README updates in prep for release
This commit is contained in:
Jeff
Jeff Parsons
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9 changed files with 165 additions and 95 deletions
47
_posts/2016-11-07-vote-for-the-pdp-11.md
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_posts/2016-11-07-vote-for-the-pdp-11.md
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---
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layout: post
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title: Vote For The PDP-11!
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date: 2016-11-07 23:00:00
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permalink: /blog/2016/11/07/
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machines:
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- id: test1170
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type: pdp11
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debugger: true
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config: /devices/pdp11/machine/1170/panel/debugger/machine.xml
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---
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[PDPjs](/devices/pdp11/machine/) support continues to improve:
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- Functional [Front Panels](/devices/pdp11/panel/1170/#front-panel-basics) (see the demo below)
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- ROMs such as DEC's [M9312 ROMs](/devices/pdp11/rom/M9312/) can now be installed
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- Support for DEC's [RL11 Disk Controller](/devices/pdp11/rl11/) has now been implemented
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To test RL11 support below, start the machine (click "Run"), then select the "XXDP Diagnostics" disk from the
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"Disk Drive Controls", click "Load", and wait for the message:
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Mounted disk "XXDP Diagnostics" in drive RL0
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to appear. Then check the output window and make sure the following prompt has been displayed:
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PDP-11 MONITOR V1.0
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BOOT>
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At the prompt, type "BOOT RL0". The following text should appear:
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CHMDLD0 XXDP+ DL MONITOR
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BOOTED VIA UNIT 0
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28K UNIBUS SYSTEM
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ENTER DATE (DD-MMM-YY):
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RESTART ADDR: 152010
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THIS IS XXDP+. TYPE "H" OR "H/L" FOR HELP.
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.
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{% include machine.html id="test1170" %}
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*[@jeffpar](http://twitter.com/jeffpar)*
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*Nov 7, 2016*
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@ -19,6 +19,7 @@ PCjs also includes a small collection of disk images in the [Disk Libraries](/di
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* [IBM PC](/disks/pcx86/)
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* [Challenger 1P](/disks/c1p/)
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* [DEC](/disks/dec/)
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---
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@ -10,85 +10,3 @@ machines:
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{% include machine.html id="test1170" %}
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This machine is also available with our built-in [Debugger](debugger/).
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Front Panel Basics
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------------------
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From the [PDP-11/70 Handbook (1979)](http://archive.pcjs.org/pubs/dec/pdp11/1170/PDP1170_Handbook_1979.pdf), Chapter 10,
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p. 325:
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> ### CONSOLE OPERATION
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> The PDP-11/70 console allows direct control of the computer system. It contains a power switch for the CPU,
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which is also usually used as the Master Switch for the system. The console is used for starting, stopping, resetting,
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and debugging. Lights and switches provide the facilities for monitoring operation, system control, and maintenance.
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Debugging and detailed tracing of operations can be accomplished by having the computer execute single instructions or
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single cycles. Contents of all locations can be examined, and data can be entered manually from the console switches.
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The PDPjs Front Panel replicates most (but not all) the features of a real PDP-11/70 Console. The switches, which
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PDPjs displays as green to make them stand out from the rest of the traditional pink-and-magenta controls, are summarized
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below.
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### 0..21
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Switches 0 to 21 control bits 0 to 21 of the SWITCH register. The UP position represents a 1, and the DOWN position
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represents a 0. Once all the bits have been set, you can choose to load the contents of the SWITCH register into the
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ADDRESS register (as displayed by the top row of LEDs), or directly into the memory location referenced by the ADDRESS
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register (where it will become the DATA displayed by the second row of LEDs).
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The SWITCH, ADDRESS, and DATA (aka DISPLAY) registers are all internal to the Front Panel hardware, and should not be
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confused with CPU registers.
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### TEST
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This is a momentary switch that is normally in the DOWN position. When held in the UP position, it turns on all LEDs.
