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rcornwell.sims/IBM360/ibm360_dasd.c
Richard Cornwell eb4320e2e4 IBM360: Initial commit
2017-10-15 13:22:36 -04:00

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/* ibm360_dasd.c: IBM 360 2311/2314 Disk controller
Copyright (c) 2016, Richard Cornwell
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
RICHARD CORNWELL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Structure of a disk. See Hercules CKD disks.
Numbers are stored least to most significant.
Devid = "CKD_P370"
uint8 devid[8] device header.
uint32 heads number of heads per cylinder
uint32 tracksize size of track
uint8 devtype Hex code of last two digits of device type.
uint8 fileseq always 0.
uint16 highcyl highest cylinder.
uint8 resv[492] pad to 512 byte block
Each Track has:
uint8 bin Track header.
uint16 cyl Cylinder number
uint16 head Head number.
Each Record has:
uint16 cyl Cylinder number <- tpos
uint16 head Head number
uint8 rec Record id.
uint8 klen Length of key
uint16 dlen Length of data
uint8 key[klen] Key data.
uint8 data[dlen] Data len.
cpos points to where data is actually read/written from
Pad to being track to multiple of 512 bytes.
Last record has cyl and head = 0xffffffff
*/
#include "ibm360_defs.h"
#ifdef NUM_DEVS_DASD
#define UNIT_V_TYPE (UNIT_V_UF + 0)
#define UNIT_TYPE (0xf << UNIT_V_TYPE)
#define GET_TYPE(x) ((UNIT_TYPE & (x)) >> UNIT_V_TYPE)
#define SET_TYPE(x) (UNIT_TYPE & ((x) << UNIT_V_TYPE))
#define UNIT_DASD UNIT_ATTABLE | UNIT_DISABLE | UNIT_ROABLE | \
UNIT_FIX | SET_TYPE(6)
/* u3 */
#define DK_NOP 0x03 /* Nop operation */
#define DK_RELEASE 0x17 /* Release from channel */
#define DK_RESTORE 0x13 /* Restore */
#define DK_SEEK 0x07 /* Seek */
#define DK_SEEKCYL 0x0B /* Seek Cylinder */
#define DK_SEEKHD 0x1B /* Seek Head */
#define DK_SETMSK 0x1f /* Set file mask */
#define DK_SPACE 0x0f /* Space record */
#define DK_SRCH_HAEQ 0x39 /* Search HA equal */
#define DK_SRCH_IDEQ 0x31 /* Search ID equal */
#define DK_SRCH_IDGT 0x51 /* Search ID greater */
#define DK_SRCH_IDGE 0x71 /* Search ID greater or equal */
#define DK_SRCH_KYEQ 0x29 /* Search Key equal */
#define DK_SRCH_KYGT 0x49 /* Search Key greater */
#define DK_SRCH_KYGE 0x69 /* Search Key greater or equal */
#define DK_RD_IPL 0x02 /* Read IPL record */
#define DK_RD_HA 0x1A /* Read home address */
#define DK_RD_CNT 0x12 /* Read count */
#define DK_RD_R0 0x16 /* Read R0 */
#define DK_RD_D 0x06 /* Read Data */
#define DK_RD_KD 0x0e /* Read key and data */
#define DK_RD_CKD 0x1e /* Read count, key and data */
#define DK_WR_HA 0x19 /* Write home address */
#define DK_WR_R0 0x15 /* Write R0 */
#define DK_WR_D 0x05 /* Write Data */
#define DK_WR_KD 0x0d /* Write key and data */
#define DK_WR_CKD 0x1d /* Write count, key and data */
#define DK_WR_SCKD 0x01 /* Write special count, key and data */
#define DK_ERASE 0x11 /* Erase to end of track */
#define DK_MT 0x80 /* Multi track flag */
#define DK_INDEX 0x100 /* Index seen in command */
#define DK_NOEQ 0x200 /* Not equal compare */
#define DK_HIGH 0x400 /* High compare */
#define DK_PARAM 0x800 /* Parameter in u4 */
#define DK_MSET 0x1000 /* Mode set command already */
#define DK_SHORTSRC 0x2000 /* Last search was short */
#define DK_SRCOK 0x4000 /* Last search good */
#define DK_CYL_DIRTY 0x8000 /* Current cylinder dirty */
#define DK_MSK_INHWR0 0x00 /* Inhbit writing of HA/R0 */
#define DK_MSK_INHWRT 0x40 /* Inhbit all writes */
#define DK_MSK_ALLWRU 0x80 /* Allow all updates */
#define DK_MSK_ALLWRT 0xc0 /* Allow all writes */
#define DK_MSK_WRT 0xc0 /* Write mask */
#define DK_MSK_SKALLSKR 0x00 /* Allow all seek/recal */
#define DK_MSK_SKALLCLY 0x08 /* Allow cyl/head only */
#define DK_MSK_SKALLHD 0x10 /* Allow head only */
#define DK_MSK_SKNONE 0x18 /* Allow no seeks */
#define DK_MSK_SK 0x18 /* Seek mask */
/* u4 */
/* Holds the current track and head */
#define DK_V_TRACK 8
#define DK_M_TRACK 0x3ff00 /* Max 1024 cylinders */
#define DK_V_HEAD 0
#define DK_M_HEAD 0xff /* Max 256 heads */
#define DK_V_FILEMSK 18
#define DK_M_FILEMSK 0xFF /* File mask */
/* u5 */
