CYGN-B

[laserist]

It's important to remember it was a long time ago. The DOG programing was done real close to the bare metal. The first computer at Laser Images was a six board wire wrapped masters thesis project. Having some junk in the unaddressed space wasn't because they put it there - they just didn't take it out.

The first digital image Laser Images did (Laserium) was "digitized" on graph paper and manually converted to hex to write the file to burn the EPROM.

[lasermaster1977]

It's important to remember it was a long time ago. The DOG programing was done real close to the bare metal. The first computer at Laser Images was a six board wire wrapped masters thesis project. Having some junk in the unaddressed space wasn't because they put it there - they just didn't take it out.

The first digital image Laser Images did (Laserium) was "digitized" on graph paper and manually converted to hex to write the file to burn the EPROM.

Yes sir, I just re-read my John Bell Engineering, Inc 2716 EPROM Programmer manual (to fact check myself and my old recollections) which states that any memory location within the 2K data range to be written that is not to be overwritten should be filled with FF. So it was possible to only write to certain places when re-coding the 2716. This is the only EPROM programmer that I'm familiar with so other EPROM programmers probably did the same thing.

I may have had a 110VAC UV light bulb although I don't remember its been so long ago. I seem to recall using a standard 60W light bulb goose neck lamp placed close to the EPROM window for about 20-30 minutes (or maybe less).

The first 4 or 5 digital images I did were also drawn points on a 255 x 255 grid paper and converted to hex and manually typed into Apple II's memory, then save to floppy.

[Greg]

Here's a photo of the drum kit graphic recovered by lasermaster1977, shown in laser. Also shown are front and back photos of an interesting looking unidentified wire wrap board that came with the shipment that was picked up in Buffalo a few years ago.

[laserist]

That board was just included for the parts. It had four fairly fast 12 bit adc & dac chips. It plugged into a IBM PC, and I used it to characterize the analog color computer of a Hell 340 rotary drum scanner recorder. I built it about 7 years after my time with Laser Images.

[Greg]

The meeting with the program director at the city's second oldest operating cinema has occurred. I was told the owners are interested and a date might be in January.

The plan is to have a table in the center back row and block off center parts of about four rows. The floor is on a shallow descending incline.

The table has my four ilda projectors, the briefcase sized juke system with the belas and the multabela harness, and the ubiquitous laptop.

To be determined is getting line level audio from the juke to their booth. If audio is through a cable from the audio source strung straight up high in the air and over into the booth, I expect "what AC power circuit I'm on" is something that should be understood ahead of time...

[laserist]

If the juke has unbalanced outputs - get unbalanced to balanced transformers...

[lasermaster1977]

Been busy with a host of other projects but finding time to work on some of the LII ROM images I recovered.

Greg posted the raw DRUMS image a few posts back in this thread, but when taking a closer look at it by walking point-by-point through the image I found about 50 redundant points that caused an unnecessary jump to one of the drum head ovals already drawn and a repeat of points already drawn in one of the snare drum stands. I removed these unnecessary points, converted the images to 8-bit, whole number integer values for display with my Apple IIe AppleDAC driver and image editing software and took the following photos.

I see from these photos I took just now that my laser projector needs the galvo and beam exit glass cleaned. I've not used it for probably a year or so.

DRUMS - I added some quick color blanking and a few anchor points in DRUMS and PFHEAD1


BOTTLE


WORLD (now this was not in any LII ROMS but was a hand printed list of hex values on the last page of the DOGN schematic and 6504 op code listing)


PFHEAD1 (Greg believes it went with PINK FLOYD's Brain Damage)


PFHEAD2


More added 10/27/24 below.

RAINBOWCADENZA


Here's a few more tidbits of hand held video shooting I did today of the PFHEADs and RAINBOWCADENZA

https://youtu.be/54s6xhY5goU

[Greg]

I totally expected there to be the Police LED faces, the Starship logo, South America too, and the car from Cars which I remember as being similar to #17 DYNADIG logo. At least the face from Brain Damage makes sense. The restored Brain Damage has a really good hardly at all corny XYI animation of the face and the blade that came from ADAT.

