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Diffstat (limited to 'src/mess/drivers/ssem.c')
-rw-r--r--src/mess/drivers/ssem.c661
1 files changed, 661 insertions, 0 deletions
diff --git a/src/mess/drivers/ssem.c b/src/mess/drivers/ssem.c
new file mode 100644
index 00000000000..659e1d3fbee
--- /dev/null
+++ b/src/mess/drivers/ssem.c
@@ -0,0 +1,661 @@
+/*
+ Manchester Small-Scale Experimental Machine (SSEM)
+
+ Driver by MooglyGuy
+*/
+
+
+#include "emu.h"
+#include "cpu/ssem/ssem.h"
+#include "imagedev/cartslot.h"
+#include <stdarg.h>
+
+
+class ssem_state : public driver_device
+{
+public:
+ ssem_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag) ,
+ m_store(*this, "store"){ }
+
+ required_shared_ptr<UINT8> m_store;
+ UINT8 m_store_line;
+};
+
+
+
+/****************************************************\
+* General helper functions *
+\****************************************************/
+
+// The SSEM stores its data, visually, with the leftmost bit corresponding to the least significant bit.
+// The de facto snapshot format for other SSEM simulators stores the data physically in that format as well.
+// Therefore, in MESS, every 32-bit word has its bits reversed, too, and as a result the values must be
+// un-reversed before being used.
+INLINE UINT32 reverse(UINT32 v)
+{
+ // Taken from http://www-graphics.stanford.edu/~seander/bithacks.html#ReverseParallel
+ // swap odd and even bits
+ v = ((v >> 1) & 0x55555555) | ((v & 0x55555555) << 1);
+ // swap consecutive pairs
+ v = ((v >> 2) & 0x33333333) | ((v & 0x33333333) << 2);
+ // swap nibbles ...
+ v = ((v >> 4) & 0x0F0F0F0F) | ((v & 0x0F0F0F0F) << 4);
+ // swap bytes
+ v = ((v >> 8) & 0x00FF00FF) | ((v & 0x00FF00FF) << 8);
+ // swap 2-byte long pairs
+ v = ( v >> 16 ) | ( v << 16);
+
+ return v;
+}
+
+/****************************************************\
+* Address map *
+\****************************************************/
+
+static ADDRESS_MAP_START( ssem_map, AS_PROGRAM, 8, ssem_state )
+ AM_RANGE(0x00, 0x7f) AM_RAM AM_SHARE("store")// Primary store
+ADDRESS_MAP_END
+
+/****************************************************\
+* Input ports and front panel handling *
+\****************************************************/
+
+enum
+{
+ // Bit-edit buttons
+ PANEL_BIT0, PANEL_BIT1, PANEL_BIT2, PANEL_BIT3, PANEL_BIT4, PANEL_BIT5, PANEL_BIT6, PANEL_BIT7,
+ PANEL_BIT8, PANEL_BIT9, PANEL_BIT10, PANEL_BIT11, PANEL_BIT12, PANEL_BIT13, PANEL_BIT14, PANEL_BIT15,
+ PANEL_BIT16, PANEL_BIT17, PANEL_BIT18, PANEL_BIT19, PANEL_BIT20, PANEL_BIT21, PANEL_BIT22, PANEL_BIT23,
+ PANEL_BIT24, PANEL_BIT25, PANEL_BIT26, PANEL_BIT27, PANEL_BIT28, PANEL_BIT29, PANEL_BIT30, PANEL_BIT31,
+
+ // Page up, page down
+ PANEL_PGUP, PANEL_PGDN,
+
+ // Line up, line down
+ PANEL_LNUP, PANEL_LNDN,
+
+ // Halt
+ PANEL_HALT,
+};
+
+static INPUT_CHANGED( panel_check )
+{
+ ssem_state *state = field.machine().driver_data<ssem_state>();
+ UINT8 edit0_state = field.machine().root_device().ioport("EDIT0")->read();
