1da2d9452d
RESTRICTION: The FP15 and XVM features of the PDP-15 are only partially debugged. Do NOT enable these features for normal operations. 1. New Features in 3.1-0 1.1 SCP and libraries - Added simulated Ethernet support for VMS, FreeBSD, Mac OS/X. - Added status return to tmxr_putc_ln. - Added sim_putchar_s to handle possible output stalls. 1.2 All DECtapes - Added "DECtape off reel" error stop. 1.3 All Asynchronous Consoles - Added support for output congestion stall if using a Telnet connection. 1.4 PDP-1 - Added Type 23 parallel drum support. 1.5 PDP-8 - Added instruction history. - Added TSC8-75 option support for ETOS. - Added TD8E DECtape support. 1.6 PDP-18b - Added instruction history. - Changed PDP-9, PDP-15 API default to enabled. 1.7 PDP-11 - Added support for 18b only Qbus devices. - Formalized bus and addressing definitions. - Added control to enable/disable autoconfiguration. - Added stub support for second Unibus Ethernet controller. 1.7 Interdata 32b - Added instruction history. 1.8 Eclipse - Added floating point support. - Added programmable interval timer support. 1.9 H316 - Added DMA/DMC support. - Added fixed head disk support. - Added moving head disk support. - Added magtape support. 1.10 IBM 1130 (Brian Knittel) - Added support for physical card reader, using the Cardread interface (www.ibm1130.org/sim/downloads). - Added support for physical printer (flushes output buffer after each line). 2. Bugs Fixed in 3.1-0 2.1 SCP and libraries - Fixed numerous bugs in Ethernet library. 2.2 All DECtapes - Fixed reverse checksum value in 'read all' mode. - Simplified (and sped up) timing. 2.3 PDP-8 - Fixed bug in RX28 read status (found by Charles Dickman). - Fixed RX28 double density write. 2.4 PDP-18b - Fixed autoincrement bug in PDP-4, PDP-7, PDP-9. 2.5 PDP-11/VAX - Revised RQ MB->LBN conversion for greater accuracy. - Fixed bug in IO configuration (found by David Hittner). - Fixed bug with multiple RQ RAUSER drives. - Fixed bug in second Qbus Ethernet controller interrupts. 2.6 Nova/Eclipse - Fixed bugs in DKP flag clear, map setup, map usage (Charles Owen). - Fixed bug in MT, reset completes despite I/O reset (Charles Owen). - Fixed bug in MT, space operations return word count (Charles Owen). 2.7 IBM 1130 (Brian Knittel) - Fixed bug in setting carry bit in subtract and subtract double. - Fixed timing problem in console printer simulation. 2.8 1620 - Fixed bug in branch digit (found by Dave Babcock). 3. New Features in 3.0 vs prior releases 3.1 SCP and Libraries - Added ASSIGN/DEASSIGN (logical name) commands. - Changed RESTORE to unconditionally detach files. - Added E11 and TPC format support to magtape library. - Fixed bug in SHOW CONNECTIONS. - Added USE_ADDR64 support. 3.2 All magtapes - Magtapes support SIMH format, E11 format, and TPC format (read only). - SET <tape_unit> FORMAT=format sets the specified tape unit's format. - SHOW <tape_unit> FORMAT displays the specified tape unit's format. - Tape format can also be set as part of the ATTACH command, using the -F switch. 3.3 VAX - VAX can be compiled without USE_INT64. - If compiled with USE_INT64 and USE_ADDR64, RQ and TQ controllers support files > 2GB. - VAX ROM has speed control (SET ROM DELAY/NODELAY). 3.4 PDP-1 - Added block loader format support to LOAD. - Changed BOOT PTR to allow loading of all of the first bank of memory. - The LOAD command takes an optional argument specifying the memory field to be loaded. - The PTR BOOT command takes its starting memory field from the TA (address switch) register. 