Your work on the graphics looks great. Great clean up on the drums. I like the video too. Your system has less noise and looks more authentic then mine, in spite of all the legendary content. Remind us again please, if you would, a brief story on the DACs and galvos used here?

I have been working with two 4 track shows I haven't previously given much attention to. The shows being John Williams and Laserblast. Ron, if your archive by chance at some point turns up PIN documents for either of these shows, then here's someone making an inquiry at the Library desk.

The Danube board never got built, though I have the schematic and all the rare and common parts ready to go. I've been using analog oscillators and AM to produce the danube circles and eights when called for, which is pretty good. But there are a couple of danube control signals that are present in the 351 data and are reproduced by the multabela. It is the hardware these signals control that remains unexplored.

Pursuant to this, I have been noting somewhat rare long passages of danube circles and eights in various shows, so that there will be interesting historical data to test a rebuild of the hardware on. And I found something quite awesome.

The mid part of the Cantina song has this weird aggressive bass that doesn't to me seem nearly as pronounced in any other recording of the music I've heard. Maybe it's some custom laser mix. And there appears a big phat blue danube eight astoundingly tightly visually mimicking the bass, so I bet there is some telltale rotation rate and cue data worth looking at. I wonder what exactly the cue bit does.

[ronhip]

Greg,

You are really stretching the old neurons. You are asking me to remember stuff from 40 years ago!

However, from your dynadig diagram, I do remember #9 to 16 were from "Blinded by Science" in LaserWave - 1983, and the bunny (#29 to 32) might be from the Beatles show - Good night. The flying saucer (#18 to 20) may have been from Planet Claire ( LaserRock Platinum - 1984). The whip and bugle (#21 to 24 and #39) from Laser Holiday 1992. I believe the random shapes (#33 to 47) may have been for the Police (1987) The spoon (#48) used to "tap" the bottle at the beginning of "YYZ" of 1984's "Rush - Grace Under Pressure".

I'll try to attach the PIN from John Williams below, but I don't have one for Laser Blast as we never performed that show in San Francisco. It was too "hard rock" for the planetarium director at the time and he wouldn't allow it.

Ron

I totally expected there to be the Police LED faces, the Starship logo, South America too, and the car from Cars which I remember as being similar to #17 DYNADIG logo. At least the face from Brain Damage makes sense. The restored Brain Damage has a really good hardly at all corny XYI animation of the face and the blade that came from ADAT.

Your work on the graphics looks great. Great clean up on the drums. I like the video too. Your system has less noise and looks more authentic then mine, in spite of all the legendary content. Remind us again please, if you would, a brief story on the DACs and galvos used here?

I have been working with two 4 track shows I haven't previously given much attention to. The shows being John Williams and Laserblast. Ron, if your archive by chance at some point turns up PIN documents for either of these shows, then here's someone making an inquiry at the Library desk.

The Danube board never got built, though I have the schematic and all the rare and common parts ready to go. I've been using analog oscillators and AM to produce the danube circles and eights when called for, which is pretty good. But there are a couple of danube control signals that are present in the 351 data and are reproduced by the multabela. It is the hardware these signals control that remains unexplored.

Pursuant to this, I have been noting somewhat rare long passages of danube circles and eights in various shows, so that there will be interesting historical data to test a rebuild of the hardware on. And I found something quite awesome.

The mid part of the Cantina song has this weird aggressive bass that doesn't to me seem nearly as pronounced in any other recording of the music I've heard. Maybe it's some custom laser mix. And there appears a big phat blue danube eight astoundingly tightly visually mimicking the bass, so I bet there is some telltale rotation rate and cue data worth looking at. I wonder what exactly the cue bit does.

[Greg]

but I don't have one for Laser Blast as we never performed that show in San Francisco. It was too "hard rock" for the planetarium director at the time and he wouldn't allow it.Ron

I kind of side with the director. Something about that collection of music seems disrespectful in a planetarium.

Ron, it's wonderful you have preserved such significant chunks of knowledge. Thank you for the John Williams PIN. That was the important one. For no good reason, I didn't expect much in the way of exciting choreography for John Williams. Boy was I wrong. Laserium is still showing me how to understand music that I didn't previously understand. Isn't that part of what brought return audiences back in the days?