+ UINT8 edit1_state = field.machine().root_device().ioport("EDIT1")->read();
+ UINT8 edit2_state = field.machine().root_device().ioport("EDIT2")->read();
+ UINT8 edit3_state = field.machine().root_device().ioport("EDIT3")->read();
+ UINT8 misc_state = field.machine().root_device().ioport("MISC")->read();
+ device_t *ssem_cpu = field.machine().device("maincpu");
+
+ switch( (int)(FPTR)param )
+ {
+ case PANEL_BIT0:
+ if(edit0_state & 0x01) state->m_store[(state->m_store_line << 2) | 0] ^= 0x80;
+ break;
+ case PANEL_BIT1:
+ if(edit0_state & 0x02) state->m_store[(state->m_store_line << 2) | 0] ^= 0x40;
+ break;
+ case PANEL_BIT2:
+ if(edit0_state & 0x04) state->m_store[(state->m_store_line << 2) | 0] ^= 0x20;
+ break;
+ case PANEL_BIT3:
+ if(edit0_state & 0x08) state->m_store[(state->m_store_line << 2) | 0] ^= 0x10;
+ break;
+ case PANEL_BIT4:
+ if(edit0_state & 0x10) state->m_store[(state->m_store_line << 2) | 0] ^= 0x08;
+ break;
+ case PANEL_BIT5:
+ if(edit0_state & 0x20) state->m_store[(state->m_store_line << 2) | 0] ^= 0x04;
+ break;
+ case PANEL_BIT6:
+ if(edit0_state & 0x40) state->m_store[(state->m_store_line << 2) | 0] ^= 0x02;
+ break;
+ case PANEL_BIT7:
+ if(edit0_state & 0x80) state->m_store[(state->m_store_line << 2) | 0] ^= 0x01;
+ break;
+ case PANEL_BIT8:
+ if(edit1_state & 0x01) state->m_store[(state->m_store_line << 2) | 1] ^= 0x80;
+ break;
+ case PANEL_BIT9:
+ if(edit1_state & 0x02) state->m_store[(state->m_store_line << 2) | 1] ^= 0x40;
+ break;
+ case PANEL_BIT10:
+ if(edit1_state & 0x04) state->m_store[(state->m_store_line << 2) | 1] ^= 0x20;
+ break;
+ case PANEL_BIT11:
+ if(edit1_state & 0x08) state->m_store[(state->m_store_line << 2) | 1] ^= 0x10;
+ break;
+ case PANEL_BIT12:
+ if(edit1_state & 0x10) state->m_store[(state->m_store_line << 2) | 1] ^= 0x08;
+ break;
+ case PANEL_BIT13:
+ if(edit1_state & 0x20) state->m_store[(state->m_store_line << 2) | 1] ^= 0x04;
+ break;
+ case PANEL_BIT14:
+ if(edit1_state & 0x40) state->m_store[(state->m_store_line << 2) | 1] ^= 0x02;
+ break;
+ case PANEL_BIT15:
+ if(edit1_state & 0x80) state->m_store[(state->m_store_line << 2) | 1] ^= 0x01;
+ break;
+ case PANEL_BIT16:
+ if(edit2_state & 0x01) state->m_store[(state->m_store_line << 2) | 2] ^= 0x80;
+ break;
+ case PANEL_BIT17:
+ if(edit2_state & 0x02) state->m_store[(state->m_store_line << 2) | 2] ^= 0x40;
+ break;
+ case PANEL_BIT18:
+ if(edit2_state & 0x04) state->m_store[(state->m_store_line << 2) | 2] ^= 0x20;
+ break;
+ case PANEL_BIT19:
+ if(edit2_state & 0x08) state->m_store[(state->m_store_line << 2) | 2] ^= 0x10;
+ break;
+ case PANEL_BIT20:
+ if(edit2_state & 0x10) state->m_store[(state->m_store_line << 2) | 2] ^= 0x08;
+ break;
+ case PANEL_BIT21:
+ if(edit2_state & 0x20) state->m_store[(state->m_store_line << 2) | 2] ^= 0x04;
+ break;
+ case PANEL_BIT22:
+ if(edit2_state & 0x40) state->m_store[(state->m_store_line << 2) | 2] ^= 0x02;
+ break;
+ case PANEL_BIT23:
