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-rw-r--r--src/mame/machine/bk.cpp168
1 files changed, 168 insertions, 0 deletions
diff --git a/src/mame/machine/bk.cpp b/src/mame/machine/bk.cpp
new file mode 100644
index 00000000000..605b66dc74b
--- /dev/null
+++ b/src/mame/machine/bk.cpp
@@ -0,0 +1,168 @@
+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic
+/***************************************************************************
+
+ BK machine driver by Miodrag Milanovic
+
+ 10/03/2008 Preliminary driver.
+
+****************************************************************************/
+
+
+#include "emu.h"
+#include "imagedev/cassette.h"
+#include "machine/i8255.h"
+#include "includes/bk.h"
+
+
+TIMER_CALLBACK_MEMBER(bk_state::keyboard_callback)
+{
+ UINT8 code, i, j;
+ static const char *const keynames[] = {
+ "LINE1", "LINE2", "LINE3", "LINE4", "LINE5", "LINE6",
+ "LINE7", "LINE8", "LINE9", "LINE10", "LINE11"
+ };
+
+ for(i = 1; i < 12; i++)
+ {
+ code = ioport(keynames[i-1])->read();
+ if (code != 0)
+ {
+ for(j = 0; j < 8; j++)
+ {
+ if (code == (1 << j))
+ {
+ m_key_code = j + i*8;
+ break;
+ }
+ }
+ if ((ioport("LINE0")->read() & 4) == 4)
+ {
+ if (i==6 || i==7)
+ {
+ m_key_code -= 16;
+ }
+
+ }
+ if ((ioport("LINE0")->read() & 4) == 4)
+ {
+ if (i>=8 && i<=11)
+ {
+ m_key_code += 32;
+ }
+ }
+ m_key_pressed = 0x40;
+ if ((ioport("LINE0")->read() & 2) == 0)
+ {
+ m_key_irq_vector = 0x30;
+ }
+ else
+ {
+ m_key_irq_vector = 0xBC;
+ }
+ m_maincpu->set_input_line(0, ASSERT_LINE);
+ break;
+ }
+ }
+}
+
+
+void bk_state::machine_start()
+{
+ machine().scheduler().timer_pulse(attotime::from_hz(2400), timer_expired_delegate(FUNC(bk_state::keyboard_callback),this));
+}
+
+IRQ_CALLBACK_MEMBER(bk_state::bk0010_irq_callback)
+{
+ device.execute().set_input_line(0, CLEAR_LINE);
+ return m_key_irq_vector;
+}
+
+void bk_state::machine_reset()
+{
+ m_kbd_state = 0;
+ m_scrool = 01330;
+}
+
+READ16_MEMBER(bk_state::bk_key_state_r)
+{
+ return m_kbd_state;
+}
+READ16_MEMBER(bk_state::bk_key_code_r)
+{
+ m_kbd_state &= ~0x80; // mark reading done
+ m_key_pressed = 0;
+ return m_key_code;
+}
+READ16_MEMBER(bk_state::bk_vid_scrool_r)
+{
+ return m_scrool;
+}
+
+READ16_MEMBER(bk_state::bk_key_press_r)
+{
+ double level = m_cassette->input();
+ UINT16 cas;
+ if (level < 0)
+ {
+ cas = 0x00;
+ }
+ else
+ {
+ cas = 0x20;
+ }
+
+ return 0x8080 | m_key_pressed | cas;
+}
+
+WRITE16_MEMBER(bk_state::bk_key_state_w)
+{
+ m_kbd_state = (m_kbd_state & ~0x40) | (data & 0x40);
+}
+
+WRITE16_MEMBER(bk_state::bk_vid_scrool_w)
+{
+ m_scrool = data;
+}
+
+WRITE16_MEMBER(bk_state::bk_key_press_w)
+{
+}
+
+READ16_MEMBER(bk_state::bk_floppy_cmd_r)
+{
+ return 0;
+}
+
+WRITE16_MEMBER(bk_state::bk_floppy_cmd_w)
+{
+ if ((data & 1) == 1)
+ {
+ m_drive = 0;
+ }
+ if ((data & 2) == 2)
+ {
+ m_drive = 1;
+ }
+ if ((data & 4) == 4)
+ {
+ m_drive = 2;
+ }
+ if ((data & 8) == 8)
+ {
+ m_drive = 3;
+ }
+ if (data == 0)
+ {
+ m_drive = -1;
+ }
+}
+
+READ16_MEMBER(bk_state::bk_floppy_data_r)
+{
+ return 0;
+}
+
+WRITE16_MEMBER(bk_state::bk_floppy_data_w)
+{
+}