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61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/********************************************************
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* *
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* CP/M-68K header file *
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* Copyright (c) 1982 by Digital Research, Inc. *
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* Structure definitions for doing I/O in packets *
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* *
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********************************************************/
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/* May use this information structure instead of disk parameter header and
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disk parameter block in future, but for now it's unused
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struct dskinfo
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{
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UBYTE *dbuffp;
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UBYTE *csv;
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UBYTE *alv;
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UBYTE blksize;
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UBYTE didummy;
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UWORD dskmax;
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UWORD dirmax;
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UWORD chksize;
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};
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*/
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struct iopb
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{
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UBYTE iofcn; /* function number, see defines below */
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UBYTE ioflags; /* used for login flag and write flag */
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UBYTE devtype; /* device type, see defines below */
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/* currently unused */
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UBYTE devnum; /* device number, or, devtype and devnum
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taken together form int device number */
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LONG devadr; /* item nmbr on device to start xfer at */
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/* note -- item is sector for disks, byte for char devs */
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UWORD xferlen; /* number items to transfer */
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UBYTE *xferadr; /* memory address to xfer to/from */
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struct dph *infop; /* pointer to disk parameter header */
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/* return parm for fcn 0, input for rest */
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};
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/* Definitions for iofcn, the function number */
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#define sel_info 0 /* select and return info on device */
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#define read 1
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#define write 2
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#define flush 3
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#define status 4 /* not currently used */
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/* Definitions for devtype, the device type */
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/* This field not currently used */
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#define console 0
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#define printer 1
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#define disk 2
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#define memory 3 /* gets TPA boundaries */
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#define redir 4 /* read/write IOByte */
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#define exc_vec 5 /* set exception vector */
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#define redir 4 /* read/write IOByte */
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#define exc_vec 5 /* set exception vector */
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