+ if(edit2_state & 0x80) state->m_store[(state->m_store_line << 2) | 2] ^= 0x01;
+ break;
+ case PANEL_BIT24:
+ if(edit3_state & 0x01) state->m_store[(state->m_store_line << 2) | 3] ^= 0x80;
+ break;
+ case PANEL_BIT25:
+ if(edit3_state & 0x02) state->m_store[(state->m_store_line << 2) | 3] ^= 0x40;
+ break;
+ case PANEL_BIT26:
+ if(edit3_state & 0x04) state->m_store[(state->m_store_line << 2) | 3] ^= 0x20;
+ break;
+ case PANEL_BIT27:
+ if(edit3_state & 0x08) state->m_store[(state->m_store_line << 2) | 3] ^= 0x10;
+ break;
+ case PANEL_BIT28:
+ if(edit3_state & 0x10) state->m_store[(state->m_store_line << 2) | 3] ^= 0x08;
+ break;
+ case PANEL_BIT29:
+ if(edit3_state & 0x20) state->m_store[(state->m_store_line << 2) | 3] ^= 0x04;
+ break;
+ case PANEL_BIT30:
+ if(edit3_state & 0x40) state->m_store[(state->m_store_line << 2) | 3] ^= 0x02;
+ break;
+ case PANEL_BIT31:
+ if(edit3_state & 0x80) state->m_store[(state->m_store_line << 2) | 3] ^= 0x01;
+ break;
+ case PANEL_LNUP:
+ if(misc_state & 0x01)
+ {
+ state->m_store_line--;
+ }
+ break;
+ case PANEL_LNDN:
+ if(misc_state & 0x02)
+ {
+ state->m_store_line++;
+ }
+ break;
+ case PANEL_HALT:
+ if(misc_state & 0x04)
+ {
+ cpu_set_reg(ssem_cpu, SSEM_HALT, 1 - cpu_get_reg(ssem_cpu, SSEM_HALT));
+ }
+ break;
+ }
+}
+
+static INPUT_PORTS_START( ssem )
+ PORT_START("EDIT0")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 0") PORT_CODE(KEYCODE_1) PORT_CHANGED(panel_check, (void*)PANEL_BIT0)
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 1") PORT_CODE(KEYCODE_2) PORT_CHANGED(panel_check, (void*)PANEL_BIT1)
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 2") PORT_CODE(KEYCODE_3) PORT_CHANGED(panel_check, (void*)PANEL_BIT2)
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 3") PORT_CODE(KEYCODE_4) PORT_CHANGED(panel_check, (void*)PANEL_BIT3)
+ PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 4") PORT_CODE(KEYCODE_5) PORT_CHANGED(panel_check, (void*)PANEL_BIT4)
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 5") PORT_CODE(KEYCODE_6) PORT_CHANGED(panel_check, (void*)PANEL_BIT5)
+ PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 6") PORT_CODE(KEYCODE_7) PORT_CHANGED(panel_check, (void*)PANEL_BIT6)
+ PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 7") PORT_CODE(KEYCODE_8) PORT_CHANGED(panel_check, (void*)PANEL_BIT7)
+
+ PORT_START("EDIT1")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 8") PORT_CODE(KEYCODE_Q) PORT_CHANGED(panel_check, (void*)PANEL_BIT8)
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 9") PORT_CODE(KEYCODE_W) PORT_CHANGED(panel_check, (void*)PANEL_BIT9)
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 10") PORT_CODE(KEYCODE_E) PORT_CHANGED(panel_check, (void*)PANEL_BIT10)
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 11") PORT_CODE(KEYCODE_R) PORT_CHANGED(panel_check, (void*)PANEL_BIT11)
+ PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 12") PORT_CODE(KEYCODE_T) PORT_CHANGED(panel_check, (void*)PANEL_BIT12)