/* Sense byte 0 */
#define SNS_CMDREJ 0x01 /* Command reject */
#define SNS_INTVENT 0x02 /* Unit intervention required */
#define SNS_BUSCHK 0x04 /* Parity error on bus */
#define SNS_EQUCHK 0x08 /* Equipment check */
#define SNS_DATCHK 0x10 /* Data Check */
#define SNS_OVRRUN 0x20 /* Data overrun */
#define SNS_TRKCND 0x40 /* Track Condition */
#define SNS_SEEKCK 0x80 /* Seek Check */
/* Sense byte 1 */
#define SNS_DCCNT 0x01 /* Data Check Count */
#define SNS_TRKOVR 0x02 /* Track Overrun */
#define SNS_ENDCYL 0x04 /* End of Cylinder */
#define SNS_INVSEQ 0x08 /* Invalid Sequence */
#define SNS_NOREC 0x10 /* No record found */
#define SNS_WRP 0x20 /* Write Protect */
#define SNS_ADDR 0x40 /* Missing Address Mark */
#define SNS_OVRINC 0x80 /* Overflow Incomplete */
/* Sense byte 2 */
#define SNS_BYTE2 0x00 /* Diags Use */
/* Sense byte 3 */
#define SNS_BYTE3 0x00 /* Diags Use */
/* saved in state field of data */
/* Record position, high 4 bits, low internal short count */
#define DK_POS_INDEX 0x00 /* At Index Mark */
#define DK_POS_HA 0x10 /* In home address (c) */
#define DK_POS_CNT 0x20 /* In count (c) */
#define DK_POS_KEY 0x30 /* In Key area */
#define DK_POS_DATA 0x40 /* In Data area */
#define DK_POS_AM 0x50 /* Address mark before record */
#define DK_POS_END 0x80 /* Past end of data */
#define DK_POS_SEEK 0xF0 /* In seek */
/* u6 holds last command */
/* Held in ccyl entry */
/* Pointer held in up7 */
struct dasd_t
{
uint8 *cbuf; /* Cylinder buffer */
uint32 cpos; /* Position of head of cylinder in file */
uint32 tstart; /* Location of start of track */
uint16 ccyl; /* Current Cylinder number */
uint16 cyl; /* Cylinder head at */
uint16 tpos; /* Track position */
uint16 rpos; /* Start of current record */
uint16 dlen; /* remaining in data */
uint16 tsize; /* Size of one track include rounding */
uint8 state; /* Current state */
uint8 klen; /* remaining in key */
uint8 filemsk; /* Current file mask */
uint8 rec; /* Current record number */
uint16 count; /* Remaining in current operation */
};
struct disk_t
{
char *name; /* Type Name */
int cyl; /* Number of cylinders */
int heads; /* Number of heads/cylinder */
unsigned int bpt; /* Max bytes per track */
uint8 dev_type; /* Device type code */
}
disk_type[] =
{
{"2301", 1, 200, 20483, 0x01}, /* 4.1 M */
{"2302", 250, 46, 4984, 0x02}, /* 57.32 M 50ms, 120ms/10, 180ms> 10 */
{"2303", 80, 10, 4984, 0x03}, /* 4.00 M */
{"2305", 48, 8, 14568, 0x05}, /* 5.43 M */
{"2305-2",96, 8, 14858, 0x05}, /* 11.26 M */
{"2311", 202, 10, 3625, 0x11}, /* 7.32 M 156k/s 30 ms 145 full */
{"2314", 203, 20, 7294, 0x14}, /* 29.17 M */
{"3330", 411, 19, 13165, 0x30}, /* 100.00 M */
{"3330-2",815, 19, 13165, 0x30},
#if 0
{"3340", 349, 12, 8535}, /* 34.94 M */
{"3340-2",698, 12, 8535}, /* 69.89 M */
{"3350", 560, 12, 19254}, /* */
#endif
{NULL, 0}
};
/* Header block */
struct dasd_header
{
uint8 devid[8]; /* device header. */
uint32 heads; /* number of heads per cylinder */
uint32 tracksize; /* size of track */
uint8 devtype; /* Hex code of last two digits of device type. */
uint8 fileseq; /* always 0. */
uint16 highcyl; /* highest cylinder. */
uint8 resv[492]; /* pad to 512 byte block */
};
uint8 dasd_startio(UNIT *uptr, uint16 chan) ;
uint8 dasd_startcmd(UNIT *uptr, uint16 chan, uint8 cmd) ;
uint8 dasd_haltio(uint16 addr);
t_stat dasd_srv(UNIT *);
t_stat dasd_boot(int32, DEVICE *);
void dasd_ini(UNIT *, t_bool);
t_stat dasd_reset(DEVICE *);
t_stat dasd_attach(UNIT *, CONST char *);
t_stat dasd_detach(UNIT *);
t_stat dasd_boot(int32, DEVICE *);
t_stat dasd_set_type(UNIT * uptr, int32 val, CONST char *cptr,
void *desc);
t_stat dasd_get_type(FILE * st, UNIT * uptr, int32 v,
CONST void *desc);
t_stat dasd_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag,
const char *cptr);
const char *dasd_description (DEVICE *dptr);
MTAB dasd_mod[] = {
{MTAB_XTD | MTAB_VUN | MTAB_VALR, 0, "TYPE", "TYPE",
&dasd_set_type, &dasd_get_type, NULL, "Type of disk"},
{MTAB_XTD | MTAB_VUN | MTAB_VALR, 0, "DEV", "DEV", &set_dev_addr,
&show_dev_addr, NULL},
{0}
};
UNIT dda_unit[] = {
