summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/machine/z80pio.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/emu/machine/z80pio.h')
-rw-r--r--src/emu/machine/z80pio.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/src/emu/machine/z80pio.h b/src/emu/machine/z80pio.h
new file mode 100644
index 00000000000..e699ce0de03
--- /dev/null
+++ b/src/emu/machine/z80pio.h
@@ -0,0 +1,92 @@
+/***************************************************************************
+
+ Z80 PIO implementation
+
+ Copyright (c) 1996-2007, Nicola Salmoria and the MAME Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+***************************************************************************/
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+#define MAX_PIO 2
+
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+struct _z80pio_interface
+{
+ void (*intr)(int which); /* callback when change interrupt status */
+ void (*rdyA)(int data); /* portA ready active callback (do not support yet)*/
+ void (*rdyB)(int data); /* portB ready active callback (do not support yet)*/
+};
+typedef struct _z80pio_interface z80pio_interface;
+
+
+
+/***************************************************************************
+ INITIALIZATION/CONFIGURATION
+***************************************************************************/
+
+void z80pio_init(int which, z80pio_interface *intf);
+void z80pio_reset(int which);
+
+
+
+/***************************************************************************
+ CONTROL REGISTER READ/WRITE
+***************************************************************************/
+
+void z80pio_c_w(int which, int ch, UINT8 data);
+UINT8 z80pio_c_r(int which, int ch);
+
+
+
+/***************************************************************************
+ DATA REGISTER READ/WRITE
+***************************************************************************/
+
+void z80pio_d_w(int which, int ch, UINT8 data);
+UINT8 z80pio_d_r(int which, int ch);
+
+
+
+/***************************************************************************
+ PORT I/O
+***************************************************************************/
+
+void z80pio_p_w(int which, UINT8 ch, UINT8 data);
+int z80pio_p_r(int which, UINT8 ch);
+
+WRITE8_HANDLER( z80pioA_0_p_w );
+WRITE8_HANDLER( z80pioB_0_p_w );
+READ8_HANDLER( z80pioA_0_p_r );
+READ8_HANDLER( z80pioB_0_p_r );
+WRITE8_HANDLER( z80pioA_1_p_w );
+WRITE8_HANDLER( z80pioB_1_p_w );
+READ8_HANDLER( z80pioA_1_p_r );
+READ8_HANDLER( z80pioB_1_p_r );
+
+
+
+/***************************************************************************
+ STROBE STATE MANAGEMENT
+***************************************************************************/
+
+void z80pio_astb_w(int which, int state);
+void z80pio_bstb_w(int which, int state);
+
+
+
+/***************************************************************************
+ DAISY CHAIN INTERFACE
+***************************************************************************/
+
+int z80pio_irq_state(int which);
+int z80pio_irq_ack(int which);
+void z80pio_irq_reti(int which);