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Amiga Format CD 24
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Amiga Format AFCD24 (Feb 1998, Issue 108).iso
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-in_the_mag-
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emulation
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amiga
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uae-0.7.0b2
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src
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hardfile.c
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C/C++ Source or Header
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1998-01-20
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6KB
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260 lines
/*
* UAE - The Un*x Amiga Emulator
*
* AutoConfig devices
*
* (c) 1995 Bernd Schmidt
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "config.h"
#include "options.h"
#include "memory.h"
#include "custom.h"
#include "readcpu.h"
#include "newcpu.h"
#include "disk.h"
#include "autoconf.h"
#include "filesys.h"
#include "execlib.h"
static int opencount = 0;
static uae_u32 hardfile_open(void)
{
uaecptr tmp1 = m68k_areg(regs, 1); /* IOReq */
/* Check unit number */
if (get_hardfile_data (m68k_dreg (regs, 0))) {
opencount++;
put_word (m68k_areg(regs, 6)+32, get_word (m68k_areg(regs, 6)+32) + 1);
put_long (tmp1+24, m68k_dreg (regs, 0)); /* io_Unit */
put_byte (tmp1+31, 0); /* io_Error */
put_byte (tmp1+8, 7); /* ln_type = NT_REPLYMSG */
return 0;
}
put_long (tmp1+20, (uae_u32)-1);
put_byte (tmp1+31, (uae_u8)-1);
return (uae_u32)-1;
}
static uae_u32 hardfile_close(void)
{
opencount--;
put_word (m68k_areg(regs, 6)+32, get_word (m68k_areg(regs, 6)+32) - 1);
return 0;
}
static uae_u32 hardfile_expunge(void)
{
return 0; /* Simply ignore this one... */
}
static uae_u32 hardfile_beginio(void)
{
uae_u32 tmp1, tmp2, dataptr, offset;
uae_u32 retval = m68k_dreg(regs, 0);
int unit;
struct hardfiledata *hfd;
tmp1 = m68k_areg(regs, 1);
unit = get_long (tmp1 + 24);
#undef DEBUGME
#ifdef DEBUGME
printf ("hardfile: unit = %d\n", unit);
printf ("hardfile: tmp1 = %08lx\n", (unsigned long)tmp1);
printf ("hardfile: cmd = %d\n", (int)get_word(tmp1+28));
#endif
hfd = get_hardfile_data (unit);
put_byte (tmp1+8, NT_MESSAGE);
put_byte (tmp1+31, 0); /* no error yet */
tmp2 = get_word (tmp1+28); /* io_Command */
/* put_byte (tmp1 + 30, get_byte (tmp1 + 30) & ~1);*/
switch (tmp2) {
case CMD_READ:
dataptr = get_long (tmp1 + 40);
if (dataptr & 1)
goto bad_command;
offset = get_long (tmp1 + 44);
if (offset & 511)
goto bad_command;
tmp2 = get_long (tmp1 + 36); /* io_Length */
if (tmp2 & 511)
goto bad_command;
if (tmp2 + offset > (uae_u32)hfd->size)
goto bad_command;
put_long (tmp1 + 32, tmp2); /* set io_Actual */
fseek (hfd->fd, offset, SEEK_SET);
while (tmp2) {
int i;
char buffer[512];
fread (buffer, 1, 512, hfd->fd);
for (i = 0; i < 512; i++, dataptr++)
put_byte(dataptr, buffer[i]);
tmp2 -= 512;
}
break;
case CMD_WRITE:
case 11: /* Format */
dataptr = get_long (tmp1 + 40);
if (dataptr & 1)
goto bad_command;
offset = get_long (tmp1 + 44);
if (offset & 511)
goto bad_command;
tmp2 = get_long (tmp1 + 36); /* io_Length */