3.5 PDP-18b Family - Added PDP-4 EAE support. - Added PDP-15 FP15 support. - Added PDP-15 XVM support. - Added PDP-15 "re-entrancy ECO". - Added PDP-7, PDP-9, PDP-15 hardware RIM loader support in BOOT PTR. 4. Bugs Fixed in 3.0 vs prior releases 4.1 SCP and Libraries - Fixed end of file problem in dep, idep. - Fixed handling of trailing spaces in dep, idep. 4.2 VAX - Fixed CVTfi bug: integer overflow not set if exponent out of range - Fixed EMODx bugs: o First and second operands reversed o Separated fraction received wrong exponent o Overflow calculation on separated integer incorrect o Fraction not set to zero if exponent out of range - Fixed interval timer and ROM access to pass power-up self-test even on very fast host processors (fixes from Mark Pizzolato). - Fixed bug in user disk size (found by Chaskiel M Grundman). 4.3 1401 - Fixed mnemonic, instruction lengths, and reverse scan length check bug for MCS. - Fixed MCE bug, BS off by 1 if zero suppress. - Fixed chaining bug, D lost if return to SCP. - Fixed H branch, branch occurs after continue. - Added check for invalid 8 character MCW, LCA. - Fixed magtape load-mode end of record response. - Revised fetch to model hardware more closely. - Fixed tape read end-of-record handling based on real 1401. - Added diagnostic read (space forward). 4.4 Nova - Fixed DSK variable size interaction with restore. - Fixed bug in DSK set size routine. 4.5 PDP-1 - Fixed DT variable size interaction with restore. - Updated CPU, line printer, standard devices to detect indefinite I/O wait. - Fixed incorrect logical, missing activate, break in drum simulator. - Fixed bugs in instruction decoding, overprinting for line printer. - Fixed system hang if continue after PTR error. - Fixed PTR to start/stop on successive rpa instructions. 4.6 PDP-11 - Fixed DT variable size interaction with restore. - Fixed bug in MMR1 update (found by Tim Stark). - Added XQ features and fixed bugs: o Corrected XQ interrupts on IE state transition (code by Tom Evans). o Added XQ interrupt clear on soft reset. o Removed XQ interrupt when setting XL or RL (multiple people). o Added SET/SHOW XQ STATS. o Added SHOW XQ FILTERS. o Added ability to split received packet into multiple buffers. o Added explicit runt and giant packet processing. - Fixed bug in user disk size (found by Chaskiel M Grundman). 4.7 PDP-18B - Fixed DT, RF variable size interaction with restore. - Fixed MT bug in MTTR. - Fixed bug in PDP-4 line printer overprinting. - Fixed bug in PDP-15 memory protect/skip interaction. - Fixed bug in RF set size routine. - Increased PTP TIME for PDP-15 operating systems. - Fixed priorities in PDP-15 API (differs from PDP-9). - Fixed sign handling in PDP-15 EAE unsigned mul/div (differs from PDP-9). - Fixed bug in CAF, clears API subsystem. 4.8 PDP-8 - Fixed DT, DF, RF, RX variable size interaction with restore. - Fixed MT bug in SKTR. - Fixed bug in DF, RF set size routine. 4.9 HP2100 - Fixed bug in DP (13210A controller only), DQ read status. - Fixed bug in DP, DQ seek complete. - Fixed DR drum sizes. - Fixed DR variable capacity interaction with SAVE/RESTORE. 4.10 GRI - Fixed bug in SC queue pointer management. 4.11 PDP-10 - Fixed bug in RP read header. 4.12 Ibm1130 - Fixed bugs found by APL 1130. 4.13 Altairz80 - Fixed bug in real-time clock on Windows host. 4.14 1620 - Fixed bug in immediate index add (found by Michael Short).
596 lines
17 KiB
Text
596 lines
17 KiB
Text
To: Users
|
|
From: Bob Supnik
|
|
Subj: Nova Simulator Usage
|
|
Date: 15-Mar-2003
|
|
|
|
COPYRIGHT NOTICE
|
|
|
|
The following copyright notice applies to both the SIMH source and binary:
|
|
|
|
Original code published in 1993-2003, written by Robert M Supnik
|
|
Copyright (c) 1993-2003, Robert M Supnik
|
|
|
|
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
|
|
ROBERT M SUPNIK 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.
|
|
|
|
Except as contained in this notice, the name of Robert M Supnik shall not
|
|
be used in advertising or otherwise to promote the sale, use or other dealings
|
|
in this Software without prior written authorization from Robert M Supnik.
|
|
|
|
This memorandum documents the Nova simulator.
