Date   

Re: Happy 74th Birthday ENIAC

Brian L. Stuart
 

I'm not actually simulating the entire machine in
SPICE. I've simulated just some of the building
blocks, like the flip-flops, counters, transmitters,
and receivers. My pulse-level simulation is as
detailed as I plan to get for the whole machine.

For that matter, I haven't yet implemented the
core added in '53 (or maybe '52; I forget) to my
simulator.

BLS

On Saturday, February 15, 2020, 02:51:22 PM EST, Andy Craig <andycraig@...> wrote:


I haven't had a chance to look yet but I am curious how you get Spice to handle punch card and magnetic core memory. 

On Sat, Feb 15, 2020, 2:08 PM Brian L. Stuart <blstuart@...> wrote:
On this, the 74th anniversary of the unveiling of
the ENIAC, I've decided to post a couple of things
I've been working on.  The first is the 3D model
of the ENIAC mentioned before.  It's designed
using brlcad, from the Ballistics Research Lab.
It just seemed too appropriate to model it using
the tool devleoped where it lived.  The
thingiverse link is:

https://www.thingiverse.com/thing:4164825

The second thing is a draft of a chapter from a
book I'm in the very early stages of.  It
describes the basic circuit designs used in the
ENIAC with SPICE simulations of them.  The layout
and formatting are based on the old Army Technical
Manuals of the time.

http://cs.drexel.edu/~bls96/eniac/ch1.pdf

Enjoy,
BLS




Re: Happy 74th Birthday ENIAC

Andy Craig
 

I haven't had a chance to look yet but I am curious how you get Spice to handle punch card and magnetic core memory. 


On Sat, Feb 15, 2020, 2:08 PM Brian L. Stuart <blstuart@...> wrote:
On this, the 74th anniversary of the unveiling of
the ENIAC, I've decided to post a couple of things
I've been working on.  The first is the 3D model
of the ENIAC mentioned before.  It's designed
using brlcad, from the Ballistics Research Lab.
It just seemed too appropriate to model it using
the tool devleoped where it lived.  The
thingiverse link is:

https://www.thingiverse.com/thing:4164825

The second thing is a draft of a chapter from a
book I'm in the very early stages of.  It
describes the basic circuit designs used in the
ENIAC with SPICE simulations of them.  The layout
and formatting are based on the old Army Technical
Manuals of the time.

http://cs.drexel.edu/~bls96/eniac/ch1.pdf

Enjoy,
BLS




Happy 74th Birthday ENIAC

Brian L. Stuart
 

On this, the 74th anniversary of the unveiling of
the ENIAC, I've decided to post a couple of things
I've been working on. The first is the 3D model
of the ENIAC mentioned before. It's designed
using brlcad, from the Ballistics Research Lab.
It just seemed too appropriate to model it using
the tool devleoped where it lived. The
thingiverse link is:

https://www.thingiverse.com/thing:4164825

The second thing is a draft of a chapter from a
book I'm in the very early stages of. It
describes the basic circuit designs used in the
ENIAC with SPICE simulations of them. The layout
and formatting are based on the old Army Technical
Manuals of the time.

http://cs.drexel.edu/~bls96/eniac/ch1.pdf

Enjoy,
BLS


Re: Weather on Saturday

Mauricio
 

Any update on a replacement date?


- Mauricio


On Sat, Feb 8, 2020 at 10:26 AM Earl Baugh <earl.baugh@...> wrote:

I’ve got a couple inches of snow on the ground and road. And it is still coming down. So for safety’s sake we will be canceling.  I’ll check with Brad for an alternative Saturday this month. 


Earl


Re: IBM JX

Earl Baugh
 

That's way cool. 

Wonder what it would cost with import fees...

Earl


On Thu, Feb 13, 2020 at 4:41 PM James Mahoney <a11anmah0n3y@...> wrote:
https://page.auctions.yahoo.co.jp/jp/auction/f373725721


IBM JX

James Mahoney
 

https://page.auctions.yahoo.co.jp/jp/auction/f373725721


Re: Guy Kawasaki interview with Woz

Andy Craig
 

Very interesting. Woz is da man though it almost sounds like he invented the floppy disk in his telling.

I invented the hole puncher tool to flip over your disks and double the capacity on single sided Commodore disk drives. I had folks doing product testing on sheets of paper for a few decades prior. 😜



On Mon, Feb 10, 2020, 4:39 PM Ben Bradley <ben.pi.bradley@...> wrote:
This has some good Woz stuff I haven't heard or read before:
https://guykawasaki.com/steve-wozniak/




Re: Leaving the club for a while...

@AtariLynxHandyCast
 

Sorry to hear it, Alan, but I totally understand. Good luck, and I look forward to when you’ll be back with us.


Re: Jet Brains Licenses

groupsio@...
 