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 13") PORT_CODE(KEYCODE_Y) PORT_CHANGED(panel_check, (void*)PANEL_BIT13)
+ PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 14") PORT_CODE(KEYCODE_U) PORT_CHANGED(panel_check, (void*)PANEL_BIT14)
+ PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 15") PORT_CODE(KEYCODE_I) PORT_CHANGED(panel_check, (void*)PANEL_BIT15)
+
+ PORT_START("EDIT2")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 16") PORT_CODE(KEYCODE_A) PORT_CHANGED(panel_check, (void*)PANEL_BIT16)
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 17") PORT_CODE(KEYCODE_S) PORT_CHANGED(panel_check, (void*)PANEL_BIT17)
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 18") PORT_CODE(KEYCODE_D) PORT_CHANGED(panel_check, (void*)PANEL_BIT18)
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 19") PORT_CODE(KEYCODE_F) PORT_CHANGED(panel_check, (void*)PANEL_BIT19)
+ PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 20") PORT_CODE(KEYCODE_G) PORT_CHANGED(panel_check, (void*)PANEL_BIT20)
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 21") PORT_CODE(KEYCODE_H) PORT_CHANGED(panel_check, (void*)PANEL_BIT21)
+ PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 22") PORT_CODE(KEYCODE_J) PORT_CHANGED(panel_check, (void*)PANEL_BIT22)
+ PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 23") PORT_CODE(KEYCODE_K) PORT_CHANGED(panel_check, (void*)PANEL_BIT23)
+
+ PORT_START("EDIT3")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 24") PORT_CODE(KEYCODE_Z) PORT_CHANGED(panel_check, (void*)PANEL_BIT24)
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 25") PORT_CODE(KEYCODE_X) PORT_CHANGED(panel_check, (void*)PANEL_BIT25)
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 26") PORT_CODE(KEYCODE_C) PORT_CHANGED(panel_check, (void*)PANEL_BIT26)
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 27") PORT_CODE(KEYCODE_V) PORT_CHANGED(panel_check, (void*)PANEL_BIT27)
+ PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 28") PORT_CODE(KEYCODE_B) PORT_CHANGED(panel_check, (void*)PANEL_BIT28)
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 29") PORT_CODE(KEYCODE_N) PORT_CHANGED(panel_check, (void*)PANEL_BIT29)
+ PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 30") PORT_CODE(KEYCODE_M) PORT_CHANGED(panel_check, (void*)PANEL_BIT30)
+ PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Bit 31") PORT_CODE(KEYCODE_COMMA) PORT_CHANGED(panel_check, (void*)PANEL_BIT31)
+
+ PORT_START("MISC")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Line Up") PORT_CODE(KEYCODE_UP) PORT_CHANGED(panel_check, (void*)PANEL_LNUP)
+ PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Line Down") PORT_CODE(KEYCODE_DOWN) PORT_CHANGED(panel_check, (void*)PANEL_LNDN)
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Halt") PORT_CHANGED(panel_check, (void*)PANEL_HALT)
+ PORT_BIT(0xf8, IP_ACTIVE_HIGH, IPT_UNUSED)
+INPUT_PORTS_END
+
+/****************************************************\