if (tmp2 & 511)
goto bad_command;
if (tmp2 + offset > (uae_u32)hfd->size)
goto bad_command;
put_long (tmp1 + 32, tmp2); /* set io_Actual */
fseek (hfd->fd, offset, SEEK_SET);
while (tmp2) {
char buffer[512];
int i;
for (i=0; i < 512; i++, dataptr++)
buffer[i] = get_byte(dataptr);
fwrite (buffer, 1, 512, hfd->fd);
tmp2 -= 512;
}
break;
bad_command:
break;
case 18: /* GetDriveType */
printf ("Shouldn't happen\n");
put_long (tmp1 + 32, 1); /* not exactly a 3.5" drive, but... */
break;
case 19: /* GetNumTracks */
printf ("Shouldn't happen 2\n");
put_long (tmp1 + 32, 0);
break;
/* Some commands that just do nothing and return zero */
case CMD_UPDATE:
case CMD_CLEAR:
case 9: /* Motor */
case 10: /* Seek */
case 12: /* Remove */
case 13: /* ChangeNum */
case 14: /* ChangeStatus */
case 15: /* ProtStatus */
case 20: /* AddChangeInt */
case 21: /* RemChangeInt */
put_long (tmp1+32, 0); /* io_Actual */
retval = 0;
break;
default:
/* Command not understood. */
put_byte (tmp1+31, (uae_u8)-3); /* io_Error */
retval = 0;
break;
}
#if 0
if ((get_byte (tmp1+30) & 1) == 0) {
/* Not IOF_QUICK -- need to ReplyMsg */
m68k_areg(regs, 1) = tmp1;
CallLib (get_long(4), -378);
}
#endif
return retval;
}
static uae_u32 hardfile_abortio(void)
{
return (uae_u32)-3;
}
void hardfile_install(void)
{
uae_u32 functable, datatable, inittable;
uae_u32 initcode, openfunc, closefunc, expungefunc;
uae_u32 beginiofunc, abortiofunc;
ROM_hardfile_resname = ds("uaehf.device");
ROM_hardfile_resid = ds("UAE hardfile.device 0.2");
/* initcode */
#if 0
initcode = here();
calltrap(deftrap(hardfile_init)); dw(RTS);
#else
initcode = filesys_initcode;
#endif
/* Open */
openfunc = here();
calltrap(deftrap(hardfile_open)); dw(RTS);
/* Close */
closefunc = here();
calltrap(deftrap(hardfile_close)); dw(RTS);
/* Expunge */
expungefunc = here();
calltrap(deftrap(hardfile_expunge)); dw(RTS);
/* BeginIO */
beginiofunc = here();
calltrap(deftrap(hardfile_beginio));
dw (0x48E7); dw (0x8002); /* movem.l d0/a6,-(a7) */
dw (0x0829); dw (0); dw (30); /* btst #0,30(a1) */
dw (0x6608); /* bne.b +8 */
dw (0x2C78); dw (0x0004); /* move.l 4,a6 */
dw (0x4EAE); dw (-378); /* jsr ReplyMsg(a6) */
dw (0x4CDF); dw (0x4001); /* movem.l (a7)+,d0/a6 */
dw(RTS);
/* AbortIO */
abortiofunc = here();
calltrap(deftrap(hardfile_abortio)); dw(RTS);
/* FuncTable */
functable = here();
dl(openfunc); /* Open */
dl(closefunc); /* Close */
dl(expungefunc); /* Expunge */
dl(EXPANSION_nullfunc); /* Null */
dl(beginiofunc); /* BeginIO */
dl(abortiofunc); /* AbortIO */
dl(0xFFFFFFFFul); /* end of table */
/* DataTable */
datatable = here();
dw(0xE000); /* INITBYTE */
dw(0x0008); /* LN_TYPE */
dw(0x0300); /* NT_DEVICE */
dw(0xC000); /* INITLONG */
dw(0x000A); /* LN_NAME */
dl(ROM_hardfile_resname);
dw(0xE000); /* INITBYTE */
dw(0x000E); /* LIB_FLAGS */
dw(0x0600); /* LIBF_SUMUSED | LIBF_CHANGED */
dw(0xD000); /* INITWORD */
dw(0x0014); /* LIB_VERSION */
dw(0x0004); /* 0.4 */
dw(0xD000);
dw(0x0016); /* LIB_REVISION */
dw(0x0000);
dw(0xC000);
dw(0x0018); /* LIB_IDSTRING */
dl(ROM_hardfile_resid);
dw(0x0000); /* end of table */
ROM_hardfile_init = here();
dl(0x00000100); /* ??? */
dl(functable);
dl(datatable);
dl(initcode);
}