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Annotation of ntddk/src/scsi/ncr53c9x/mcadefs.h, revision 1.1

1.1     ! root        1: /*++
        !             2: 
        !             3: Copyright (c) 1991  NCR Corporation
        !             4: 
        !             5: Module Name:
        !             6: 
        !             7:     mcadefs.h
        !             8: 
        !             9: Abstract:
        !            10: 
        !            11:     The module defines constants necessary for using the system dma
        !            12:     controller on microchannel machines
        !            13: 
        !            14: Author:
        !            15: 
        !            16:     David Risner (o-ncrdr) 10-Jun-1991
        !            17: 
        !            18: Revision History:
        !            19: 
        !            20: 
        !            21: --*/
        !            22: 
        !            23: 
        !            24: #ifndef _MCADEFS_
        !            25: #define _MCADEFS_
        !            26: 
        !            27: 
        !            28: //
        !            29: //     System Control Port definition
        !            30: //
        !            31: 
        !            32: #define SystemControlPortA 0x92
        !            33: 
        !            34: typedef struct _SYSTEM_PORT_A {
        !            35:     UCHAR AlternateHotReset   : 1;
        !            36:     UCHAR AlternateGateA20    : 1;
        !            37:     UCHAR Reserved0           : 1;
        !            38:     UCHAR WatchdogTimerStatus : 1;
        !            39:     UCHAR SecurityLockLatch   : 1;
        !            40:     UCHAR Reserved1           : 1;
        !            41:     UCHAR DiskActivityLight   : 2;
        !            42: } SYSTEM_PORT_A, *PSYSTEM_PORT_A;
        !            43: 
        !            44: 
        !            45: //
        !            46: // MicroChannel extended DMA functions
        !            47: //
        !            48: 
        !            49: #define MCA_DmaFunc          0x18   // extended function register
        !            50: #define MCA_DmaFuncExec      0x1a   // extended function execute
        !            51: 
        !            52: #define MCA_DmaIoAddrWr      0x00   // write I/O address reg
        !            53: #define MCA_DmaMemAddrWr     0x20   // write memory address reg
        !            54: #define MCA_DmaMemAddrRd     0x30   // read memory address reg
        !            55: #define MCA_DmaXfrCntWr      0x40   // write transfer count reg
        !            56: #define MCA_DmaXfrCntRd      0x50   // read transfer count reg
        !            57: #define MCA_DmaStatusRd      0x60   // read status register
        !            58: #define MCA_DmaMode          0x70   // access mode register
        !            59: #define MCA_DmaArbus         0x80   // access arbus register
        !            60: #define MCA_DmaMaskBitSet    0x90   // set bit in mask reg
        !            61: #define MCA_DmaMaskBitClr    0xa0   // clear bit in mask reg
        !            62: #define MCA_DmaMasterClr     0xd0   // master clear
        !            63: 
        !            64: //
        !            65: // DMA mode options
        !            66: //
        !            67: 
        !            68: #define MCA_Dma8Bits         0x00   // use 8 bit data
        !            69: #define MCA_Dma16Bits        0x40   // use 16 bit data
        !            70: #define MCA_DmaRead          0x00   // read data into memory
        !            71: #define MCA_DmaWrite         0x08   // write data from memory
        !            72: #define MCA_DmaVerify        0x00   // verify data
        !            73: #define MCA_DmaXfr           0x04   // transfer data
        !            74: #define MCA_DmaIoZero        0x00   // use I/O address 0000h
        !            75: #define MCA_DmaIoAddr        0x01   // use programed I/O address
        !            76: 
        !            77: 
        !            78: #endif

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