On the subject of classical music, I might as well ask now about a Crystal Odyssey PIN. The shows mentioned here have voice track switch in / out select as the show plays, and it's exciting to have the PIN to read through to help identify what is supposed to be going on.

The Jaws page in the John Williams PIN contains the attached note defining the walking on the moon man, which is my all time favorite cycloid. This info is actually still a good find, as I can use this to subdue any lingering uncertainties regarding the inter-oscillator modulation signal routing of the CYGN-B, and thus have confidence I'm getting the cycloids correct as described in the PINs.

Following is a transcript of the voice track for part of the Beatles show. Wow performing a live laser show sounds like fun.

(show begins)
Break a leg.
dog is 1 1 1
fixed cycloid position 6 (ADIG)
joystick gain up and the joystick preset at 9:00
fader1 is up
slow fade up on fader4
and fade out on the crescendo


ok down joystick
fixed cycloid position 7 (CYGN_B)
joystick dots
There's a collapsed cycloid written from the digital oscillators.


(next song)
dog is 01
and these are analog cycloids


(next song)
this is analog rotation of a reset digital spiral
of the C analog oscillator at about 3 and a half
slow
a collapsed cycloid on the bottom oscillator of the digitals
frequency all the way up
and play the AM on the digital oscillator
at low frequency
AM will be controlled by the middle oscillator
and the other playable variable will be the symmetry
on the rotating oscillator, the slow analog oscillator.
(first voice) OK go fixed cycloid 1 (circle)
and spiral select 1 with no size on oscillators


(next song)
and is a ? cycle to bring in your AO top
it should be a single bar or something simple
and 1 0 on the offsets
0 1 will get you the two different combinations of danube circles
OK fade scan


(next song)
get ready with your analog cycloid
and bring up your duty cycle with it already matched
...
all of this is completely ? control


(next song)
(other voice)
Ok fixed cycloids switch to 7 (CYGN-B)
make a circle on the digital oscillators
audio mod rotator in 3
fixed cycloid switch can switch to 10 on the really big cues


(next song) daytripper
fade in the green
what the setup for this is ? the audiomod rotator on 2 2
and beating the audio mod against an analog cycloid with symmetry flipped over
also using low end oscillator on C
to beat the image in and out
and ? dog offset to make the image go in and out with the C oscillator
we're able to take it and seep it out so getting a perspective view
by taking the gain up into variant and introducing B also ? perspective view
Just use discretion on imagery to play with add colormod at the low end
on the colormod 1
are 2 in sync
just use your discretion again
play to your hearts content
...
(first voice)
ok ? fader should be down around 4
for a quiet fadeout into yesterday
...


(next song) yesterday
hit 3 on your keypad to get the ADIG image
should rotate by audiomod rotator
6 on fixed cycloid (ADIG)
and axis rotation
just slowly fade in
rotated image
should kind of resemble a tulip a little flat on top
its got joystick on it so damped, slowly moving around
by switching different selects on the keypad you can dissolve from one logo to another
and they'll stay locked up with the rotation from the digital signal
and slowly rotating to dissolve into different stuff
nothing extremely symmetrical is as the road goes
except for maybe zero
um, avoid F for some reason occasionally the dissolve steps
really jerkily and you don't want to look at it
...


(next song)
(other voice)
fixed cycloids position 10
audio mod rotator 3 3
and a pretty 3 oscillator cycloid on the digitals
we've also got joystick rotation
use the damping
...


(next song)
fixed cycloid position 6
spiral select position 1
high speed analog cycloid with one axis collapsed
that's rotated for the green image
play the beam torquer fading in from blue
and the individual size controls
...


(next song)
(first voice)
Ok, ? KQO
and ? colormod on the slow oscillator
to do a nice slow beating of the center
and you sum that in to to get the good old snake
and the little things that become horns
could be KQO also, they could be digital cycloid
and when it tumbles like that it's really good if
sum is on it so theres ? that little stick
...
The horns ? should be horns slow oscillator so ? or three sticks out
by looking at sizes and symmetries and joysticks go nuts on everything ? shape
now you'll have fun


(next song) magical mystery tour
(other voice)
ok spiral select 2...