+* Video hardware *
+\****************************************************/
+
+static const UINT8 char_glyphs[0x80][8] =
+{
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x10, 0x38, 0x10, 0x00, 0x00, 0x00 },
+ { 0x38, 0x7c, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x00 },
+ { 0xff, 0xff, 0xef, 0xc7, 0xef, 0xff, 0xff, 0xff },
+ { 0xc7, 0x83, 0x01, 0x01, 0x01, 0x83, 0xc7, 0xff },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, 0x18, 0x00 },
+ { 0x66, 0x66, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x6c, 0x6c, 0xfe, 0x6c, 0xfe, 0x6c, 0x6c, 0x00 },
+ { 0x18, 0x3e, 0x60, 0x3c, 0x06, 0x7c, 0x18, 0x00 },
+ { 0xc6, 0xcc, 0x18, 0x30, 0x60, 0xc6, 0x86, 0x00 },
+ { 0x78, 0xcc, 0x78, 0x70, 0xce, 0xcc, 0x7e, 0x00 },
+ { 0x18, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x0c, 0x18, 0x30, 0x30, 0x30, 0x18, 0x0c, 0x00 },
+ { 0x30, 0x18, 0x0c, 0x0c, 0x0c, 0x18, 0x30, 0x00 },
+ { 0x00, 0x66, 0x3c, 0xff, 0x3c, 0x66, 0x00, 0x00 },
+ { 0x00, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x30 },
+ { 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00 },
+ { 0x02, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x00 },
+ { 0x3c, 0x66, 0x76, 0x7e, 0x6e, 0x66, 0x3c, 0x00 },
+ { 0x18, 0x38, 0x18, 0x18, 0x18, 0x18, 0x3c, 0x00 },
+ { 0x3c, 0x66, 0x06, 0x0c, 0x30, 0x60, 0x7e, 0x00 },
+ { 0x3c, 0x66, 0x06, 0x0c, 0x06, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x66, 0x66, 0x7e, 0x06, 0x06, 0x06, 0x00 },
+ { 0x7e, 0x60, 0x7c, 0x06, 0x06, 0x66, 0x3c, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x7c, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x7e, 0x66, 0x06, 0x0c, 0x18, 0x18, 0x18, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x3c, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x3e, 0x06, 0x66, 0x3c, 0x00 },
+ { 0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x00 },
+ { 0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x30 },
+ { 0x0c, 0x18, 0x30, 0x60, 0x30, 0x18, 0x0c, 0x00 },
+ { 0x00, 0x00, 0x7e, 0x00, 0x7e, 0x00, 0x00, 0x00 },
+ { 0x30, 0x18, 0x0c, 0x06, 0x0c, 0x18, 0x30, 0x00 },
+ { 0x3c, 0x66, 0x06, 0x0c, 0x18, 0x00, 0x18, 0x00 },
+ { 0x3c, 0x66, 0x6e, 0x6e, 0x60, 0x66, 0x3c, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x7e, 0x66, 0x66, 0x66, 0x00 },
+ { 0x7c, 0x66, 0x66, 0x7c, 0x66, 0x66, 0x7c, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x60, 0x60, 0x66, 0x3c, 0x00 },
+ { 0x7c, 0x66, 0x66, 0x66, 0x66, 0x66, 0x7c, 0x00 },
+ { 0x7e, 0x60, 0x60, 0x78, 0x60, 0x60, 0x7e, 0x00 },
+ { 0x7e, 0x60, 0x60, 0x78, 0x60, 0x60, 0x60, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x6e, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x66, 0x66, 0x7e, 0x66, 0x66, 0x66, 0x00 },
+ { 0x3c, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3c, 0x00 },
+ { 0x06, 0x06, 0x06, 0x06, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x6c, 0x78, 0x70, 0x78, 0x6c, 0x66, 0x00 },
+ { 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x7e, 0x00 },