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x130)}, /* 0 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x131)}, /* 1 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x132)}, /* 2 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x133)}, /* 3 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x134)}, /* 4 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x135)}, /* 5 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x136)}, /* 6 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x137)}, /* 7 */
};
struct dib dda_dib = { 0xF8, NUM_UNITS_MT, NULL, dasd_startcmd, NULL, dda_unit, dasd_ini};
DEVICE dda_dev = {
"DA", dda_unit, NULL, dasd_mod,
NUM_UNITS_DASD, 8, 15, 1, 8, 8,
NULL, NULL, &dasd_reset, &dasd_boot, &dasd_attach, &dasd_detach,
&dda_dib, DEV_DISABLE | DEV_DEBUG, 0, dev_debug,
NULL, NULL, &dasd_help, NULL, NULL, &dasd_description
};
#if NUM_DEVS_DASD > 1
UNIT ddb_unit[] = {
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x230)}, /* 0 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x231)}, /* 1 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x232)}, /* 2 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x233)}, /* 3 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x234)}, /* 4 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x235)}, /* 5 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x236)}, /* 6 */
{UDATA(&dasd_srv, UNIT_DASD, 0), 0, UNIT_ADDR(0x237)}, /* 7 */
};
struct dib ddb_dib = { 0xF8, NUM_UNITS_MT, NULL, dasd_startcmd, NULL, ddb_unit, dasd_ini};
DEVICE ddb_dev = {
"DB", ddb_unit, NULL, dasd_mod,
NUM_UNITS_DASD, 8, 15, 1, 8, 8,
NULL, NULL, &dasd_reset, &dasd_boot, &dasd_attach, &dasd_detach,
&ddb_dib, DEV_DISABLE | DEV_DEBUG, 0, dev_debug,
NULL, NULL, &dasd_help, NULL, NULL, &dasd_description
};
#endif
uint8 dasd_startio(UNIT *uptr, uint16 chan) {
uint16 addr = GET_UADDR(uptr->u3);
DEVICE *dptr = find_dev_from_unit(uptr);
int unit = (uptr - dptr->units);
if ((uptr->u3 & 0xff) != 0) {
return SNS_BSY;
}
uptr->u3 &= ~(DK_INDEX|DK_NOEQ|DK_HIGH|DK_PARAM|DK_MSET);
uptr->u4 &= ~(DK_M_FILEMSK << DK_V_FILEMSK);
sim_debug(DEBUG_CMD, dptr, "start io unit=%d\n", unit);
return 0;
}
uint8 dasd_startcmd(UNIT *uptr, uint16 chan, uint8 cmd) {
uint16 addr = GET_UADDR(uptr->u3);
DEVICE *dptr = find_dev_from_unit(uptr);
int unit = (uptr - dptr->units);
uint8 ch;
if ((uptr->u3 & 0xff) != 0) {
return SNS_BSY;
}
sim_debug(DEBUG_CMD, dptr, "CMD unit=%d %02x\n", unit, cmd);
switch (cmd & 0x3) {
case 0x3: /* Control */
if ((cmd & 0xfc) == 0 || cmd == DK_RELEASE)
return SNS_CHNEND|SNS_DEVEND;
case 0x1: /* Write command */
case 0x2: /* Read command */
uptr->u3 |= cmd;
return 0;
case 0x0: /* Status */
if (cmd == 0x4) { /* Sense */
uptr->u3 |= cmd;
return 0;
}
break;
}
if (uptr->u5 & 0xff)
return SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK;
return SNS_CHNEND|SNS_DEVEND;
}
/* Handle processing of disk requests. */
t_stat dasd_srv(UNIT * uptr)
{
uint16 addr = GET_UADDR(uptr->u3);
DEVICE *dptr = find_dev_from_unit(uptr);
struct dasd_t *data = (struct dasd_t *)(uptr->up7);
int unit = (uptr - dptr->units);
int cmd = uptr->u3 & 0xff;
int type = GET_TYPE(uptr->flags);
int state = data->state;
int trk;
int i;
int rd = ((cmd & 0x3) == 0x1) | ((cmd & 0x3) == 0x2);
uint8 *rec;
uint8 ch;
uint8 buf[8];
/* Check if read or write command, if so grab correct cylinder */
if (rd && data->cyl != data->ccyl) {
int tsize = data->tsize * disk_type[type].heads;
if (uptr->u3 & DK_CYL_DIRTY) {
sim_fseek(uptr->fileref, data->cpos, SEEK_SET);
sim_fwrite(data->cbuf, 1, tsize, uptr->fileref);
uptr->u3 &= ~DK_CYL_DIRTY;
}
data->ccyl = data->cyl;
data->cpos = sizeof(struct dasd_header) + (data->ccyl * tsize);
sim_fseek(uptr->fileref, data->cpos, SEEK_SET);
sim_fread(data->cbuf, 1, tsize, uptr->fileref);
}
switch(state & 0xF0) {
case DK_POS_INDEX: /* At Index Mark */
/* Read and multi-track advance to next head */
if ((cmd & 0x83) == 0x81) {
data->tstart += data->tsize;
uptr->u4 ++;
uptr->u3 &= ~DK_INDEX;
}
if (data->tstart > (data->tsize * disk_type[type].heads)) {
uptr->u5 |= (SNS_ENDCYL << 8);
data->tstart = 0;
uptr->u4 &= ~0xff;
