Commodore 1581 - Page 116

TABLE 2:
name
OKDV
MISHD DV ER
NOADAM DV ER
MISDBLK DV ER
CRCDBLK DV ER
FMTJDV_ER
VERERR_DV_ER
WRTPR DV ER
CRCHD_DV_ER
DSKCHGJDV_W
DSKNTLOG_DV_EF
CONTROLLER ER
SYNTAX DV-ER
NODSKPRSDVER
code
$0x
$02
$03
$04
$05
$06
$07
$08
$09
$0A
$0B
l$0C
$0D
$0E
$0F
Controller JOB Return Codes
description
No error.
Can't find header block.
No address mark detected.
Data block not present.
CRC error encountered in data block.
Format error.
Verify error.
Attempt to write to a write protected disk.
CRC error encountered in header block.
Reserved.
Disk was changed / disk ID mismatch.
Disk format not logical.
Floppy disk controller IC error.
Syntax error. Invalid job number.
No disk is present in the drive.
Here is an example BASIC program which will display the data on
any sector of the 1581 disk. It puts a READ SECTOR job directly into
the Controller Job Queue using MEMORY-WRITE, and then reads the
sector data directly from the Job Queue Buffer using MEMORY-READ.
0010 OPEN 1,8,15 : REM OPEN COMMAND CHANNEL TO 1581
0020 OPEN 2,8,2,"#" : REM OPEN BUFFER #0 OF THE 1581 (AT $0300
OF 1581)
0030 INPUT "TRACK, SECTOR TO READ";T,S
0040 REM WRITE TRACK, SECTOR PARAMETERS TO HDRS IN 1581 RAM
(AT $000B)
0050 PRINT#1,"M-W" + CHR$(11) + CHR$(0) + CHR$(2) + CHR$(T)
+ CHR$(S)
0060 REM PUT THE READ SECTOR ($80) COMMAND INTO THE JOB
QUEUE
0070 PRINT#1, "M-W" + CHR$#(2) + CHR$(0) + CHR$(l) + CHR$(128)
0080 REM READ BACK THE JOB QUEUE WHERE THE COMMAND WAS
JUST WRITTEN,
0090 REM WAITING FOR THE STATUS TO BE WRITTEN INTO IT.
0100 PRINT#1,"M-R" + CHR$(2) + CHR$(0) + CHR$(l)
0110 GET#1, A$ : IF ASC(A$) > 127 THEN 100
0120 PRINT "STATUS RETURNED = ";ASC(A$)
0130 REM READ THE TRANSLATED TRACK, SECTOR VALUES FROM
HDRS2
0130 PRINT#1, "M-R" + CHR$(188) + CHR$(01) + CHR$(02)
0140 GET#1,A$ : PT=ASC(A$)
0150 GET#1,A$ : PS=ASC(A$)
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