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-rw-r--r--src/mess/machine/ncr5380.h89
1 files changed, 89 insertions, 0 deletions
diff --git a/src/mess/machine/ncr5380.h b/src/mess/machine/ncr5380.h
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index 00000000000..7e1fcd96627
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+++ b/src/mess/machine/ncr5380.h
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+/*
+ * ncr5380.h SCSI controller
+ *
+ */
+
+#ifndef _NCR5380_H_
+#define _NCR5380_H_
+
+#include "machine/scsi.h"
+#include "machine/scsidev.h"
+
+struct NCR5380interface
+{
+ const SCSIConfigTable *scsidevs; /* SCSI devices */
+ void (*irq_callback)(running_machine &machine, int state); /* irq callback */
+};
+
+// 5380 registers
+enum
+{
+ R5380_CURDATA = 0, // current SCSI data (read only)
+ R5380_OUTDATA = 0, // output data (write only)
+ R5380_INICOMMAND, // initiator command
+ R5380_MODE, // mode
+ R5380_TARGETCMD, // target command
+ R5380_SELENABLE, // select enable (write only)
+ R5380_BUSSTATUS = R5380_SELENABLE, // bus status (read only)
+ R5380_STARTDMA, // start DMA send (write only)
+ R5380_BUSANDSTAT = R5380_STARTDMA, // bus and status (read only)
+ R5380_DMATARGET, // DMA target (write only)
+ R5380_INPUTDATA = R5380_DMATARGET, // input data (read only)
+ R5380_DMAINIRECV, // DMA initiator receive (write only)
+ R5380_RESETPARITY = R5380_DMAINIRECV // reset parity/interrupt (read only)
+};
+
+// special Mac Plus registers - they implemented it weird
+#define R5380_OUTDATA_DTACK (R5380_OUTDATA | 0x10)
+#define R5380_CURDATA_DTACK (R5380_CURDATA | 0x10)
+
+// device stuff
+#define MCFG_NCR5380_ADD(_tag, _clock, _intrf) \
+ MCFG_DEVICE_ADD(_tag, NCR5380, _clock) \
+ MCFG_DEVICE_CONFIG(_intrf)
+
+class ncr5380_device : public device_t,
+ public NCR5380interface
+{
+public:
+ // construction/destruction
+ ncr5380_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // our API
+ UINT8 ncr5380_read_reg(UINT32 offset);
+ void ncr5380_write_reg(UINT32 offset, UINT8 data);
+
+ void ncr5380_read_data(int bytes, UINT8 *pData);
+ void ncr5380_write_data(int bytes, UINT8 *pData);
+
+ void *ncr5380_get_scsi_device(int id);
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_stop();
+ virtual void device_config_complete();
+
+private:
+ scsidev_device *m_scsi_devices[8];
+
+ UINT8 m_5380_Registers[8];
+ UINT8 m_last_id;
+ UINT8 m_5380_Command[32];
+ INT32 m_cmd_ptr, m_d_ptr, m_d_limit, m_next_req_flag;
+ UINT8 m_5380_Data[512];
+};
+
+// device type definition
+extern const device_type NCR5380;
+
+/***************************************************************************
+ PROTOTYPES
+***************************************************************************/
+READ8_DEVICE_HANDLER(ncr5380_read_reg);
+WRITE8_DEVICE_HANDLER(ncr5380_write_reg);
+
+void ncr5380_read_data(device_t *dev, int bytes, UINT8 *pData);
+void ncr5380_write_data(device_t *dev, int bytes, UINT8 *pData);
+
+#endif