summaryrefslogtreecommitdiffstatshomepage
path: root/src
diff options
context:
space:
mode:
author Robbbert <robbbert@users.noreply.github.com>2013-09-11 11:56:49 +0000
committer Robbbert <robbbert@users.noreply.github.com>2013-09-11 11:56:49 +0000
commit8a48b5878be1a7d4b04e603ab2ffda70f8480670 (patch)
treef8dfd3c9e273d6a2f23c6fc83472a88fd6f276f2 /src
parentd7aa801017d0502c0319d5cd2d3fcfcbd6e9382a (diff)
(MESS) New skeleton [Robbbert]
------------------------------------------------- Imsai MPU-B
Diffstat (limited to 'src')
-rw-r--r--src/mess/drivers/imsai.c106
-rw-r--r--src/mess/mess.lst2
-rw-r--r--src/mess/mess.mak1
3 files changed, 109 insertions, 0 deletions
diff --git a/src/mess/drivers/imsai.c b/src/mess/drivers/imsai.c
new file mode 100644
index 00000000000..541b631c1e2
--- /dev/null
+++ b/src/mess/drivers/imsai.c
@@ -0,0 +1,106 @@
+/***************************************************************************
+
+ Imsai MPU-B. One of the earliest single-board computers on a S100 card.
+
+ 2013-09-11 Skeleton driver.
+
+ Chips used: i8085, i8251, i8253, 3622 fusable prom. XTAL 6MHz
+
+ Press any key to start the monitor program.
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/i8085/i8085.h"
+#include "machine/terminal.h"
+
+
+class imsai_state : public driver_device
+{
+public:
+ imsai_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag)
+ , m_maincpu(*this, "maincpu")
+ , m_terminal(*this, TERMINAL_TAG)
+ { }
+
+ DECLARE_WRITE8_MEMBER(kbd_put);
+ DECLARE_READ8_MEMBER(keyin_r);
+ DECLARE_READ8_MEMBER(status_r);
+private:
+ UINT8 m_term_data;
+ virtual void machine_reset();
+ required_device<cpu_device> m_maincpu;
+ required_device<generic_terminal_device> m_terminal;
+};
+
+
+static ADDRESS_MAP_START(imsai_mem, AS_PROGRAM, 8, imsai_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x0000, 0x07ff) AM_ROM AM_REGION("roms", 0)
+ AM_RANGE(0xd000, 0xd7ff) AM_RAM
+ AM_RANGE(0xd800, 0xdfff) AM_ROM AM_REGION("roms", 0)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(imsai_io, AS_IO, 8, imsai_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x02, 0x02) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
+ AM_RANGE(0x03, 0x03) AM_READ(status_r)
+ AM_RANGE(0x12, 0x12) AM_READ(keyin_r)
+ AM_RANGE(0x13, 0x13) AM_READ(status_r)
+ AM_RANGE(0x14, 0x14) AM_READ(keyin_r)
+ AM_RANGE(0x15, 0x15) AM_READ(status_r)
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( imsai )
+INPUT_PORTS_END
+
+READ8_MEMBER( imsai_state::keyin_r )
+{
+ UINT8 ret = m_term_data;
+ m_term_data = 0;
+ return ret;
+}
+
+READ8_MEMBER( imsai_state::status_r )
+{
+ return (m_term_data) ? 3 : 1;
+}
+
+WRITE8_MEMBER( imsai_state::kbd_put )
+{
+ m_term_data = data;
+}
+
+static GENERIC_TERMINAL_INTERFACE( terminal_intf )
+{
+ DEVCB_DRIVER_MEMBER(imsai_state, kbd_put)
+};
+
+void imsai_state::machine_reset()
+{
+ m_term_data = 0;
+}
+
+static MACHINE_CONFIG_START( imsai, imsai_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu",I8085A, XTAL_6MHz)
+ MCFG_CPU_PROGRAM_MAP(imsai_mem)
+ MCFG_CPU_IO_MAP(imsai_io)
+
+ /* video hardware */
+ MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( imsai )
+ ROM_REGION( 0x800, "roms", 0 )
+ ROM_LOAD( "vdb-80.rom", 0x0000, 0x0800, CRC(0afc4683) SHA1(a5419aaee00badf339d7c627f50ef8b2538e42e2) )
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
+COMP( 1978, imsai, 0, 0, imsai, imsai, driver_device, 0, "Imsai", "MPU-B", GAME_NOT_WORKING | GAME_NO_SOUND_HW )
diff --git a/src/mess/mess.lst b/src/mess/mess.lst
index e4b1f78c198..2ff03311635 100644
--- a/src/mess/mess.lst
+++ b/src/mess/mess.lst
@@ -2265,3 +2265,5 @@ ampro
pm68k
lft1230
lft1510
+imsai
+
diff --git a/src/mess/mess.mak b/src/mess/mess.mak
index f50083aabab..c2e0b62b2ae 100644
--- a/src/mess/mess.mak
+++ b/src/mess/mess.mak
@@ -2400,6 +2400,7 @@ $(MESSOBJ)/skeleton.a: \
$(MESS_DRIVERS)/ibm6580.o \
$(MESS_DRIVERS)/ie15.o \
$(MESS_DRIVERS)/if800.o \
+ $(MESS_DRIVERS)/imsai.o \
$(MESS_DRIVERS)/indiana.o \
$(MESS_DRIVERS)/itt3030.o \
$(MESS_DRIVERS)/konin.o \