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author Miodrag Milanovic <mmicko@gmail.com>2012-08-21 10:41:19 +0000
committer Miodrag Milanovic <mmicko@gmail.com>2012-08-21 10:41:19 +0000
commit7285b359d259b2ae0fdf85096571c386ec8c991a (patch)
treea027aff57f1a255f9ec6cfd3b68cabe4b6683998 /src/mess/machine/dec_lk201.c
parent67c425e90757876a6716b7867df30c0149912e74 (diff)
Merge of MESS sources (no whatsnew)
Diffstat (limited to 'src/mess/machine/dec_lk201.c')
-rw-r--r--src/mess/machine/dec_lk201.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/src/mess/machine/dec_lk201.c b/src/mess/machine/dec_lk201.c
new file mode 100644
index 00000000000..df1428498c0
--- /dev/null
+++ b/src/mess/machine/dec_lk201.c
@@ -0,0 +1,264 @@
+/*
+ DEC LK-201 keyboard
+ Emulation by R. Belmont
+
+ This is currently the 6805 version; there's also an 8048 version.
+*/
+
+#include "emu.h"
+#include "dec_lk201.h"
+#include "cpu/m6805/m6805.h"
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define LK201_CPU_TAG "lk201"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type LK201 = &device_creator<lk201_device>;
+
+ROM_START( lk201 )
+ ROM_REGION(0x2000, LK201_CPU_TAG, 0)
+ ROM_LOAD( "23-00159-00.bin", 0x0000, 0x2000, CRC(be293c51) SHA1(a11ae004d2d6055d7279da3560c3e56610a19fdb) )
+ROM_END
+
+//-------------------------------------------------
+// ADDRESS_MAP
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( lk201_map, AS_PROGRAM, 8, lk201_device )
+ AM_RANGE(0x0000, 0x0002) AM_READWRITE(ports_r, ports_w)
+ AM_RANGE(0x0004, 0x0006) AM_READWRITE(ddr_r, ddr_w)
+ AM_RANGE(0x000a, 0x000c) AM_READWRITE(spi_r, spi_w)
+ AM_RANGE(0x000d, 0x0011) AM_READWRITE(sci_r, sci_w)
+ AM_RANGE(0x0050, 0x00ff) AM_RAM
+ AM_RANGE(0x0100, 0x1fff) AM_ROM AM_REGION(LK201_CPU_TAG, 0x100)
+ADDRESS_MAP_END
+
+//-------------------------------------------------
+// MACHINE_CONFIG
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( lk201 )
+ MCFG_CPU_ADD(LK201_CPU_TAG, M68HC05EG, 2000000) // actually 68HC05C4
+ MCFG_CPU_PROGRAM_MAP(lk201_map)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor lk201_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( lk201 );
+}
+
+const rom_entry *lk201_device::device_rom_region() const
+{
+ return ROM_NAME( lk201 );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// lk201_device - constructor
+//-------------------------------------------------
+
+lk201_device::lk201_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, LK201, "DEC LK201 keyboard", tag, owner, clock),
+ m_maincpu(*this, LK201_CPU_TAG)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void lk201_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void lk201_device::device_reset()
+{
+}
+
+void lk201_device::device_config_complete()
+{
+ m_shortname = "lk201";
+}
+
+READ8_MEMBER( lk201_device::ddr_r )
+{
+ return ddrs[offset];
+}
+
+WRITE8_MEMBER( lk201_device::ddr_w )
+{
+// printf("%02x to PORT %c DDR (PC=%x)\n", data, 'A' + offset, cpu_get_pc(m_maincpu));
+
+ send_port(space, offset, ports[offset] & data);
+
+ ddrs[offset] = data;
+}
+
+READ8_MEMBER( lk201_device::ports_r )
+{
+ UINT8 incoming = 0;
+
+ switch (offset)
+ {
+ case 0: // port A
+ break;
+
+ case 1: // port B
+ break;
+
+ case 2: // port C
+ break;
+ }
+
+ // apply data direction registers
+ incoming &= (ddrs[offset] ^ 0xff);
+ // add in ddr-masked version of port writes
+ incoming |= (ports[offset] & ddrs[offset]);
+
+// printf("PORT %c read = %02x (DDR = %02x latch = %02x) (PC=%x)\n", 'A' + offset, ports[offset], ddrs[offset], ports[offset], cpu_get_pc(m_maincpu));
+
+ return incoming;
+}
+
+WRITE8_MEMBER( lk201_device::ports_w )
+{
+ send_port(space, offset, data);
+
+ ports[offset] = data;
+}
+
+void lk201_device::send_port(address_space &space, UINT8 offset, UINT8 data)
+{
+// printf("PORT %c write %02x (DDR = %02x) (PC=%x)\n", 'A' + offset, data, ddrs[offset], cpu_get_pc(m_maincpu));
+
+ switch (offset)
+ {
+ case 0: // port A
+ break;
+
+ case 1: // port B
+ break;
+
+ case 2: // port C
+ break;
+ }
+}
+
+READ8_MEMBER( lk201_device::sci_r )
+{
+ UINT8 incoming = 0;
+
+ switch (offset)
+ {
+ case 0: // baud rate
+ break;
+
+ case 1: // control 1
+ break;
+
+ case 2: // control 2
+ break;
+
+ case 3: // status
+ incoming |= 0x40; // indicate transmit ready
+ break;
+
+ case 4: // data
+ break;
+ }
+
+// printf("SCI read @ %x = %02x (PC=%x)\n", offset, incoming, cpu_get_pc(m_maincpu));
+
+ return incoming;
+}
+
+WRITE8_MEMBER( lk201_device::sci_w )
+{
+ switch (offset)
+ {
+ case 0: // baud rate
+ break;
+
+ case 1: // control 1
+ break;
+
+ case 2: // control 2
+ break;
+
+ case 3: // status
+ break;
+
+ case 4: // data
+ break;
+ }
+
+// printf("SCI %02x to %x (PC=%x)\n", data, offset, cpu_get_pc(m_maincpu));
+}
+
+READ8_MEMBER( lk201_device::spi_r )
+{
+ UINT8 incoming = 0;
+
+ switch (offset)
+ {
+ case 0: // control
+ break;
+
+ case 1: // status
+ incoming |= 0x80;
+ break;
+
+ case 2: // data
+ break;
+ }
+
+// printf("SPI read @ %x = %02x (PC=%x)\n", offset, incoming, cpu_get_pc(m_maincpu));
+
+ return incoming;
+}
+
+WRITE8_MEMBER( lk201_device::spi_w )
+{
+ switch (offset)
+ {
+ case 0: // control
+ break;
+
+ case 1: // status
+ break;
+
+ case 2: // data
+ break;
+ }
+
+// printf("SPI %02x to %x (PC=%x)\n", data, offset, cpu_get_pc(m_maincpu));
+}
+
+/*
+
+SCI 01 to 4 (PC=24b) firmware ID
+SCI 00 to 4 (PC=cb2) hardware jumpers ID (port C & 0x30)
+SCI 00 to 4 (PC=cb2) self-test result OK
+SCI 00 to 4 (PC=cb2) keycode if there was a self-test error
+
+*/