uptr->u3 &= ~0xff;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
/* If INDEX set signal no record if read */
if (rd && uptr->u3 & DK_INDEX) {
uptr->u5 |= (SNS_NOREC << 8);
uptr->u3 &= ~0xff;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
uptr->u3 |= DK_INDEX;
data->tpos = data->rpos = 0;
data->state = DK_POS_HA;
data->rec = 0;
sim_activate(uptr, 100);
break;
case DK_POS_HA: /* In home address (c) */
data->tpos = data->count;
if (data->count == 5) {
data->rpos = 5;
data->state = DK_POS_CNT;
rec = &data->cbuf[data->rpos];
/* Check for end of track */
if ((rec[0] & rec[1] & rec[2] & rec[3]) == 0xff)
data->state = DK_POS_END;
sim_activate(uptr, 100);
} else
sim_activate(uptr, 20);
break;
case DK_POS_CNT: /* In count (c) */
data->tpos++;
if (data->count == 8) {
rec = &data->cbuf[data->rpos];
/* Check for end of track */
if ((rec[0] & rec[1] & rec[2] & rec[3]) == 0xff) {
state = DK_POS_END;
data->state = DK_POS_END;
}
data->klen = rec[5];
data->dlen = (rec[6] << 8) | rec[7];
data->state = DK_POS_KEY;
if (data->klen == 0)
data->state = DK_POS_DATA;
sim_activate(uptr, 100);
} else {
sim_activate(uptr, 20);
}
break;
case DK_POS_KEY: /* In Key area */
if (data->count == data->klen) {
data->state = DK_POS_DATA;
sim_activate(uptr, 100);
} else {
sim_activate(uptr, 20);
data->tpos++;
}
break;
case DK_POS_DATA: /* In Data area */
if (data->count == data->dlen) {
data->state = DK_POS_AM;
sim_activate(uptr, 100);
} else {
data->tpos++;
sim_activate(uptr, 20);
}
break;
case DK_POS_AM: /* Beginning of record */
data->rpos += data->dlen + data->klen + 8;
data->rec++;
data->state = DK_POS_CNT;
rec = &data->cbuf[data->rpos];
/* Check for end of track */
if ((rec[0] & rec[1] & rec[2] & rec[3]) == 0xff)
data->state = DK_POS_END;
sim_activate(uptr, 100);
break;
case DK_POS_END: /* Past end of data */
data->tpos++;
data->count = 0;
data->klen = 0;
data->dlen = 0;
if (data->tpos >= data->tsize) {
data->state = DK_POS_INDEX;
sim_activate(uptr, 100);
} else
sim_activate(uptr, 20);
break;
case DK_POS_SEEK: /* In seek */
/* Compute delay based of difference. */
/* Set next state = index */
i = (uptr->u4 >> 8) - data->cyl;
if (i == 0) {
data->state = DK_POS_INDEX;
set_devattn(addr, SNS_DEVEND);
sim_activate(uptr, 100);
} else if (i > 0 ) {
if (i > 10) {
data->cyl += 10;
sim_activate(uptr, 4000);
} else {
data->cyl ++;
sim_activate(uptr, 500);
}
} else {
if (i < 10) {
data->cyl -= 10;
sim_activate(uptr, 4000);
} else {
data->cyl --;
sim_activate(uptr, 500);
}
}
break;
}
switch (cmd & 0x7f) {
case 0: /* No command, stop tape */
sim_debug(DEBUG_DETAIL, dptr, "Idle unit=%d\n", unit);
break;
case 0x4:
ch = uptr->u5 & 0xff;
sim_debug(DEBUG_DETAIL, dptr, "sense unit=%d 1 %x\n", unit, ch);
chan_write_byte(addr, &ch) ;
ch = (uptr->u5 >> 8) & 0xff;
sim_debug(DEBUG_DETAIL, dptr, "sense unit=%d 2 %x\n", unit, ch);
chan_write_byte(addr, &ch) ;
ch = 0;
sim_debug(DEBUG_DETAIL, dptr, "sense unit=%d 3 %x\n", unit, ch);
chan_write_byte(addr, &ch) ;
ch = unit;
sim_debug(DEBUG_DETAIL, dptr, "sense unit=%d 4 %x\n", unit, ch);
chan_write_byte(addr, &ch) ;
ch = 0;
chan_write_byte(addr, &ch) ;
uptr->u3 &= ~0xff;
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
break;
case DK_SEEK: /* Seek */
case DK_SEEKCYL: /* Seek Cylinder */
case DK_SEEKHD: /* Seek Head */
if ((uptr->u3 & DK_PARAM) != 0) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_DEVEND);
break;
}
/* Check if seek valid */
i = data->filemsk & DK_MSK_SK;
if (i == DK_MSK_SKNONE) { /* No seeks allowed, error out */
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
uptr->u5 |= SNS_CMDREJ;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (i != DK_MSK_SKALLSKR) { /* Some restrictions */
if ((cmd == DK_SEEKHD && i != DK_MSK_SKALLHD) || (cmd == DK_SEEK)) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
uptr->u5 |= SNS_CMDREJ;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
}
/* Read in 6 character seek code */
for (i = 0; i < 6; i++) {
if (chan_read_byte(addr, &buf[i])) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
uptr->u5 |= SNS_CMDREJ|SNS_SEEKCK;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
}