+ { 0xc6, 0xee, 0xfe, 0xfe, 0xd6, 0xc6, 0xc6, 0x00 },
+ { 0x66, 0x76, 0x7e, 0x7e, 0x6e, 0x66, 0x66, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x7c, 0x66, 0x66, 0x7c, 0x60, 0x60, 0x60, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x06 },
+ { 0x7c, 0x66, 0x66, 0x7c, 0x66, 0x66, 0x66, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x3c, 0x06, 0x66, 0x3c, 0x00 },
+ { 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00 },
+ { 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x00 },
+ { 0xc6, 0xc6, 0xd6, 0xfe, 0xfe, 0xee, 0xc6, 0x00 },
+ { 0x66, 0x66, 0x3c, 0x18, 0x3c, 0x66, 0x66, 0x00 },
+ { 0x66, 0x66, 0x66, 0x3c, 0x18, 0x18, 0x18, 0x00 },
+ { 0x7e, 0x06, 0x0c, 0x18, 0x30, 0x60, 0x7e, 0x00 },
+ { 0x3c, 0x30, 0x30, 0x30, 0x30, 0x30, 0x3c, 0x00 },
+ { 0x80, 0xc0, 0x60, 0x30, 0x18, 0x0c, 0x06, 0x00 },
+ { 0x3c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x3c, 0x00 },
+ { 0x10, 0x38, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f },
+ { 0x30, 0x18, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x7e, 0x66, 0x66, 0x66, 0x00 },
+ { 0x7c, 0x66, 0x66, 0x7c, 0x66, 0x66, 0x7c, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x60, 0x60, 0x66, 0x3c, 0x00 },
+ { 0x7c, 0x66, 0x66, 0x66, 0x66, 0x66, 0x7c, 0x00 },
+ { 0x7e, 0x60, 0x60, 0x78, 0x60, 0x60, 0x7e, 0x00 },
+ { 0x7e, 0x60, 0x60, 0x78, 0x60, 0x60, 0x60, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x6e, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x66, 0x66, 0x7e, 0x66, 0x66, 0x66, 0x00 },
+ { 0x3c, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3c, 0x00 },
+ { 0x06, 0x06, 0x06, 0x06, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x6c, 0x78, 0x70, 0x78, 0x6c, 0x66, 0x00 },
+ { 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x7e, 0x00 },
+ { 0xc6, 0xee, 0xfe, 0xfe, 0xd6, 0xc6, 0xc6, 0x00 },
+ { 0x66, 0x76, 0x7e, 0x7e, 0x6e, 0x66, 0x66, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x7c, 0x66, 0x66, 0x7c, 0x60, 0x60, 0x60, 0x00 },
+ { 0x3c, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x06 },
+ { 0x7c, 0x66, 0x66, 0x7c, 0x66, 0x66, 0x66, 0x00 },
+ { 0x3c, 0x66, 0x60, 0x3c, 0x06, 0x66, 0x3c, 0x00 },
+ { 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00 },
+ { 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x00 },
+ { 0x66, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x00 },
+ { 0xc6, 0xc6, 0xd6, 0xfe, 0xfe, 0xee, 0xc6, 0x00 },
+ { 0x66, 0x66, 0x3c, 0x18, 0x3c, 0x66, 0x66, 0x00 },
+ { 0x66, 0x66, 0x66, 0x3c, 0x18, 0x18, 0x18, 0x00 },
+ { 0x7e, 0x06, 0x0c, 0x18, 0x30, 0x60, 0x7e, 0x00 },
+ { 0x0c, 0x18, 0x18, 0x30, 0x18, 0x18, 0x0c, 0x00 },
+ { 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00 },
+ { 0x30, 0x18, 0x18, 0x0c, 0x18, 0x18, 0x30, 0x00 },
+ { 0x00, 0x00, 0x76, 0xdc, 0x00, 0x00, 0x00, 0x00 },
+ { 0xff, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0xff },
+};
+
+static void glyph_print(running_machine &machine, bitmap_rgb32 &bitmap, INT32 x, INT32 y, const char *msg, ...)