|
|
|
|
|
|
1. Simulator Files
|
|
|
|
sim/ sim_defs.h
|
|
sim_rev.h
|
|
sim_sock.h
|
|
sim_tape.h
|
|
sim_tmxr.h
|
|
scp.c
|
|
scp_tty.c
|
|
sim_sock.c
|
|
sim_tape.c
|
|
sim_tmxr.c
|
|
|
|
sim/nova/ nova_defs.h
|
|
nova_cpu.c
|
|
nova_clk.c
|
|
nova_dkp.c
|
|
nova_dsk.c
|
|
nova_lp.c
|
|
nova_mta.c
|
|
nova_plt.c
|
|
nova_sys.c
|
|
nova_tt.c
|
|
nova_tt1.c
|
|
|
|
2. Nova Features
|
|
|
|
The Nova simulator is configured as follows:
|
|
|
|
device simulates
|
|
name(s)
|
|
|
|
CPU Nova CPU with 32KW of memory
|
|
- hardware multiply/divide
|
|
PTR,PTP paper tape reader/punch
|
|
TTI,TTO console terminal
|
|
TTI1,TTO1 second terminal
|
|
LPT line printer
|
|
PLT plotter
|
|
CLK real-time clock
|
|
DK head-per-track disk controller
|
|
DP moving head disk controller with four drives
|
|
MT magnetic tape controller with eight drives
|
|
|
|
The Nova simulator implements these unique stop conditions:
|
|
|
|
- reference to undefined I/O device, and STOP_DEV is set
|
|
- more than INDMAX indirect addresses are detected during
|
|
an interrupt
|
|
- more than INDMAX indirect addresses are detected during
|
|
memory reference address decoding
|
|
|
|
The Nova loader supports standard binary format tapes. The DUMP command
|
|
is not implemented.
|
|
|
|
Most devices can be disabled or enabled, by the commands:
|
|
|
|
SET <dev> DISABLED
|
|
SET <dev> ENABLED
|
|
|
|
All devices are enabled by default.
|
|
|
|
2.1 CPU
|
|
|
|
The only CPU options are the presence of the optional instructions
|
|
and the size of main memory.
|
|
|
|
SET CPU MDV enable multiply/divide
|
|
SET CPU NOVA3 enable Nova3 instructions
|
|
SET CPU NOVA4 enable Nova4 instructions
|
|
SET CPU NONE disable all optional instructions
|
|
SET CPU 4K set memory size = 4K
|
|
SET CPU 8K set memory size = 8K
|
|
SET CPU 12K set memory size = 12K
|
|
SET CPU 16K set memory size = 16K
|
|
SET CPU 20K set memory size = 20K
|
|
SET CPU 24K set memory size = 24K
|
|
SET CPU 28K set memory size = 28K
|
|
SET CPU 32K set memory size = 32K
|
|
|
|
(MDV = unsigned multiply/divide instructions)
|
|
(Nova 3 = unsigned multiply/divide, stack, trap instructions)
|
|
(Nova 4 = unsigned and signed multiply/divide, stack, byte, trap instructions)
|
|
|
|
If memory size is being reduced, and the memory being truncated contains
|
|
non-zero data, the simulator asks for confirmation. Data in the truncated
|
|
portion of memory is lost. Initial memory size is 32K.
|
|
|
|
CPU registers include the visible state of the processor as well as the
|
|
control registers for the interrupt system.
|
|
|
|
name size comments
|
|
|
|
PC 15 program counter
|
|
AC0..AC3 16 accumulators 0..3
|
|
C 1 carry
|
|
SR 16 front panel switches
|
|
PI 16 priority interrupt mask
|
|
ION 1 interrupt enable
|
|
ION_DELAY 1 interrupt enable delay for ION
|
|
PWR 1 power fail interrupt
|
|
INT 15 interrupt pending flags
|
|
BUSY 15 device busy flags
|
|
DONE 15 device done flags
|
|
DISABLE 15 device interrupt disable flags
|
|
STOP_DEV 1 stop on undefined IOT
|
|
INDMAX 15 maximum number of nested indirects
|
|
PCQ[0:63] 15 PC prior to last JMP, JMS, or interrupt;
|
|
most recent PC change first
|
|
WRU 8 interrupt character
|
|
|
|
2.2 Programmed I/O Devices
|
|
|
|
2.2.1 Paper Tape Reader (PTR)
|
|
|
|
The paper tape reader (PTR) reads data from a disk file. The POS
|
|
register specifies the number of the next data item to be read. Thus,
|
|
by changing POS, the user can backspace or advance the reader.
|
|
|
|
The paper tape reader implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
POS 32 position in the input file
|
|
TIME 24 time from I/O initiation to interrupt
|
|
STOP_IOE 1 stop on I/O error
|
|
|
|
Error handling is as follows:
|
|
|
|
error STOP_IOE processed as
|
|
|
|
not attached 1 report error and stop
|
|
0 out of tape or paper
|
|
|
|
end of file 1 report error and stop
|
|
0 out of tape or paper
|
|
|
|
OS I/O error x report error and stop
|
|
|
|
2.2.2 Paper Tape Punch (PTP)
|
|
|
|
The paper tape punch (PTP) writes data to a disk file. The POS
|
|
register specifies the number of the next data item to be written.