trk = (buf[2] << 8) | buf[3];
/* Check if seek valid */
if ((buf[0] | buf[1] | buf[4]) != 0 || trk == 0 ||
trk > disk_type[type].cyl || buf[5] > disk_type[type].heads) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
uptr->u5 |= SNS_CMDREJ|SNS_SEEKCK;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (cmd == DK_SEEKHD && ((uptr->u4 >> 8) & 0x7fff) != trk) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
uptr->u5 |= SNS_CMDREJ|SNS_SEEKCK;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
chan_end(addr, SNS_CHNEND);
uptr->u3 |= DK_PARAM;
data->tstart = buf[5] * data->tsize; /* Point to start of record */
uptr->u4 = (trk << 8) | buf[5];
/* Check if on correct cylinder */
if (trk != data->cyl) {
/* Do seek */
data->state = DK_POS_SEEK;
}
return SCPE_OK;
case DK_RESTORE: /* Restore */
if ((uptr->u3 & DK_PARAM) != 0) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_DEVEND);
break;
}
if ((data->filemsk & DK_MSK_SK) != DK_MSK_SKALLSKR) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
uptr->u3 |= DK_PARAM;
uptr->u4 = 0;
data->tstart = 0;
chan_end(addr, SNS_CHNEND);
if (data->cyl != 0) {
/* Do a seek */
data->state = DK_POS_SEEK;
}
return SCPE_OK;
case DK_SETMSK: /* Set file mask */
/* If mask already set, error */
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
if (uptr->u3 & DK_MSET) {
uptr->u6 = 0;
uptr->u5 |= SNS_CMDREJ | (SNS_INVSEQ << 8);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
/* Grab mask */
if (chan_read_byte(addr, &ch)) {
uptr->u6 = 0;
uptr->u5 |= SNS_CMDREJ;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
/* Save */
if ((ch & ~(DK_MSK_SK|DK_MSK_WRT)) != 0) {
uptr->u6 = 0;
uptr->u5 |= SNS_CMDREJ;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
data->filemsk = ch;
uptr->u3 |= DK_MSET;
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
break;
case DK_SPACE: /* Space record */
break;
case DK_SRCH_HAEQ: /* Search HA equal */
if (state == DK_POS_INDEX) {
uptr->u3 &= ~DK_SRCOK;
uptr->u3 |= DK_PARAM;
break;
}
if (uptr->u3 & DK_PARAM && state == DK_POS_HA) {
uptr->u3 &= ~DK_INDEX;
if (chan_read_byte(addr, &ch)) {
if (data->count != 0x5)
uptr->u3 |= DK_SHORTSRC;
} else if (ch != data->cbuf[data->tpos]) {
uptr->u3 |= DK_NOEQ;
}
if (data->count == 5 || uptr->u3 & DK_SHORTSRC) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
if (uptr->u3 & DK_NOEQ)
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
else {
uptr->u3 |= DK_SRCOK;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_SMS);
}
}
}
break;
case DK_RD_CNT: /* Read count */
if (state == DK_POS_AM) {
uptr->u3 |= DK_PARAM;
}
if (uptr->u3 & DK_PARAM && state == DK_POS_CNT) {
uptr->u3 &= ~DK_INDEX;
ch = data->cbuf[data->tpos];
if (chan_write_byte(addr, &ch) || data->count == 8) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
}
}
break;
case DK_SRCH_IDEQ: /* Search ID equal */
case DK_SRCH_IDGT: /* Search ID greater */
case DK_SRCH_IDGE: /* Search ID greater or equal */
if (state == DK_POS_CNT) {
uptr->u3 &= ~(DK_SRCOK|DK_SHORTSRC);
uptr->u3 |= DK_PARAM;
}
if (uptr->u3 & DK_PARAM) {
uptr->u3 &= ~DK_INDEX;
/* Wait for start of record */
if (chan_read_byte(addr, &ch)) {
uptr->u3 |= DK_SHORTSRC;
} else if (ch != data->cbuf[data->tpos]) {
if ((uptr->u3 & DK_NOEQ) == 0) {
uptr->u3 |= DK_NOEQ;
if (ch > *rec)
uptr->u3 |= DK_HIGH;
}
}
if (data->count == 5 || uptr->u3 & DK_SHORTSRC) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
i = 0;
if ((cmd & 0x2) && (uptr->u3 & DK_NOEQ) == 0)
i = SNS_SMS;
if ((cmd & 0x4) && (uptr->u3 & DK_HIGH))
i = SNS_SMS;
if (i)
uptr->u3 |= DK_SRCOK;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|i);
}
}
break;
case DK_SRCH_KYEQ: /* Search Key equal */
case DK_SRCH_KYGT: /* Search Key greater */
case DK_SRCH_KYGE: /* Search Key greater or equal */
if (state == DK_POS_AM)
uptr->u3 &= ~DK_SRCOK;
if (state == DK_POS_KEY && data->count == 0) {
if (data->rec == 0 && (uptr->u3 & DK_SRCOK) == 0)
break;
uptr->u3 &= ~(DK_SRCOK|DK_SHORTSRC);
uptr->u3 |= DK_PARAM;
}
if (uptr->u3 & DK_PARAM) {
/* Wait for key */
if (chan_read_byte(addr, &ch)) {
uptr->u3 |= DK_SHORTSRC;
} else if (ch != data->cbuf[data->tpos]) {