+{
+ va_list arg_list;
+ char buf[32768];
+ INT32 index = 0;
+ screen_device *screen = machine.first_screen();
+ const rectangle &visarea = screen->visible_area();
+
+ va_start( arg_list, msg );
+ vsprintf( buf, msg, arg_list );
+ va_end( arg_list );
+
+ for(index = 0; index < strlen(buf) && index < 32768; index++)
+ {
+ UINT8 cur = (UINT8)buf[index];
+ if(cur < 0x80)
+ {
+ INT32 line = 0;
+ for(line = 0; line < 8; line++)
+ {
+ UINT32 *d = &bitmap.pix32(y + line);
+ INT32 bit = 0;
+ for(bit = 0; bit < 8; bit++)
+ {
+ if(char_glyphs[cur][line] & (1 << (7 - bit)))
+ {
+ d[x+bit] = 0xffffffff;
+ }
+ else
+ {
+ d[x+bit] = 0;
+ }
+ }
+ }
+ }
+
+ x += 8;
+ if(x >= visarea.max_x)
+ {
+ x = 0;
+ y += 8;
+ if(y >= visarea.max_y)
+ {
+ y = 0;
+ }
+ }
+ }
+}
+
+static SCREEN_UPDATE_RGB32( ssem )
+{
+ ssem_state *state = screen.machine().driver_data<ssem_state>();
+ UINT32 line = 0;
+ device_t *ssem_cpu = screen.machine().device("maincpu");
+ UINT32 accum = cpu_get_reg(ssem_cpu, SSEM_A);
+ UINT32 bit = 0;
+ UINT32 word = 0;
+
+ for(line = 0; line < 32; line++)
+ {
+ word = (state->m_store[(line << 2) | 0] << 24) |
+ (state->m_store[(line << 2) | 1] << 16) |
+ (state->m_store[(line << 2) | 2] << 8) |
+ (state->m_store[(line << 2) | 3] << 0);
+ for(bit = 0; bit < 32; bit++)
+ {
+ if(word & (1 << (31 - bit)))
+ {
+ glyph_print(screen.machine(), bitmap, bit << 3, line << 3, "%c", line == state->m_store_line ? 4 : 2);
+ }
+ else
+ {
+ glyph_print(screen.machine(), bitmap, bit << 3, line << 3, "%c", line == state->m_store_line ? 3 : 1);
+ }
+ }
+ }
+
+ for(bit = 0; bit < 32; bit++)
+ {
+ if(accum & (1 << bit))
+ {
+ glyph_print(screen.machine(), bitmap, bit << 3, 264, "%c", 2);
+ }
+ else
+ {
+ glyph_print(screen.machine(), bitmap, bit << 3, 264, "%c", 1);
+ }
+ }
+
+ word = reverse((state->m_store[(state->m_store_line << 2) | 0] << 24) |
+ (state->m_store[(state->m_store_line << 2) | 1] << 16) |
+ (state->m_store[(state->m_store_line << 2) | 2] << 8) |
+ (state->m_store[(state->m_store_line << 2) | 3] << 0));
+ glyph_print(screen.machine(), bitmap, 0, 272, "LINE:%02d VALUE:%08x HALT:%d", state->m_store_line, word, cpu_get_reg(ssem_cpu, SSEM_HALT));
+ return 0;
+}
+
+/****************************************************\
+* Image helper functions *
+\****************************************************/
+
+static void strlower(char *buf)
+{
+ if(buf)
+ {
+ int i = 0;
+ for(i = 0; i < strlen(buf); i++)
+ {
+ if(buf[i] >= 'A' && buf[i] <= 'Z')
+ {
+ buf[i] |= 0x20;
+ }
+ }
+ }
+}
+
+/****************************************************\
+* Image loading *
+\****************************************************/
+
+static DEVICE_IMAGE_LOAD(ssem_store)
+{
+ ssem_state *state = image.device().machine().driver_data<ssem_state>();
+ const char* image_name = image.filename();
+ char image_ext[5] = { 0 };
+ char image_line[100] = { 0 };
+ char token_buf[100] = { 0 };
+ int num_lines = 0;
+ int i = 0;
+
+ // Isolate file extension and convert to lower-case
+ memcpy(image_ext, image_name + (strlen(image_name) - 4), 5);
+ strlower(image_ext);
+
+ image.fgets(image_line, 99);
+ sscanf(image_line, "%d", &num_lines);
+
+ if(num_lines)