|
|
Thus, by changing POS, the user can backspace or advance the punch.
|
|
|
|
The paper tape punch implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
POS 32 position in the output file
|
|
TIME 24 time from I/O initiation to interrupt
|
|
STOP_IOE 1 stop on I/O error
|
|
|
|
Error handling is as follows:
|
|
|
|
error STOP_IOE processed as
|
|
|
|
not attached 1 report error and stop
|
|
0 out of tape or paper
|
|
|
|
OS I/O error x report error and stop
|
|
|
|
2.2.3 Terminal Input (TTI)
|
|
|
|
The terminal input polls the console keyboard for input. Terminal
|
|
input options include the ability to set ANSI mode or limited Dasher
|
|
compatibility mode:
|
|
|
|
SET TTI ANSI normal mode
|
|
SET TTI DASHER Dasher mode
|
|
|
|
Setting either TTI or TTO changes both devices. In Dasher mode, carriage
|
|
return is changed to newline on input, and ^X is changed to backspace.
|
|
|
|
The terminal input implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
POS 32 number of characters input
|
|
TIME 24 keyboard polling interval
|
|
|
|
2.2.4 Terminal Output (TTO)
|
|
|
|
The terminal output writes to the simulator console window. Terminal
|
|
output options include the the ability to set ANSI mode or limited
|
|
Dasher compatibility mode:
|
|
|
|
SET TTO ANSI normal mode
|
|
SET TTO DASHER Dasher mode
|
|
|
|
Setting either TTI or TTO changes both devices. In Dasher mode, carriage
|
|
return is changed to newline on input, and ^X is changed to backspace.
|
|
|
|
The terminal output implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
POS 32 number of characters output
|
|
TIME 24 time from I/O initiation to interrupt
|
|
|
|
2.2.5 Line Printer (LPT)
|
|
|
|
The line printer (LPT) writes data to a disk file. The POS register
|
|
specifies the number of the next data item to be written. Thus,
|
|
by changing POS, the user can backspace or advance the printer.
|
|
|
|
The line printer implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
POS 32 position in the output file
|
|
TIME 24 time from I/O initiation to interrupt
|
|
STOP_IOE 1 stop on I/O error
|
|
|
|
Error handling is as follows:
|
|
|
|
error STOP_IOE processed as
|
|
|
|
not attached 1 report error and stop
|
|
0 out of paper
|
|
|
|
OS I/O error x report error and stop
|
|
|
|
2.2.6 Real-Time Clock (CLK)
|
|
|
|
The real-time clock (CLK) line frequency can be adjusted as follows:
|
|
|
|
SET CLK 60HZ set line frequency to 60Hz
|
|
SET CLK 50HZ set line frequency to 50Hz
|
|
|
|
The default is 60Hz.
|
|
|
|
The clock implements these registers:
|
|
|
|
name size comments
|
|
|
|
SELECT 2 selected clock interval
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
TIME0 24 clock frequency, select = 0
|
|
TIME1 24 clock frequency, select = 1
|
|
TIME2 24 clock frequency, select = 2
|
|
TIME3 24 clock frequency, select = 3
|
|
|
|
The real-time clock autocalibrates; the clock interval is adjusted up
|
|
or down so that the clock tracks actual elapsed time.
|
|
|
|
2.2.7 Plotter (PTP)
|
|
|
|
The plotter (PLT) writes data to a disk file. The POS register
|
|
specifies the number of the next data item to be written. Thus,
|
|
by changing POS, the user can backspace or advance the plotter.
|
|
|
|
The plotter implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
POS 32 position in the output file
|
|
TIME 24 time from I/O initiation to interrupt
|
|
STOP_IOE 1 stop on I/O error
|
|
|
|
Error handling is as follows:
|
|
|
|
error STOP_IOE processed as
|
|
|
|
not attached 1 report error and stop
|
|
0 out of tape or paper
|
|
|
|
OS I/O error x report error and stop
|
|
|
|
2.2.8 Second Terminal (TTI1, TTO1)
|
|
|
|
The second terminal consists of two independent devices, TTI1 and TTO1.