if ((uptr->u3 & DK_NOEQ) == 0) {
uptr->u3 |= DK_NOEQ;
if (ch > *rec)
uptr->u3 |= DK_HIGH;
}
}
if (data->count == data->klen || uptr->u3 & DK_SHORTSRC) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
i = 0;
if ((cmd & 0x2) && (uptr->u3 & DK_NOEQ) == 0)
i = SNS_SMS;
if ((cmd & 0x4) && (uptr->u3 & DK_HIGH))
i = SNS_SMS;
if (i)
uptr->u3 |= DK_SRCOK;
chan_end(addr, SNS_CHNEND|SNS_DEVEND|i);
}
}
break;
case DK_RD_HA: /* Read home address */
if (state == DK_POS_INDEX) {
uptr->u3 |= DK_PARAM;
}
if (uptr->u3 & DK_PARAM && (state & 0xF0) == DK_POS_HA) {
uptr->u3 &= ~DK_INDEX;
ch = data->cbuf[data->tpos];
if (chan_write_byte(addr, &ch) || (state & 0xF) == 5) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
}
}
break;
case DK_RD_IPL: /* Read IPL record */
if (data->count == 0 && state == DK_POS_CNT && data->rec == 1) {
uptr->u3 &= ~DK_INDEX;
uptr->u3 |= DK_PARAM;
}
case DK_RD_R0: /* Read R0 */
if (data->count == 0 && state == DK_POS_CNT && data->rec == 0) {
uptr->u3 |= DK_PARAM;
uptr->u3 &= ~DK_INDEX;
}
goto rd;
case DK_RD_CKD: /* Read count, key and data */
if (data->count == 0 && state == DK_POS_CNT) {
uptr->u3 |= DK_PARAM;
uptr->u3 &= ~DK_INDEX;
}
case DK_RD_KD: /* Read key and data */
if (data->count == 0 && state == DK_POS_KEY) {
uptr->u3 |= DK_PARAM;
uptr->u3 &= ~DK_INDEX;
}
case DK_RD_D: /* Read Data */
if (data->count == 0 && state == DK_POS_DATA) {
uptr->u3 |= DK_PARAM;
uptr->u3 &= ~DK_INDEX;
}
rd:
if (uptr->u3 & DK_PARAM) {
/* Check for end of file */
if (state == DK_POS_DATA && data->count == 0 && data->dlen == 0) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITEXP);
break;
}
ch = data->cbuf[data->tpos];
if (chan_write_byte(addr, &ch)) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
}
if (state == DK_POS_DATA && data->count == data->dlen) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
}
}
break;
case DK_WR_HA: /* Write home address */
if (state == DK_POS_INDEX) {
/* Check if command ok based on mask */
if ((data->filemsk & DK_MSK_WRT) != DK_MSK_ALLWRT) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
uptr->u3 |= DK_PARAM;
break;
}
if (uptr->u3 & DK_PARAM) {
uptr->u3 &= ~DK_INDEX;
if (chan_read_byte(addr, &ch)) {
ch = 0;
}
data->cbuf[data->tpos] = ch;
if (data->count == 5) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
for(i = 0; i < 4; i++)
data->cbuf[data->tpos+i] = 0xff;
for(; i < 8; i++)
data->cbuf[data->tpos+i] = 0;
}
}
break;
case DK_WR_R0: /* Write R0 */
if ((state == DK_POS_CNT || state == DK_POS_END)
&& data->rec == 0 && data->count == 0) {
/* Check if command ok based on mask */
if ((data->filemsk & DK_MSK_WRT) != DK_MSK_ALLWRT) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (uptr->u6 == DK_WR_HA ||
(uptr->u6 == DK_SRCH_HAEQ &&
(uptr->u3 & (DK_SHORTSRC|DK_SRCOK)) == DK_SRCOK)) {
state = data->state = DK_POS_CNT;
uptr->u3 |= DK_PARAM;
} else {
uptr->u5 |= SNS_CMDREJ | (SNS_INVSEQ << 8);
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
}
goto wrckd;
case DK_WR_SCKD: /* Write special count, key and data */
case DK_WR_CKD: /* Write count, key and data */
if ((state == DK_POS_CNT || state == DK_POS_END)
&& data->rec != 0 && data->count == 0) {
/* Check if command ok based on mask */
i = data->filemsk & DK_MSK_WRT;
if (i != DK_MSK_ALLWRT || i != DK_MSK_INHWR0) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (uptr->u6 == DK_WR_R0 || uptr->u6 == DK_WR_CKD ||
((uptr->u6 & 0x3) == 1 && (uptr->u6 & 0xE0) != 0 &&
(uptr->u3 & (DK_SHORTSRC|DK_SRCOK)) == DK_SRCOK)) {
state = data->state = DK_POS_CNT;
uptr->u3 |= DK_PARAM;
} else {
uptr->u5 |= SNS_CMDREJ | (SNS_INVSEQ << 8);
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
}
wrckd:
if (uptr->u3 & DK_PARAM) {
uptr->u3 &= ~DK_INDEX;
if (chan_read_byte(addr, &ch)) {
ch = 0;
}
data->cbuf[data->tpos] = ch;
if (state == DK_POS_CNT && data->count == 8) {
rec = &data->cbuf[data->rpos];
data->klen = rec[5];
data->dlen = (rec[6] << 8) | rec[7];
data->state = DK_POS_KEY;
if (data->klen == 0)
data->state = DK_POS_DATA;
} else if (state == DK_POS_DATA && data->count == data->dlen) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