Hey there, if nobody needs one this time around, I'd be glad to get another one. TeamCity is looking good to try.

On 2/9/2020 3:28 PM, Earl Baugh wrote:
Another one arrived this week ---

Same request -- if you'd like one (for any of their products -- IntelliJ, etc.)
Let me know.  First come, first served.  (We get one each month from them for being a "club")
If you've had one in the past and it's been close to a year, feel free to ask again..

Earl


Guy Kawasaki interview with Woz

Ben Bradley
 

This has some good Woz stuff I haven't heard or read before:
https://guykawasaki.com/steve-wozniak/


Re: Commodore Amiga 500

Pete Rittwage
 

They vary widely depending on many factors, but complete with mouse and power supply and 512k expansion with no known issues?
A little north of that. 

I am seeing more like $250 in modern times for a clean working machine. Reduce that for missing parts, and much more for any problems. It's much hard to find them 100% working now, unless you can repair yourself for a bargain price. :)

-Pete




On Mon, Feb 10, 2020 at 11:03 AM, Unblakeable <msblake@...> wrote:
My opinion - Assuming it works and is in good cosmetic condition, $150 eBay (give or take shipping), $100 non- eBay (I think the discount is appropriate because you won't likely get a return and packing computers properly for shipping is time-consuming).

-- mike

--
Michael S. Blake, CFA, ASA, ABAR


Re: Atari collection preservation

Andy Craig
 

Exciting! I will ogle with much fascination but will resist adopting as I still have a 3yr old 800XL acquisition that needs love. 


On Mon, Feb 10, 2020, 7:32 AM Unblakeable <msblake@...> wrote:
Update - I brought the haul home yesterday.  It was as lucrative as advertised and there is a ton of software and plenty of hardware.  I filled up an entire Yukon (rented) and it will take multiple trips to bring this stuff to the club.  So we'll start next meeting...


Re: Commodore Amiga 500

Andy Craig
 

To see market price,  do a search for Amiga 500 on eBay, use the filter option and enable "sold items" to see what they're really selling for, not the asking prices, because some of them will be crazy high for any item on eBay. 

Does the eBay going price = fair price? You decide. 😁

Side note: you can get Amigas for much cheaper in the UK by ordering from the UK site of eBay but the risk of smashed plastics is much higher on this long journey. 
Some would say a PAL Amiga is more desirable than NTSC tho. 





On Mon, Feb 10, 2020, 10:50 AM John Czerwinski <johndczerwinski@...> wrote:
I know someone that might be selling a Commodore Amiga 500 and wanted to know what you think a fair price might be.


Re: Commodore Amiga 500

Unblakeable
 

My opinion - Assuming it works and is in good cosmetic condition, $150 eBay (give or take shipping), $100 non- eBay (I think the discount is appropriate because you won't likely get a return and packing computers properly for shipping is time-consuming).

-- mike

--
Michael S. Blake, CFA, ASA, ABAR


Commodore Amiga 500

John Czerwinski
 

I know someone that might be selling a Commodore Amiga 500 and wanted to know what you think a fair price might be.


Re: Couple of PS/2 Model 30s on facebook marketplace

John Czerwinski
 

I got the PS/2 and will bring them at the next meeting.  I would just ask $35 per unit to cover what I paid.  Also, I told the seller about the AHCS and he donated a bunch of other stuff that I'll bring as well.


From: main@ahcs.groups.io <main@ahcs.groups.io> on behalf of Andrew Taylor <andrewstm244@...>
Sent: Sunday, February 9, 2020 12:09 PM
To: main@ahcs.groups.io <main@ahcs.groups.io>
Subject: Re: [ahcs] Couple of PS/2 Model 30s on facebook marketplace
 

Ha, I wouldn't mind. I love a good clean-up challenge


Re: Atari collection preservation

Unblakeable
 

Update - I brought the haul home yesterday.  It was as lucrative as advertised and there is a ton of software and plenty of hardware.  I filled up an entire Yukon (rented) and it will take multiple trips to bring this stuff to the club.  So we'll start next meeting...


Jet Brains Licenses

Earl Baugh
 

Another one arrived this week ---

Same request -- if you'd like one (for any of their products -- IntelliJ, etc.)
Let me know.  First come, first served.  (We get one each month from them for being a "club")
If you've had one in the past and it's been close to a year, feel free to ask again..

Earl


Re: Couple of PS/2 Model 30s on facebook marketplace

David Iwanicki
 

Worked with those at State Farm in Oregon over 20 years ago. They are pretty decent when paired with OS2/Warp 3

David

On Feb 9, 2020, at 12:09, Andrew Taylor <andrewstm244@...> wrote:



Ha, I wouldn't mind. I love a good clean-up challenge


Re: Couple of PS/2 Model 30s on facebook marketplace

Andrew Taylor
 

Ha, I wouldn't mind. I love a good clean-up challenge