PIDP –8/I for sale

[The Oracle]

I have an assembled and tested PiDP-8/I for sale. It includes includes:

Raspberry Pi 3 model B plus

SanDisk Extreme 32 gig memory module (Loaded with the latest Pi 74 bit operating system bookworm & PiDP-8/I software)

Raspberry Pi power supply

Built tested and burnt in for 72 hours PIDP –8/I

Sale Price: $460.00 + shipping and handling

Thanks,

Lynn

[j...@ckrubin.us]

I expect it's that 74-bit operating system that pushes it over the $400 mark. 

[The Oracle]

Thank you, for pointing that out. It is the 64 bit Raspberry Pi OS.

Lynn

[Mike Katz]

If we assume that the Pi 3B is running the 64 bit version then if you add the 64 bits of the Pi OS plus the 12 bits of the the  OS of the PDP-8/I and subtract 2 bits because running the 64-bit version of the PI OS on in 4GB oif RAM isn't really worth 2-bits (2 bits is 25 cents for those of you who are too young to remember the chant 2-bits, 4-bits, 6-bits, a dollar) you get 74 bits.

Pi OS:                                    64 Bits
64 Bit OS in 4GB RAM:       -2 Bits
PDP-8/I OS:                         12 Bits

Total:                                    74 Bits

Actual Costs:

Cost of Kit:                           $225 with shipping ($350 assembled with shipping)
Pi 3B w/4GB:                        $55 (the seller did not say how much memory was on the 3B I'm assuming the maximum 4GB)
PI Power Supply:                   $8 (anywhere from $6 to $10 on the web)
Sandisk 32GB Extreme       $10 (anywhere from $6 to $15 on the web)

Total kit:                              $298
Total Assembled                $423

So the cost new would be between $298 and $423.

Compared to having the kit assembled by Oscar (the creator) the seller spent $298 on the hardware and values their assembly time at $162.

Now if we add in shipping the cost will approach $480 - $500 depending on the sellers markup on the shipping for "handling" costs.

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[Jack Rubin]

Mike,

Thanks for Klarifiying the value offered!

Jack

________________________________________
From: Mike Katz <justme...@gmail.com>
Sent: Saturday, May 11, 2024 7:43 PM
To: Jack Rubin; PiDP-8
Subject: Re: [pidp8] Re: PIDP –8/I for sale

If we assume that the Pi 3B is running the 64 bit version then if you add the 64 bits of the Pi OS plus the 12 bits of the the OS of the PDP-8/I and subtract 2 bits because running the 64-bit version of the PI OS on in 4GB oif RAM isn't really worth 2-bits (2 bits is 25 cents for those of you who are too young to remember the chant 2-bits, 4-bits, 6-bits, a dollar) you get 74 bits.

Pi OS: 64 Bits
64 Bit OS in 4GB RAM: -2 Bits
PDP-8/I OS: 12 Bits

Total: 74 Bits

Actual Costs:

Cost of Kit: $225 with shipping ($350 assembled with shipping)
Pi 3B w/4GB: $55 (the seller did not say how much memory was on the 3B I'm assuming the maximum 4GB)
PI Power Supply: $8 (anywhere from $6 to $10 on the web)
Sandisk 32GB Extreme $10 (anywhere from $6 to $15 on the web)

Total kit: $298
Total Assembled $423

So the cost new would be between $298 and $423.

Compared to having the kit assembled by Oscar (the creator) the seller spent $298 on the hardware and values their assembly time at $162.

Now if we add in shipping the cost will approach $480 - $500 depending on the sellers markup on the shipping for "handling" costs.

On 5/11/2024 7:08 PM, j...@ckrubin.us<mailto:j...@ckrubin.us> wrote:
I expect it's that 74-bit operating system that pushes it over the $400 mark.

On Friday, May 10, 2024 at 11:40:39 PM UTC-5 lfma...@gmail.com<mailto:lfma...@gmail.com> wrote:

I have an assembled and tested PiDP-8/I for sale. It includes includes:

Raspberry Pi 3 model B plus

SanDisk Extreme 32 gig memory module (Loaded with the latest Pi 74 bit operating system bookworm & PiDP-8/I software)

Raspberry Pi power supply

Built tested and burnt in for 72 hours PIDP –8/I

Sale Price: $460.00 + shipping and handling

[thumbnail_IMG_4336.jpg]

[thumbnail_IMG_4337.jpg]

[thumbnail_IMG_4341.jpg]

[thumbnail_IMG_4343.jpg]

[thumbnail_IMG_4345.jpg]

Thanks,

Lynn

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[timr...@gmail.com]

Well it is tested.  So that must add what $5?

[Mike Katz]

I acquired a PDP-8/I front panel "glass" some time ago.  I have a spare
un-built PiDP-8/I kit.  I am thinking of modifying the kit to use with
the full size actual panel glass.

I can build a frame out of wood for the LEDs and run wires to the
circuit board but what do i do for the switches.  I can 3D print the
switch handles and possibly the switch frames.  However, this requires
3D models for the PDP-8/I switch paddle as well as some say to attach it
to a switch.

Also, the front plastic coating is coming off in a couple of small places.

Does any body have any ideas for the switches and for the slight
delamination.

PICS of the panel and the damage can be found here:
https://drive.google.com/drive/folders/1kA3sawN73TJZuZuCMb99zJqx4Ye68dfD?usp=sharing

[Tim Radde]

I considered the same.  I have an 8i panel from PanelMan from some years back.  I considered using Vince's lights board too.  But the switches are the major problem here.

That's about as far as I got.  I could just have the panel blinking I suppose but the PiDP-8 does that for me.  So I keep the full size panel packed away in a drawer.  Is yours

a real 8i panel?  I have no idea what one does for delamination?

[Mike Katz]

According to the person I got it from it is original.

[Tim Radde]

I had two full 8i's back in the early 2000's.  One went to a good friend.  The other Paul Allen bought for his museum.  I was moving across the country and shipping those would have been a bear.  My favorite machine though as it's what I learned computers on.  I have a picture of my one system.  It was a 4 rack I think.  It was all pieced together over time.  Had 8k core.  I had the 24k Fabritek add on but never got it working.  One of the power rails was faulty.  It had two DF32s that I never powered up.  A TC08 with a TU56.  And two RK03s (I never remember the actually type).  1/2 of what an RK05 holds but looks like the same pack.  I had wanted to get more memory to run TSS/8 on it.  Never got that far. But the base 8k was solid.  It had a bit error on the external bus.  I never did figure that out.  I ran the RK03 exercisor test and it ran fine till it tried to write.  That was likely due to the bit error.  The dectape also would not boot.  Due to this same error.  I only realized this after I was fiddling with the dectape and had run the RK03 test months before.  Never put the two together.  But I knew the tape was good, but what got read in was not.  Oh well.  I do miss that system but it took up lots of space.

[Dennis Brothers]

In the early seventies, I had an 8I in my den.  The company I worked for manufactured microcomputers, so I cobbled together enough memory boards to bring the 8I up to a full 32K.  I also wired in a (non-DEC) high-speed paper tape reader.  My kids loved that machine.

I eventually replaced it with an 11.

    - Dennis, N1DB

[timr...@gmail.com]

I still have one real 11.  It's an 11/84.  But it has a faulty cache chip on the CPU board.  And I do not know which one.  The diagnostics do not really help there.  And the chips are all soldered in.  I have replacements but do not trust my desoldering skills to be that good.  It still runs if I tell it to turn off the cache, but it's much slower.  I'd prefer a real blinkenlights 11s.