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This "lamp test" was more important in the days when the lights were produced by bulbs with filaments that could burn out,
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and if you didn't realize that a particular light was "burned out", you could mistake it for a zero.
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While the TEST switch is more "cute" than useful on a virtual Front Panel, we have added one "innovation" to the switch:
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pressing it also returns all the SWITCH register switches (0-21) to their DOWN position.
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### LOAD [ADRS]
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This is a momentary switch that is normally in the UP position. When pressed DOWN, it copies the SWITCH register to the
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ADDRESS register.
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### EXAM
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This is a momentary switch that is normally in the UP position. When pressed DOWN, it reads the memory location referenced
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by the ADDRESS register and displays it in the DATA register. If pressed repeatedly, each repetition also automatically
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adds 2 to the ADDRESS register, making it easier to examine a series of words. Note that if the CPU registers are being
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examined (starting at address 177700), the ADDRESS register will advance by 1 instead of 2.
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Another "innovation" unique to PDPjs: if the STEP switch is toggled from the UP to the DOWN position, repeated EXAM or DEP
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operations will decrease the ADDRESS register instead of increasing it.
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### DEP
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This is a momentary switch that is normally in the DOWN position. When pressed UP, it writes the contents of the SWITCH
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register to the memory location referenced by the ADDRESS register, and displays the result in the DATA register. Like the
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EXAM switch, if DEP is pressed repeatedly, each repetition also automatically adds 2 to the ADDRESS register, making it easier
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to deposit the same value to a series of words.
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### CONT
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This is a momentary switch that is normally in the UP position. When pressed DOWN, it will start the CPU if it's currently
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halted. If the CPU is already running, CONT has no effect. Also, if the ENABLE/HALT switch is in the DOWN (HALT) position,
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then the CPU will continue for only ONE instruction and then stop again.
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### ENABLE/HALT
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This switch is a toggle that is normally in the UP (ENABLE) position. If it pressed DOWN while the CPU is running, the CPU will
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stop. Once the CPU is stopped, this switch has no effect, other than determining what CONT will do when pressed.
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### STEP
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On a real PDP-11, this would select between cycle-stepping vs. instruction-stepping. Since PDPjs doesn't support cycle-stepping,
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this switch has no effect (except as described above when the EXAM or DEP switches are pressed repeatedly).
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### START
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The START switch is similar to CONT, but it also performs the equivalent a RESET instruction before starting the CPU, so
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unless you're starting execution at the beginning of a program, using START instead of CONT to continue execution is probably
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not a good idea. Also, if the ENABLE/HALT switch is in the DOWN (HALT) position, START will still reset the machine but not
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execute anything.
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@ -19,7 +19,7 @@ Toggle-Ins
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As DEC notes in the [PDP-11/70 Maintenance Service Guide](http://archive.pcjs.org/pubs/dec/pdp11/1170/PDP1170_Maintenance_Service_Guide_Apr88.pdf),
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Chapter 4: "There are several useful toggle-ins that are probably not very well known." Excerpts are provided below. If you're
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not sure how to "toggle in" code using a Front Panel, check out [Front Panel Basics](/devices/pdp11/machine/1170/panel/#front-panel-basics).
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not sure how to "toggle in" code using a Front Panel, check out [Front Panel Basics](/devices/pdp11/panel/1170/#front-panel-basics).
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However, since the above machine also includes the PDPjs Debugger, you'll find that it's much easier to use the Debugger commands
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described below to load and execute these "toggle-ins".
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@ -7,4 +7,90 @@ permalink: /devices/pdp11/panel/1170/
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PDP-11/70 Control Panels
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------------------------
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The following Control Panel configurations are available:
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* [PDP-11/70 Front Panel](front.xml) (with [Debugger](debugger/front.xml))
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Use this [PDP-11/70](/devices/pdp11/machine/1170/panel/debugger/) to see the [PDP-11/70 Front Panel](debugger/front.xml) in action.
