i8251_device, write_rxc))
+
+	MCFG_DEVICE_ADD("uart1", I8251, 0)
+	MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd))
+	MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
+	MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
+
+	MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
+	MCFG_RS232_RXD_HANDLER(DEVWRITELINE("uart1", i8251_device, write_rxd))
+	MCFG_RS232_DSR_HANDLER(DEVWRITELINE("uart1", i8251_device, write_dsr))
+	MCFG_RS232_CTS_HANDLER(DEVWRITELINE("uart1", i8251_device, write_cts))
+
+	// uart2 - cassette - clock comes from 2MHz through a divider consisting of 4 chips and some jumpers.
+	MCFG_DEVICE_ADD("uart2", I8251, 0)
+MACHINE_CONFIG_END
+
+/* ROM definition */
+
+ROM_START( mfabfz )
+	ROM_REGION( 0x8000, "roms", 0 )
+	ROM_SYSTEM_BIOS( 0, "v18t", "V1.8T" ) // 1986, works
+	ROMX_LOAD( "mfa_mat32k_vers.1.8-t_ic0.bin", 0x0000, 0x8000, CRC(6cba989e) SHA1(81611b6250a5319e5d28af5ce3a1e261af8315ae), ROM_BIOS(1) )
+	ROM_SYSTEM_BIOS( 1, "v18", "V1.8" ) // 1982, not working
+	ROMX_LOAD( "mfa_mat32k_vers.1.8-s_ic0.bin", 0x0000, 0x8000, CRC(021d7dff) SHA1(aa34b3a8bac52fc7746d35f5ffc6328734788cc2), ROM_BIOS(2) )
+ROM_END
+
+
+/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT     CLASS,        INIT   COMPANY                                FULLNAME                       FLAGS */
+COMP( 1979, mfabfz, 0,      0,       mfabfz,    mfabfz,   mfabfz_state,   0, "Berufsfoerdungszentrum Essen", "Mikrocomputer fuer Ausbildung", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW)

src/mame/mame.lst

@@ -20627,6 +20627,9 @@ wldarrow                        // (c) 1982 Meyco Games
 @source:meyc8088.cpp
 gldarrow                        // (c) 1984 Meyco Games
 
+@source:mfabfz.cpp
+mfabfz                          //
+
 @source:mgames.cpp
 mgames                          // (c) 1981 Merit
 

src/mame/mess.flt

@@ -359,6 +359,7 @@ mekd2.cpp
 mephisto.cpp
 mephisto_montec.cpp
 mes.cpp
+mfabfz.cpp
 mice.cpp
 micral.cpp
 micro20.cpp