for(i = 0; i < 4; i++)
data->cbuf[data->tpos+i] = 0xff;
for(; i < 8; i++)
data->cbuf[data->tpos+i] = 0;
}
}
break;
case DK_WR_KD: /* Write key and data */
if ((state == DK_POS_KEY) && data->rec != 0 && data->count == 0) {
/* Check if command ok based on mask */
if ((data->filemsk & DK_MSK_WRT) == DK_MSK_INHWRT) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (((uptr->u6 & 0x13) == 0x11 &&
(uptr->u3 & (DK_SHORTSRC|DK_SRCOK)) == DK_SRCOK)) {
uptr->u3 |= DK_PARAM;
} else {
uptr->u5 |= SNS_CMDREJ | (SNS_INVSEQ << 8);
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
}
goto wr;
case DK_WR_D: /* Write Data */
if ((state == DK_POS_DATA) && data->rec != 0 && data->count == 0) {
/* Check if command ok based on mask */
if ((data->filemsk & DK_MSK_WRT) == DK_MSK_INHWRT) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (((uptr->u6 & 0x3) == 1 && (uptr->u6 & 0xE0) != 0 &&
(uptr->u3 & (DK_SHORTSRC|DK_SRCOK)) == DK_SRCOK)) {
uptr->u3 |= DK_PARAM;
} else {
uptr->u5 |= SNS_CMDREJ | (SNS_INVSEQ << 8);
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
}
wr:
if (uptr->u3 & DK_PARAM) {
uptr->u3 &= ~DK_INDEX;
/* Check for end of file */
if (state == DK_POS_DATA && data->count == 0 && data->dlen == 0) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITEXP);
break;
}
if (chan_read_byte(addr, &ch)) {
ch = 0;
}
data->cbuf[data->tpos] = ch;
if (state == DK_POS_DATA && data->count == data->dlen) {
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
}
}
break;
case DK_ERASE: /* Erase to end of track */
if (state == DK_POS_AM || state == DK_POS_END) {
/* Check if command ok based on mask */
i = data->filemsk & DK_MSK_WRT;
if (i != DK_MSK_ALLWRT || i != DK_MSK_INHWR0) {
uptr->u5 |= SNS_CMDREJ;
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
break;
}
if (uptr->u6 == DK_WR_R0 || uptr->u6 == DK_WR_CKD ||
((uptr->u6 & 0x3) == 1 && (uptr->u6 & 0xE0) != 0 &&
(uptr->u3 & (DK_SHORTSRC|DK_SRCOK)) == DK_SRCOK)) {
state = data->state = DK_POS_END;
uptr->u3 |= DK_PARAM;
} else {
uptr->u5 |= SNS_CMDREJ | (SNS_INVSEQ << 8);
uptr->u6 = 0;
uptr->u3 &= ~(0xff);
chan_end(addr, SNS_CHNEND|SNS_DEVEND|SNS_UNITCHK);
}
}
if (uptr->u3 & DK_PARAM) {
uptr->u3 &= ~DK_INDEX;
uptr->u6 = uptr->u3 & 0xff;
uptr->u3 &= ~(0xff|DK_PARAM);
chan_end(addr, SNS_CHNEND|SNS_DEVEND);
/* Write end mark */
for(i = 0; i < 4; i++)
data->cbuf[data->rpos+i] = 0xff;
for(; i < 8; i++)
data->cbuf[data->rpos+i] = 0;
}
break;
}
if (state == data->state)
data->count++;
else
data->count = 0;
return SCPE_OK;
}
void
dasd_ini(UNIT * uptr, t_bool f)
{
DEVICE *dptr = find_dev_from_unit(uptr);
int i = GET_TYPE(uptr->flags);
uptr->capac = disk_type[i].bpt * disk_type[i].heads * disk_type[i].cyl;
}
t_stat
dasd_reset(DEVICE * dptr)
{
return SCPE_OK;
}
int
dasd_format(UNIT * uptr) {
struct dasd_header hdr;
struct dasd_t *data;
int type = GET_TYPE(uptr->flags);
int tsize;
int cyl;
int hd;
int pos;
if (!get_yn("Initialize dasd? [Y]", TRUE)) {
return 1;
}
memset(&hdr, 0, sizeof(struct dasd_header));
strncpy(&hdr.devid[0], "CKD_P370", 8);
hdr.heads = disk_type[type].heads;
hdr.tracksize = (disk_type[type].bpt | 0x1ff) + 1;
hdr.devtype = disk_type[type].dev_type;
sim_fseek(uptr->fileref, 0, SEEK_SET);
sim_fwrite(&hdr, 1, sizeof(struct dasd_header), uptr->fileref);
if ((data = (struct dasd_t *)calloc(1, sizeof(struct dasd_t))) == 0)
return 1;
uptr->up7 = (void *)data;
tsize = hdr.tracksize * hdr.heads;
data->tsize = hdr.tracksize;
if ((data->cbuf = (uint8 *)calloc(tsize, sizeof(uint8))) == 0)
return 1;
for (cyl = 0; cyl < disk_type[type].cyl; cyl++) {
pos = 0;
for (hd = 0; hd < disk_type[type].heads; hd++) {
data->cbuf[pos++] = 0;
data->cbuf[pos++] = (cyl >> 8);
data->cbuf[pos++] = (cyl & 0xff);
data->cbuf[pos++] = (hd >> 8);
data->cbuf[pos++] = (hd & 0xff);
data->cbuf[pos++] = 0xff;
data->cbuf[pos++] = 0xff;
data->cbuf[pos++] = 0xff;
data->cbuf[pos++] = 0xff;
pos += data->tsize - 9;
}
sim_fwrite(data->cbuf, 1, tsize, uptr->fileref);
if ((cyl % 10) == 0)
fputc('.', stderr);
}
sim_fseek(uptr->fileref, sizeof(struct dasd_header), SEEK_SET);
sim_fread(data->cbuf, 1, tsize, uptr->fileref);
data->cpos = sizeof(struct dasd_header);