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Front Panel Basics
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------------------
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From the [PDP-11/70 Handbook (1979)](http://archive.pcjs.org/pubs/dec/pdp11/1170/PDP1170_Handbook_1979.pdf), Chapter 10,
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p. 325:
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> ### CONSOLE OPERATION
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> The PDP-11/70 console allows direct control of the computer system. It contains a power switch for the CPU,
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which is also usually used as the Master Switch for the system. The console is used for starting, stopping, resetting,
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and debugging. Lights and switches provide the facilities for monitoring operation, system control, and maintenance.
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Debugging and detailed tracing of operations can be accomplished by having the computer execute single instructions or
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single cycles. Contents of all locations can be examined, and data can be entered manually from the console switches.
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The PDPjs Front Panel replicates most (but not all) the features of a real PDP-11/70 Console. The switches, which
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PDPjs displays as green to make them stand out from the rest of the traditional pink-and-magenta controls, are summarized
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below.
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### 0..21
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Switches 0 to 21 control bits 0 to 21 of the SWITCH register. The UP position represents a 1, and the DOWN position
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represents a 0. Once all the bits have been set, you can choose to load the contents of the SWITCH register into the
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ADDRESS register (as displayed by the top row of LEDs), or directly into the memory location referenced by the ADDRESS
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register (where it will become the DATA displayed by the second row of LEDs).
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The SWITCH, ADDRESS, and DATA (aka DISPLAY) registers are all internal to the Front Panel hardware, and should not be
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confused with CPU registers.
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### TEST
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This is a momentary switch that is normally in the DOWN position. When held in the UP position, it turns on all LEDs.
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This "lamp test" was more important in the days when the lights were produced by bulbs with filaments that could burn out,
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and if you didn't realize that a particular light was "burned out", you could mistake it for a zero.
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While the TEST switch is more "cute" than useful on a virtual Front Panel, we have added one "innovation" to the switch:
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pressing it also returns all the SWITCH register switches (0-21) to their DOWN position.
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### LOAD [ADRS]
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This is a momentary switch that is normally in the UP position. When pressed DOWN, it copies the SWITCH register to the
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ADDRESS register.
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### EXAM
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This is a momentary switch that is normally in the UP position. When pressed DOWN, it reads the memory location referenced
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by the ADDRESS register and displays it in the DATA register. If pressed repeatedly, each repetition also automatically
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adds 2 to the ADDRESS register, making it easier to examine a series of words. Note that if the CPU registers are being
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examined (starting at address 177700), the ADDRESS register will advance by 1 instead of 2.
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Another "innovation" unique to PDPjs: if the STEP switch is toggled from the UP to the DOWN position, repeated EXAM or DEP
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operations will decrease the ADDRESS register instead of increasing it.
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### DEP
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This is a momentary switch that is normally in the DOWN position. When pressed UP, it writes the contents of the SWITCH
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register to the memory location referenced by the ADDRESS register, and displays the result in the DATA register. Like the
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EXAM switch, if DEP is pressed repeatedly, each repetition also automatically adds 2 to the ADDRESS register, making it easier
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to deposit the same value to a series of words.
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### CONT
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This is a momentary switch that is normally in the UP position. When pressed DOWN, it will start the CPU if it's currently
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halted. If the CPU is already running, CONT has no effect. Also, if the ENABLE/HALT switch is in the DOWN (HALT) position,
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then the CPU will continue for only ONE instruction and then stop again.
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### ENABLE/HALT
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This switch is a toggle that is normally in the UP (ENABLE) position. If it pressed DOWN while the CPU is running, the CPU will
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stop. Once the CPU is stopped, this switch has no effect, other than determining what CONT will do when pressed.
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### STEP
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On a real PDP-11, this would select between cycle-stepping vs. instruction-stepping. Since PDPjs doesn't support cycle-stepping,
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this switch has no effect (except as described above when the EXAM or DEP switches are pressed repeatedly).
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### START
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The START switch is similar to CONT, but it also performs the equivalent a RESET instruction before starting the CPU, so
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unless you're starting execution at the beginning of a program, using START instead of CONT to continue execution is probably
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not a good idea. Also, if the ENABLE/HALT switch is in the DOWN (HALT) position, START will still reset the machine but not
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execute anything.