|
|
The additional terminal performs input and output through a Telnet session
|
|
connecting into a user-specified port. The ATTACH command specifies the
|
|
port to be used:
|
|
|
|
ATTACH TTI1 <port> set up listening port
|
|
|
|
where port is a decimal number between 1 and 65535 that is not being used
|
|
for other TCP/IP activities.
|
|
|
|
Once TTI1 is attached and the simulator is running, the terminal listens
|
|
for a connection on the specified port. It assumes that the incoming
|
|
connection is a Telnet connection. The connection remain opens until
|
|
disconnected by the Telnet client, or by a DETACH TTI1 command.
|
|
|
|
The second terminal has two options, recognized on both devices, for
|
|
setting limited Dasher-compatibility mode or ANSI mode:
|
|
|
|
SET TTI1 ANSI normal mode
|
|
SET TTI1 DASHER Dasher mode
|
|
SET TTO1 ANSI normal mode
|
|
SET TTO1 DASHER Dasher mode
|
|
|
|
Setting either TTI1 or TTO1 changes both devices. In Dasher mode, carriage
|
|
return is changed to newline on input, and ^X is changed to backspace.
|
|
|
|
The SHOW TTI1 CONNECTIONS command displays the current connection to TTI1.
|
|
The SHOW TTI1 STATISTICS command displays statistics for the current connection.
|
|
The SET TTI1 DISCONNECT{=0} disconnects the current connection.
|
|
|
|
The second terminal input implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
TIME 24 keyboard polling interval
|
|
|
|
The second terminal output implements these registers:
|
|
|
|
name size comments
|
|
|
|
BUF 8 last data item processed
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
TIME 24 time from I/O initiation to interrupt
|
|
|
|
2.3 Fixed Head Disk (DK)
|
|
|
|
Fixed head disk options include the ability to set the number of platters
|
|
to a fixed value between 1 and 8, or to autosize the number of platters
|
|
from the attached file:
|
|
|
|
SET RF 1P one platter (256K)
|
|
SET RF 2P two platters (512K)
|
|
SET RF 3P three platters (768K)
|
|
SET RF 4P four platters (1024K)
|
|
SET RF 5P five platters (1280K)
|
|
SET RF 6P six platters (1536K)
|
|
SET RF 7P seven platters (1792K)
|
|
SET RF 8P eight platters (2048K)
|
|
SET RF AUTOSIZE autosized on attach
|
|
|
|
The default is 1P (minimum size).
|
|
|
|
The fixed head disk controller implements these registers:
|
|
|
|
name size comments
|
|
|
|
STAT 16 status
|
|
DA 16 disk address
|
|
MA 16 memory address
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 device disable flag
|
|
INT 1 interrupt pending flag
|
|
WLK 8 write lock switches
|
|
TIME 24 rotational delay, per sector
|
|
STOP_IOE 1 stop on I/O error
|
|
|
|
The fixed head disk controller supports the BOOT command.
|
|
|
|
Error handling is as follows:
|
|
|
|
error STOP_IOE processed as
|
|
|
|
not attached 1 report error and stop
|
|
0 disk not ready
|
|
|
|
Fixed head disk data files are buffered in memory; therefore, end of file
|
|
and OS I/O errors cannot occur.
|
|
|
|
2.4 Moving Head Disk (DP)
|
|
|
|
Moving head disk options include the ability to make units write enabled or
|
|
write locked, and to select the type of drive:
|
|
|
|
SET DPn LOCKED set unit n write locked
|
|
SET DPn WRITEENABLED set unit n write enabled
|
|
SET DPn FLOPPY set unit n to floppy disk
|
|
SET DPn D31 set unit n to Diablo 31
|
|
SET DPn D44 set unit n to Diablo 44
|
|
SET DPn C111 set unit n to Century 111
|
|
SET DPn C114 set unit n to Century 114
|
|
SET DPn 6225 set unit n to 6225
|
|
SET DPn 6099 set unit n to 6099
|
|
SET DPn 6227 set unit n to 6227
|
|
SET DPn 6070 set unit n to 6070
|
|
SET DPn 6103 set unit n to 6103
|
|
SET DPn 4231 set unit n to 4231
|
|
|
|
Units can also be set ONLINE or OFFLINE. The moving head disk controller
|
|
supports the BOOT command.
