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author Miodrag Milanovic <mmicko@gmail.com>2015-11-08 12:56:12 +0100
committer Miodrag Milanovic <mmicko@gmail.com>2015-11-08 12:56:12 +0100
commit7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch)
treef310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/mame/drivers/altair.cpp
parenta57b46ae933badd7441ce1644711dbb851e2b504 (diff)
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/mame/drivers/altair.cpp')
-rw-r--r--src/mame/drivers/altair.cpp132
1 files changed, 132 insertions, 0 deletions
diff --git a/src/mame/drivers/altair.cpp b/src/mame/drivers/altair.cpp
new file mode 100644
index 00000000000..e324a807478
--- /dev/null
+++ b/src/mame/drivers/altair.cpp
@@ -0,0 +1,132 @@
+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic, Robbbert
+/***************************************************************************
+
+ MITS Altair 8800b Turnkey
+
+ 04/12/2009 Initial driver by Miodrag Milanovic
+
+ Commands:
+ All commands must be in uppercase. Address and data is
+ specified in Octal format (not hex).
+
+ Press space to input your command line (not return).
+
+ D - Memory Dump
+ J - Jump to address
+ M - Modify memory
+
+****************************************************************************/
+
+#include "bus/rs232/rs232.h"
+#include "cpu/i8085/i8085.h"
+#include "machine/6850acia.h"
+#include "machine/clock.h"
+#include "imagedev/snapquik.h"
+
+
+class altair_state : public driver_device
+{
+public:
+ altair_state(const machine_config &mconfig, device_type type, const char *tag) :
+ driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_mc6850(*this, "mc6850"),
+ m_ram(*this, "ram")
+ {
+ }
+
+ DECLARE_QUICKLOAD_LOAD_MEMBER(altair);
+ DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
+
+protected:
+ virtual void machine_reset();
+
+private:
+ required_device<cpu_device> m_maincpu;
+ required_device<acia6850_device> m_mc6850;
+ required_shared_ptr<UINT8> m_ram;
+};
+
+
+
+static ADDRESS_MAP_START(altair_mem, AS_PROGRAM, 8, altair_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE( 0x0000, 0xfcff ) AM_RAM AM_SHARE("ram")
+ AM_RANGE( 0xfd00, 0xfdff ) AM_ROM
+ AM_RANGE( 0xff00, 0xffff ) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(altair_io, AS_IO, 8, altair_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ // TODO: Remove AM_MIRROR() and use SIO address S0-S7
+ AM_RANGE( 0x00, 0x00 ) AM_MIRROR(0x10) AM_DEVREADWRITE("mc6850", acia6850_device, status_r, control_w)
+ AM_RANGE( 0x01, 0x01 ) AM_MIRROR(0x10) AM_DEVREADWRITE("mc6850", acia6850_device, data_r, data_w)
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( altair )
+INPUT_PORTS_END
+
+
+QUICKLOAD_LOAD_MEMBER( altair_state,altair)
+{
+ int quick_length;
+ int read_;
+ quick_length = image.length();
+ if (quick_length >= 0xfd00)
+ return IMAGE_INIT_FAIL;
+ read_ = image.fread(m_ram, quick_length);
+ if (read_ != quick_length)
+ return IMAGE_INIT_FAIL;
+
+ return IMAGE_INIT_PASS;
+}
+
+WRITE_LINE_MEMBER(altair_state::write_acia_clock)
+{
+ m_mc6850->write_txc(state);
+ m_mc6850->write_rxc(state);
+}
+
+void altair_state::machine_reset()
+{
+ // Set startup addess done by turn-key
+ m_maincpu->set_state_int(I8085_PC, 0xFD00);
+}
+
+static MACHINE_CONFIG_START( altair, altair_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", I8080, XTAL_2MHz)
+ MCFG_CPU_PROGRAM_MAP(altair_mem)
+ MCFG_CPU_IO_MAP(altair_io)
+
+ /* video hardware */
+ MCFG_DEVICE_ADD("mc6850", ACIA6850, 0)
+ MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd))
+ MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
+
+ MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
+ MCFG_RS232_RXD_HANDLER(DEVWRITELINE("mc6850", acia6850_device, write_rxd))
+ MCFG_RS232_DCD_HANDLER(DEVWRITELINE("mc6850", acia6850_device, write_dcd))
+ MCFG_RS232_CTS_HANDLER(DEVWRITELINE("mc6850", acia6850_device, write_cts))
+
+ MCFG_DEVICE_ADD("acia_clock", CLOCK, 153600) // TODO: this is set using jumpers S3/S2/S1/S0
+ MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(altair_state, write_acia_clock))
+
+ /* quickload */
+ MCFG_QUICKLOAD_ADD("quickload", altair_state, altair, "bin", 0)
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( al8800bt )
+ ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_LOAD( "turnmon.bin", 0xfd00, 0x0100, CRC(5c629294) SHA1(125c76216954b681721fff84a3aca05094b21a28))
+ ROM_LOAD( "88dskrom.bin", 0xff00, 0x0100, CRC(7c5232f3) SHA1(24f940ad70ad2829e1bc800c6790b6e993e6ebf6))
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1975, al8800bt, 0, 0, altair, altair, driver_device, 0, "MITS", "Altair 8800bt", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW)