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308 lines
12 KiB
C
308 lines
12 KiB
C
#ifdef RLI
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#include "diverge.h"
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#endif
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/****************************************************************
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* *
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* CP/M-68K BDOS Main Routine *
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* *
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* This is the main routine for the BDOS for CP/M-68K *
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* It has one entry point, _bdos, which is called from *
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* the assembly language trap handler found in bdosif.s. *
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* The parameters are a function number (integer) and an *
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* information parameter (which is passed from bdosif as *
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* both an integer and a pointer). *
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* The BDOS can potentially return a pointer, long word, *
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* or word *
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* *
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* Configured for Alcyon C on the VAX *
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* *
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****************************************************************/
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#include "bdosinc.h" /* Standard I/O declarations */
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#include "bdosdef.h" /* Type and structure declarations for BDOS */
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#include "biosdef.h" /* Declarations of BIOS functions */
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/* Declare EXTERN functions */
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EXTERN warmboot(); /* Warm Boot function */
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EXTERN BOOLEAN constat(); /* Console status */
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EXTERN UBYTE conin(); /* Console Input function */
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EXTERN tabout(); /* Console output with tab expansion */
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EXTERN UBYTE rawconio(); /* Raw console I/O */
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EXTERN prt_line(); /* Print line until delimiter */
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EXTERN readline(); /* Buffered console read */
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EXTERN seldsk(); /* Select disk */
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EXTERN BOOLEAN openfile(); /* Open File */
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EXTERN UWORD close_fi(); /* Close File */
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EXTERN UWORD search(); /* Search first and next fcns */
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EXTERN UWORD dirscan(); /* General directory scanning routine */
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EXTERN UWORD bdosrw(); /* Sequential and Random disk read/write */
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EXTERN BOOLEAN create(); /* Create file */
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EXTERN BOOLEAN delete(); /* Delete file */
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EXTERN BOOLEAN rename(); /* Rename file */
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EXTERN BOOLEAN set_attr(); /* Set file attributes */
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EXTERN getsize(); /* Get File Size */
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EXTERN setran(); /* Set Random Record */
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EXTERN free_sp(); /* Get Disk Free Space */
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EXTERN UWORD flushit(); /* Flush Buffers */
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EXTERN UWORD pgmld(); /* Program Load */
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EXTERN UWORD setexc(); /* Set Exception Vector */
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EXTERN set_tpa(); /* Get/Set TPA Limits */
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EXTERN move(); /* general purpose byte mover */
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/* Declare "true" global variables; i.e., those which will pertain to the
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entire file system and thus will remain global even when this becomes
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a multi-tasking file system */
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GLOBAL UWORD log_dsk; /* 16-bit vector of logged in drives */
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GLOBAL UWORD ro_dsk; /* 16-bit vector of read-only drives */
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GLOBAL UWORD crit_dsk; /* 16-bit vector of drives in "critical"
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state. Used to control dir checksums */
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GLOBAL BYTE *tpa_lp; /* TPA lower boundary (permanent) */
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GLOBAL BYTE *tpa_lt; /* TPA lower boundary (temporary) */
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GLOBAL BYTE *tpa_hp; /* TPA upper boundary (permanent) */
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GLOBAL BYTE *tpa_ht; /* TPA upper boundary (temporary) */
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/* Declare the "state variables". These are globals for the single-thread
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version of the file system, but are put in a structure so they can be
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based, with a pointer coming from the calling process */
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GLOBAL struct stvars gbls;
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struct tempstr
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{
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UBYTE tempdisk;
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BOOLEAN reselect;
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struct fcb *fptr;
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};
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/****************************************************************
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* *
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* _bdos MAIN ROUTINE *
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* *
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* Called with _bdos(func, info, infop) *
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* *
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* Where: *
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* func is the BDOS function number (d0.w) *
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* info is the word parameter (d1.w) *
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* infop is the pointer parameter (d1.l) *
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* note that info is the word form of infop*
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* *
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****************************************************************/
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UWORD _bdos(func,info,infop)
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REG WORD func; /* BDOS function number */
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REG UWORD info; /* d1.w word parameter */
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REG UBYTE *infop; /* d1.l pointer parameter */
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{
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REG UWORD rtnval;
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LOCAL struct tempstr temp;
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BSETUP
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temp.reselect = FALSE;
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temp.fptr = (void *)infop;
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rtnval = 0;
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switch (func) /* switch on function number */
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{
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case 0: warmboot(0); /* warm boot function */
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/* break; */
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case 1: return((UWORD)conin()); /* console input function */
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/* break; */
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case 2: tabout((UBYTE)info); /* console output with */
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break; /* tab expansion */
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case 3: return((UWORD)brdr()); /* get reader from bios */
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/* break; */
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case 4: bpun((UBYTE)info); /* punch output to bios */
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break;
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case 5: blstout((UBYTE)info); /* list output from bios */
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break;
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case 6: return((UWORD)rawconio(info)); /* raw console I/O */
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/* break; */
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case 7: return(bgetiob()); /* get i/o byte */
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/* break; */
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case 8: bsetiob(info); /* set i/o byte function */
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break;
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case 9: prt_line(infop); /* print line function */
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break;
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case 10: readline(infop); /* read buffered con input */
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break;
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case 11: return((UWORD)constat()); /* console status */
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/* break; */
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case 12: return(VERSION); /* return version number */
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/* break; */
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case 13: log_dsk = 0; /* reset disk system */
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ro_dsk = 0;
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crit_dsk= 0;
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GBL.curdsk = 0xff;
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GBL.dfltdsk = 0;
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break;
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case 14: seldsk((UBYTE)info); /* select disk */
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GBL.dfltdsk = (UBYTE)info;
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break;
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case 15: tmp_sel(&temp); /* open file */
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((struct fcb *)infop)->extent = 0;
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((struct fcb *)infop)->s2 = 0;
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rtnval = dirscan(openfile, infop, 0);
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break;
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case 16: tmp_sel(&temp); /* close file */
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rtnval = close_fi(infop);
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break;
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case 17: GBL.srchp = (void *)infop; /* search first */
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rtnval = search(infop, 0, &temp);
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break;
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case 18: infop = (void *)GBL.srchp; /* search next */
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temp.fptr = (void *)infop;
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rtnval = search(infop, 1, &temp);
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break;
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case 19: tmp_sel(&temp); /* delete file */
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rtnval = dirscan(delete, infop, 2);
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break;
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case 20: tmp_sel(&temp); /* read sequential */
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rtnval = bdosrw(infop, TRUE, 0);
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break;
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case 21: tmp_sel(&temp); /* write sequential */
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rtnval = bdosrw(infop, FALSE, 0);
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break;
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case 22: tmp_sel(&temp); /* create file */
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((struct fcb *)infop)->extent = 0;
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((struct fcb *)infop)->s1 = 0;
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((struct fcb *)infop)->s2 = 0;
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((struct fcb *)infop)->rcdcnt = 0;
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/* Zero extent, S1, S2, rcrdcnt. create zeros rest */
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rtnval = dirscan(create, infop, 8);
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break;
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case 23: tmp_sel(&temp); /* rename file */
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rtnval = dirscan(rename, infop, 2);
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break;
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case 24: return(log_dsk); /* return login vector */
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/* break; */
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case 25: return(UBWORD(GBL.dfltdsk)); /* return current disk */
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/* break; */
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case 26: GBL.dmaadr = infop; /* set dma address */
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break;
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/* No function 27 -- Get Allocation Vector */
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case 28: ro_dsk |= 1<<GBL.dfltdsk; /* set disk read-only */
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break;
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case 29: return(ro_dsk); /* get read-only vector */
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/* break; */
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case 30: tmp_sel(&temp); /* set file attributes */
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rtnval = dirscan(set_attr, infop, 2);
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break;
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case 31: if (GBL.curdsk != GBL.dfltdsk) seldsk(GBL.dfltdsk);
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move( (GBL.parmp), infop, sizeof *(GBL.parmp) );
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break; /* return disk parameters */
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case 32: if ( (info & 0xff) <= 15 ) /* get/set user number */
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GBL.user = (UBYTE)info;
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return(UBWORD(GBL.user));
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/* break; */
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case 33: tmp_sel(&temp); /* random read */
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rtnval = bdosrw(infop, TRUE, 1);
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break;
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case 34: tmp_sel(&temp); /* random write */
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rtnval = bdosrw(infop, FALSE, 1);
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break;
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case 35: tmp_sel(&temp); /* get file size */
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getsize(infop);
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break;
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case 36: tmp_sel(&temp); /* set random record */
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setran(infop);
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break;
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case 37: info = ~info; /* reset drive */
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log_dsk &= info;
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ro_dsk &= info;
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crit_dsk &= info;
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break;
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case 40: tmp_sel(&temp); /* write random with 0 fill */
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rtnval = bdosrw(infop, FALSE, 2);
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break;
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case 46: free_sp(info); /* get disk free space */
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break;
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case 47: chainp = GBL.dmaadr; /*sw chain to program */
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warmboot(0); /* terminate calling program */
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/* break; */
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case 48: return( flushit() ); /* flush buffers */
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/* break; */
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case 59: return(pgmld(infop,GBL.dmaadr)); /* program load */
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/* break; */
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case 61: return(setexc(infop)); /* set exception vector */
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/* break; */
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case 63: set_tpa(infop); /* get/set TPA limits */
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break;
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default: return(-1); /* bad function number */
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/* break; */
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}; /* end of switch statement */
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if (temp.reselect) ((struct fcb *)infop)->drvcode = temp.tempdisk;
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/* if reselected disk, restore it now */
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return(rtnval); /* return the BDOS return value */
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} /* end _bdos */
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tmp_sel(temptr) /* temporarily select disk pointed to by fcb */
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REG struct tempstr *temptr;
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{
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REG struct fcb *fcbp;
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REG UBYTE tmp_dsk;
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BSETUP
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fcbp = temptr->fptr; /* get local copy of fcb pointer */
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tmp_dsk = (temptr->tempdisk = fcbp->drvcode);
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seldsk( tmp_dsk ? tmp_dsk - 1 : GBL.dfltdsk );
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fcbp->drvcode = GBL.user;
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temptr->reselect = TRUE;
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}
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