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@ -12,7 +12,7 @@ Machines containing the [RL11 Component](/modules/pdp11/lib/pc11.js) include:
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- [PDP-11/70 Boot Monitor](/devices/pdp11/machine/1170/monitor/) (with [Debugger](/devices/pdp11/machine/1170/monitor/debugger/))
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- [PDP-11/70 with Front Panel](/devices/pdp11/machine/1170/panel/) (with [Debugger](/devices/pdp11/machine/1170/panel/debugger/))
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PCjs has archived a selection of [RL02K Disk Images](/disks/dec/rl02k/) for use by those machines, most of which are
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PCjs has archived a selection of [RL02K Disk Images](/disks/dec/rl02k/) for use by those machines, which are
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listed in the following RL11 Device XML file:
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- [Default](/devices/pdp11/rl11/default.xml)
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@ -25,18 +25,15 @@ Device XML files not only configure a device, but also list all the resource the
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used to control the device, such as choosing which disks should be "auto-mounted" by the RL11 device. For example:
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<?xml version="1.0" encoding="UTF-8"?>
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<device id="pc11" type="pc11" baudReceive="9600" autoMount='{path:"/apps/pdp11/tapes/absloader/DEC-11-L2PC-PO.json"}' pos="left" width="35%" padLeft="8px" padBottom="8px">
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<name>Paper Tape Controls</name>
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<device id="rl11" type="rl11" autoMount='{RL3:{path:"http://archive.pcjs.org/disks/dec/rl02k/RL02K-XXDP.json"}}' pos="left" width="35%" padLeft="8px" padBottom="8px">
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<name>Disk Drive Controls</name>
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<control type="container">
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<control type="list" binding="listTapes">
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<tape id="tape00" name="Bootstrap Loader (16Kb)" path="/apps/pdp11/boot/bootstrap/BOOTSTRAP-16KB.json"/>
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<tape id="tape01" name="Absolute Loader" path="/apps/pdp11/tapes/absloader/DEC-11-L2PC-PO.json"/>
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<tape id="tape02" name="BASIC (Single User)" path="/apps/pdp11/tapes/basic/DEC-11-AJPB-PB.json"/>
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<control type="list" binding="listDrives"/>
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<control type="list" binding="listDisks">
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<disk id="rl3" name="XXDP Diagnostics" path="http://archive.pcjs.org/disks/dec/rl02k/RL02K-XXDP.json"/>
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</control>
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<control type="button" binding="attachTape">Attach</control>
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<control type="button" binding="loadTape">Load</control>
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<control type="description" binding="descTape" padRight="8px"/>
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<control type="file" binding="mountTape"/>
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<control type="progress" binding="readProgress" pos="default" width="250px" padTop="8px">Tape Progress</control>
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<control type="button" binding="loadDrive">Load</control>
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<control type="description" binding="descDisk" padRight="8px"/>
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<control type="file" binding="mountDisk"/>
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</control>
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</device>
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@ -11,6 +11,7 @@ Browse these PCjs Disk Libraries:
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* [IBM PC](pcx86/)
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* [Challenger 1P](c1p/)
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* [DEC](dec/)
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Additional selected software is available in the PCjs [Software Archives](/apps/).
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10
disks/dec/README.md
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10
disks/dec/README.md
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@ -0,0 +1,10 @@
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---
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layout: page
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title: DEC Disk Images
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permalink: /disks/dec/
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---
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DEC Disk Images
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---------------
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* [RL02K](rl02k/)
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10
disks/dec/rl02k/README.md
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10
disks/dec/rl02k/README.md
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---
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layout: page
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title: DEC RL02K Disk Images
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permalink: /disks/dec/rl02k/
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---
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DEC RL02K Disk Images
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---------------------
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* [XXDP Diagnostics](http://archive.pcjs.org/disks/dec/rl02k/RL02K-XXDP.json)
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