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Annotation of ntddk/src/scsi/ncr53c9x/mcadefs.h, revision 1.1.1.1

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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