data->ccyl = 0;
data->ccyl = 0;
data->cyl = 2000;
data->state = DK_POS_SEEK;
sim_activate(uptr, 100);
fputc('\n', stderr);
fputc('\r', stderr);
return 0;
}
t_stat
dasd_attach(UNIT * uptr, CONST char *file)
{
uint16 addr = GET_UADDR(uptr->u3);
t_stat r;
int i;
struct dasd_header hdr;
struct dasd_t *data;
int tsize;
if ((r = attach_unit(uptr, file)) != SCPE_OK)
return r;
if (sim_fread(&hdr, 1, sizeof(struct dasd_header), uptr->fileref) !=
sizeof(struct dasd_header) || strncmp(&hdr.devid[0], "CKD_P370", 8) != 0) {
if (dasd_format(uptr)) {
detach_unit(uptr);
return SCPE_FMT;
}
return SCPE_OK;
}
fprintf(stderr, "%8s %d %d %02x %d\n\r", hdr.devid, hdr.heads, hdr.tracksize,
hdr.devtype, hdr.highcyl);
for (i = 0; disk_type[i].name != 0; i++) {
tsize = (disk_type[i].bpt | 0x1ff) + 1;
if (hdr.devtype == disk_type[i].dev_type && hdr.tracksize == tsize &&
hdr.heads == disk_type[i].heads) {
if (GET_TYPE(uptr->flags) != i) {
/* Ask if we should change */
fprintf(stderr, "Wrong type %s\n\r", disk_type[i].name);
if (!get_yn("Update dasd type? [N]", FALSE)) {
detach_unit(uptr);
return SCPE_FMT;
}
uptr->flags &= ~UNIT_TYPE;
uptr->flags |= SET_TYPE(i);
uptr->capac = disk_type[i].bpt * disk_type[i].heads * disk_type[i].cyl;
}
break;
}
}
if (disk_type[i].name == 0) {
detach_unit(uptr);
return SCPE_FMT;
}
if ((data = (struct dasd_t *)calloc(1, sizeof(struct dasd_t))) == 0)
return 0;
uptr->up7 = (void *)data;
tsize = hdr.tracksize * hdr.heads;
data->tsize = hdr.tracksize;
if ((data->cbuf = (uint8 *)calloc(tsize, sizeof(uint8))) == 0) {
detach_unit(uptr);
return SCPE_ARG;
}
sim_fseek(uptr->fileref, sizeof(struct dasd_header), SEEK_SET);
sim_fread(data->cbuf, 1, tsize * hdr.heads, uptr->fileref);
data->cpos = sizeof(struct dasd_header);
data->ccyl = 0;
data->cyl = 2000;
data->state = DK_POS_SEEK;
sim_activate(uptr, 100);
return SCPE_OK;
}
t_stat
dasd_detach(UNIT * uptr)
{
struct dasd_t *data = (struct dasd_t *)uptr->up7;
int type = GET_TYPE(uptr->flags);
if (uptr->u3 & DK_CYL_DIRTY) {
sim_fseek(uptr->fileref, data->cpos, SEEK_SET);
sim_fwrite(data->cbuf, 1, data->tsize * disk_type[type].heads, uptr->fileref);
uptr->u3 &= ~DK_CYL_DIRTY;
}
if (data != 0) {
free(data->cbuf);
free(data);
}
uptr->up7 = 0;
uptr->u3 = 0;
return detach_unit(uptr);
}
t_stat
dasd_boot(int32 unit_num, DEVICE * dptr)
{
UNIT *uptr = &dptr->units[unit_num];
t_stat r;
if ((uptr->flags & UNIT_ATT) == 0)
return SCPE_UNATT; /* attached? */
return chan_boot(GET_UADDR(uptr->u3), dptr);
}
/* Disk option setting commands */
t_stat
dasd_set_type(UNIT * uptr, int32 val, CONST char *cptr, void *desc)
{
int i, u;
if (cptr == NULL)
return SCPE_ARG;
if (uptr == NULL)
return SCPE_IERR;
if (uptr->flags & UNIT_ATT)
return SCPE_ALATT;
for (i = 0; disk_type[i].name != 0; i++) {
if (strcmp(disk_type[i].name, cptr) == 0) {
uptr->flags &= ~UNIT_TYPE;
uptr->flags |= SET_TYPE(i);
uptr->capac = disk_type[i].bpt * disk_type[i].heads * disk_type[i].cyl;
return SCPE_OK;
}
}
return SCPE_ARG;
}
t_stat
dasd_get_type(FILE * st, UNIT * uptr, int32 v, CONST void *desc)
{
if (uptr == NULL)
return SCPE_IERR;
fputs("TYPE=", st);
fputs(disk_type[GET_TYPE(uptr->flags)].name, st);
return SCPE_OK;
}
t_stat dasd_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag,
const char *cptr)
{
int i;
fprintf (st, "IBM 2840 Disk File Controller\n\n");
fprintf (st, "Use:\n\n");
fprintf (st, " sim> SET %sn TYPE=type\n", dptr->name);
fprintf (st, "Type can be: ");
for (i = 0; disk_type[i].name != 0; i++) {
fprintf(st, "%s", disk_type[i].name);
if (disk_type[i+1].name != 0)
fprintf(st, ", ");
}
fprintf (st, ".\nEach drive has the following storage capacity:\n\n");
for (i = 0; disk_type[i].name != 0; i++) {
int32 size = disk_type[i].bpt * disk_type[i].heads * disk_type[i].cyl;
char sm = 'K';
size /= 1024;
size = (10 * size) / 1024;
fprintf(st, " %-8s %4d.%1dMB\n", disk_type[i].name, size/10, size%10);
}
fprint_set_help (st, dptr);
fprint_show_help (st, dptr);
return SCPE_OK;
}
const char *dasd_description (DEVICE *dptr)
{
return "IBM 2840 disk file controller";
}
#endif
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