HP HP 2100 Series, User Manual

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Drive configuration may be displayed with the following commands:
Command Action
SHOW MTC Display the drive’s configuration
SHOW MTC FORMAT
Display the drive’s tape image format
The BOOT command is not supported. The 12559C is disabled by default.
The Data PCA state contains these registers:
Name Size Radix Action
FLG 1 2 Flag flip-flop
FBF 1 2 Flag buffer flip-flop
DBUF [0:65535] 8 8 Tape record buffer
BPTR 17 10 Buffer pointer
BMAX 17 10 Buffer size for writes
The Control PCA state contains these registers:
Name Size Radix Action
FNC 8 8 Current function
STA 9 8 Tape status
BUF 8 8 Command buffer
CTL 1 2 Control flip-flop
FLG 1 2 Flag flip-flop
FBF 1 2 Flag buffer flip-flop
DTF 1 2 Data transfer flip-flop
FSVC 1 2 First service flip-flop
POS 32 10 Tape position
CTIME 24 10 Command delay time
GTIME 24 10 Inter-record gap traversal time
XTIME 24 10 Inter-word transfer time
6.2 13181B Digital Magnetic Tape Unit Interface with Four 7970B Drives,
13183B Digital Magnetic Tape Unit Interface with Four 7970E Drives
The HP 13181B and 13183B Digital Magnetic Tape Unit Interfaces connect from one to four HP 7970B 800-bpi
NRZI and HP 7970E 1600-bpi PE ½-inch magnetic tape drives, respectively, to the HP computer family. Both
interfaces consist of two Printed Circuit Assemblies installed in adjacent I/O slots. The Data PCA is assigned the
higher-priority (lower numbered) select code, and the Control PCA is assigned the lower-priority select code. The
MSD and MSC devices simulate these PCAs.
Attaching a tape image file to a unit simulates mounting a tape reel on a drive:
ATTACH {-R} {-F} MSCn {<format>} <image-filename>
Adding the –R (read-only) switch is equivalent to mounting the tape without a write ring in place. Adding the –F
switch and a format identifier declares the tape image format to be used. Supported formats are SIMH , E11 , TPC ,
and P7B . If the –F switch and a format identifier are not supplied, then SIMH tape image format is used. Note that
erase gaps embedded in the tape image file are supported only in SIMH image format mode.