|
|
|
|
All drives have 256 16b words per sector. The other disk parameters are:
|
|
|
|
drive cylinders surfaces sectors size (MW) DG models
|
|
|
|
floppy 77 1 8 .158 6038
|
|
D31 203 2 12 1.247 4047, 4237, 4238
|
|
D44 408 4 12 5.014 4234, 6045
|
|
C111 203 10 6 3.118 4048
|
|
C114 203 20 12 12.472 4057, 2314
|
|
6225 245 2 20 2.508
|
|
6099 192 4 32 6.291
|
|
6227 245 6 20 7.526
|
|
6070 408 4 24 10.027
|
|
6103 192 8 32 12.583
|
|
4231 411 19 23 45.979
|
|
|
|
The moving head disk controller implements these registers:
|
|
|
|
name size comments
|
|
|
|
FCCY 16 flags, command, cylinder
|
|
USSC 16 unit, surface, sector, count
|
|
STAT 16 status
|
|
MA 16 memory address
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
DIAG 1 diagnostic mode flag
|
|
MAP 2 map select
|
|
STIME 24 seek time, per cylinder
|
|
RTIME 24 rotational delay
|
|
|
|
Error handling is as follows:
|
|
|
|
error processed as
|
|
|
|
not attached disk not ready
|
|
|
|
end of file assume rest of disk is zero
|
|
|
|
OS I/O error report error and stop
|
|
|
|
2.5 Magnetic Tape (MT)
|
|
|
|
Magnetic tape options include the ability to make units write enabled or
|
|
or write locked.
|
|
|
|
SET MTn LOCKED set unit n write locked
|
|
SET MTn WRITEENABLED set unit n write enabled
|
|
|
|
Units can also be set ONLINE or OFFLINE. The magnetic tape controller
|
|
supports the BOOT command.
|
|
|
|
The magnetic tape controller implements these registers:
|
|
|
|
name size comments
|
|
|
|
CU 16 command, unit
|
|
MA 16 memory address
|
|
WC 16 word count
|
|
STA1 16 status word 1
|
|
STA2 16 status word 2
|
|
EP 1 extended polling mode (not supported)
|
|
BUSY 1 device busy flag
|
|
DONE 1 device done flag
|
|
DISABLE 1 interrupt disable flag
|
|
INT 1 interrupt pending flag
|
|
STOP_IOE 1 stop on I/O error
|
|
CTIME 24 controller delay
|
|
RTIME 24 record delay
|
|
UST[0:7] 32 unit status, units 0-7
|
|
POS[0:7] 31 position, units 0-7
|
|
|
|
Error handling is as follows:
|
|
|
|
error processed as
|
|
|
|
not attached tape not ready
|
|
|
|
end of file bad tape
|
|
|
|
OS I/O error report error and stop
|
|
|
|
2.6 Symbolic Display and Input
|
|
|
|
The Nova simulator implements symbolic display and input. Display is
|
|
controlled by command line switches:
|
|
|
|
-a display as ASCII character
|
|
-c display as two character ASCII string
|
|
-m display instruction mnemonics
|
|
|
|
Input parsing is controlled by the first character typed in or by command
|
|
line switches:
|
|
|
|
' or -a ASCII character
|
|
" or -c two character ASCII string
|
|
alphabetic instruction mnemonic
|
|
numeric octal number
|
|
|
|
Instruction input uses standard Nova assembler syntax. There are three
|
|
instruction classes: memory reference, IOT, and operate.
|
|
|
|
Memory reference instructions have the format
|
|
|
|
memref {ac,}{@}address{,index}
|
|
|
|
LDA and STA require an initial register; ISZ, DSZ, JSR, and JMP do not.
|
|
The syntax for addresses and indices is as follows:
|
|
|
|
syntax mode displacement comments
|
|
|
|
0 <= n < 0400 0 n
|
|
{+/-}n >= 0400 1 {+/-}n - PC must be in range [-200, 177]
|
|
invalid on disk
|
|
.+/-n 1 {+/-}n must be in range [-200, 177]
|
|
{+/-}n,2 2 {+/-}n must be in range [-200, 177]
|
|
{+/-}n,3 3 {+/-}n must be in range [-200, 177]
|
|
|
|
IOT instructions have one of four formats
|
|
|
|
syntax example
|
|
|
|
iot HALT
|
|
iot reg INTA
|
|
iot device SKPDN
|
|
iot reg,device DOAS
|
|
|
|
Devices may be specified as mnemonics or as numbers in the range 0 - 077.
|
|
|
|
Operate instructions have the format
|
|
|
|
opcode{#} reg,reg{,skip}
|
|
|
|
In all Nova instructions, blanks may be substituted for commas as field
|
|
delimiters.
|