+ {
+ for(i = 0; i < num_lines; i++)
+ {
+ UINT32 line = 0;
+ image.fgets(image_line, 99);
+
+ // Isolate and convert 4-digit decimal address
+ memcpy(token_buf, image_line, 4);
+ token_buf[4] = '\0';
+ sscanf(token_buf, "%04d", &line);
+
+ if(strcmp(image_ext, ".snp") == 0)
+ {
+ UINT32 word = 0;
+ int b = 0;
+
+ // Parse a line such as: 0000:00000110101001000100000100000100
+ for(b = 0; b < 32; b++)
+ {
+ if(image_line[5 + b] == '1')
+ {
+ word |= 1 << (31 - b);
+ }
+ }
+
+ state->m_store[(line << 2) + 0] = (word >> 24) & 0x000000ff;
+ state->m_store[(line << 2) + 1] = (word >> 16) & 0x000000ff;
+ state->m_store[(line << 2) + 2] = (word >> 8) & 0x000000ff;
+ state->m_store[(line << 2) + 3] = (word >> 0) & 0x000000ff;
+ }
+ else if(strcmp(image_ext, ".asm") == 0)
+ {
+ char op_buf[4] = { 0 };
+ INT32 value = 0;
+ UINT32 unsigned_value = 0;
+ UINT32 word = 0;
+
+ // Isolate the opcode and convert to lower-case
+ memcpy(op_buf, image_line + 5, 3);
+ op_buf[3] = '\0';
+ strlower(op_buf);
+
+ // Isolate the value
+ sscanf(image_line + 9, "%d", &value);
+ unsigned_value = reverse((UINT32)value);
+
+ if(strcmp(op_buf, "num") == 0)
+ {
+ word = unsigned_value;
+ }
+ else if(strcmp(op_buf, "jmp") == 0)
+ {
+ word = 0x00000000 | unsigned_value ;
+ }
+ else if(strcmp(op_buf, "jrp") == 0)
+ {
+ word = 0x00040000 | unsigned_value;
+ }
+ else if(strcmp(op_buf, "ldn") == 0)
+ {
+ word = 0x00020000 | unsigned_value;
+ }
+ else if(strcmp(op_buf, "sto") == 0)
+ {
+ word = 0x00060000 | unsigned_value;
+ }
+ else if(strcmp(op_buf, "sub") == 0)
+ {
+ word = 0x00010000 | unsigned_value;
+ }
+ else if(strcmp(op_buf, "cmp") == 0)
+ {
+ word = 0x00030000 | unsigned_value;
+ }
+ else if(strcmp(op_buf, "stp") == 0)
+ {
+ word = 0x00070000 | unsigned_value;
+ }
+
+ state->m_store[(line << 2) + 0] = (word >> 24) & 0x000000ff;
+ state->m_store[(line << 2) + 1] = (word >> 16) & 0x000000ff;
+ state->m_store[(line << 2) + 2] = (word >> 8) & 0x000000ff;
+ state->m_store[(line << 2) + 3] = (word >> 0) & 0x000000ff;
+ }
+ }
+ }
+
+ return IMAGE_INIT_PASS;
+}
+
+/****************************************************\
+* Machine definition *
+\****************************************************/
+
+static MACHINE_RESET( ssem )
+{
+ ssem_state *state = machine.driver_data<ssem_state>();
+ state->m_store_line = 0;
+}
+
+static MACHINE_CONFIG_START( ssem, ssem_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", SSEM, 700)
+ MCFG_CPU_PROGRAM_MAP(ssem_map)
+
+ MCFG_MACHINE_RESET(ssem)
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
+ MCFG_SCREEN_SIZE(256, 280)
+ MCFG_SCREEN_VISIBLE_AREA(0, 255, 0, 279)
+ MCFG_SCREEN_UPDATE_STATIC(ssem)
+ MCFG_PALETTE_LENGTH(2)
+ MCFG_PALETTE_INIT(black_and_white)
+
+ /* cartridge */
+ MCFG_CARTSLOT_ADD("cart")
+ MCFG_CARTSLOT_EXTENSION_LIST("snp,asm")
+ MCFG_CARTSLOT_LOAD(ssem_store)
+MACHINE_CONFIG_END
+
+ROM_START( ssem )
+ ROM_REGION( 0x80, "maincpu", ROMREGION_ERASE00 ) /* Main Store */
+ROM_END
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
+COMP(1948, ssem, 0, 0, ssem, ssem, driver_device, 0, "Manchester University", "Small-Scale Experimental Machine (SSEM), 'Baby'", GAME_NO_SOUND_HW )