Search found 87 matches

by listofoptions
06 Oct 2021, 16:01
Forum: Workshop
Topic: XT to 5251 Converter
Replies: 6
Views: 4892

Re: XT to 5251 Converter

this protocol is relatively simple and fairly well documented, no snipping from me though, too many pages from http://bitsavers.org/pdf/ibm/5250_5251/SY31-0461-3_5251_Display_Station_Models_1_and_11_MIM_Jul79.pdf you should look at pages 65-92 (pdf pages not page numbers) the basic process seems to ...
by listofoptions
15 Mar 2021, 22:48
Forum: Deskthority talk
Topic: Please welcome the new owners of Deskthority
Replies: 243
Views: 917336

Re: Please welcome the new owners of Deskthority

Phpbb doesn't do personal data or tracking except your email address and anything you posted or pm-ed, i.e. your own content. You can review your email and download your pm's. You can also delete stuff or ask for account deletion. Since you have 29 posts/pm's total, this should be trivial. All the ...
by listofoptions
02 Oct 2020, 02:13
Forum: Workshop
Topic: IBM 5251 terminal USB conversion (but not what you think)
Replies: 71
Views: 49130

Re: IBM 5251 terminal USB conversion (but not what you think)

thats cool, ive found some; let me know if these work, im planning on spinning up my own to do some data-sniffing around a system 32/34/36/38 i have occasional access to. here are my notes for the 5250 anyway: connector for panel mount connector Amphenol 082-5590-RFX cable ends use Amphenol 082-5589...
by listofoptions
01 Oct 2020, 02:11
Forum: Workshop
Topic: IBM 5251 terminal USB conversion (but not what you think)
Replies: 71
Views: 49130

Re: IBM 5251 terminal USB conversion (but not what you think)

I noticed you have either a panel mount or a pcb mount twinax connector on your boards there, got any part numbers? :D
by listofoptions
28 Sep 2020, 06:54
Forum: Workshop
Topic: IBM 5251 terminal USB conversion (but not what you think)
Replies: 71
Views: 49130

Re: IBM 5251 terminal USB conversion (but not what you think)

likely some more interesting information about the 5250 terminals will be found here http://bitsavers.org/pdf/ibm/system34/fe/SY-31-0458-6_IBM_System_34_Theory_Diagrams_Manual_Volume_2_198201/11_Work_Station_Attachment.pdf http://bitsavers.org/pdf/ibm/system34/fe/5340_Volume_D_ALD_sn0029238_Feb80.pdf
by listofoptions
17 Jul 2020, 03:43
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller

BTW, I would recommend a DAC with some faster bus. If you can reprogram it between scans, you can have per-column thresholds - which is not as good as per-cell, but close enough for practical purposes. yeah i wanted one originally but that would have driven the price up a bit, im still on the looko...
by listofoptions
07 Jul 2020, 08:26
Forum: Workshop
Topic: Beamspring from Hell Restoration Log
Replies: 43
Views: 37938

Re: Beamspring from Hell Restoration Log

all hail evaporust!
by listofoptions
07 Jul 2020, 07:04
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: Coming Soon - Through Hole Universal Model F and Beamspring Controller

kicad is still better than diptrace or FRAGGIN eagle. altium? well no mr moneybags its not, but at that price point literally nothing is good enough :D I'm new to all the helpful software but I'm going to bet on Fusion 360's January addition of Electronics: https://new.engineering.com/story/fusion-...
by listofoptions
07 Jul 2020, 06:57
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller

updates pushed, sans resistor and trace changes (would have pushed last week, but a lot of weird stuff has been happening) I need to resize for better and larger resistors, or baring that; switch to large smd resistors, not sure which would be more amenable to use. Ive also included the pull request...
by listofoptions
24 Feb 2020, 06:50
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: Coming Soon - Through Hole Universal Model F and Beamspring Controller

on the note of atmega being single sourced: duh, but my point was that its possible to swap out the microcontroller for another, only making some modifications to the firmware. Oh, _that_. No difference there either. All the FPGA stuff can be pulled out and implemented using discrete logic and driv...
by listofoptions
23 Feb 2020, 21:04
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: Coming Soon - Through Hole Universal Model F and Beamspring Controller

Id like to make the argument that the CommonSense controller does not use an "off the shelf" part. its a specific part that isnt made to by any other manufacturer, where as with the XWhatsIt design you can swap most of the parts around for other components, no particular reliance on a specific manu...
by listofoptions
07 Feb 2020, 20:40
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: Coming Soon - Through Hole Universal Model F and Beamspring Controller

I will work on getting BOM CSV's spun up for digikey, mouser, arrow, and farnell later this week too
by listofoptions
07 Feb 2020, 20:35
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: Coming Soon - Through Hole Universal Model F and Beamspring Controller

Ooh, this does look promising! Though admittedly CommonSense still has the advantage of off the shelf parts, even if it is a bit of a pain to configure. Id like to make the argument that the CommonSense controller does not use an "off the shelf" part. its a specific part that isnt made to by any ot...
by listofoptions
07 Feb 2020, 19:21
Forum: Workshop
Topic: READY - $10 - DIY Through Hole Universal Model F and Beamspring Controller
Replies: 100
Views: 35452

Re: Coming Soon - Through Hole Universal Model F and Beamspring Controller

contributions, and suggestions welcome! board is likely to go through *multiple* revisions, but thankfully its fairly modular. https://github.com/listofoptions/TH-XWhatsIt
by listofoptions
24 Jan 2020, 18:55
Forum: Keyboards
Topic: NCR K430 magnetic valve - Fixed! - second row from bottom was dead
Replies: 27
Views: 9056

Re: NCR K430 magnetic valve - Fixed! - second row from bottom was dead

May I ask a question about the PCB layout? What might be the purpose of the extra columns without holes in the loops, in between the columns which have holes in the loops where the ferrite beads attached to the keys pass through? Do these serve as reference loops against which the sensor loops are ...
by listofoptions
07 Jan 2020, 19:46
Forum: Workshop
Topic: IBM 029 keypunch keyboard repair and conversion
Replies: 13
Views: 6735

Re: IBM 029 keypunch keyboard repair and conversion

forgot to upload stuff when i last cleaned the 129, need to get back to it, its been a bit since i posted anything at all. this is about a month ago now. so this is the underside of the 129 https://i.imgur.com/HxPXJum.jpg its pretty much identical to the 029, sans the bails and bail contacts https:/...
by listofoptions
16 Dec 2019, 04:13
Forum: Workshop
Topic: [Interest Check] FK-5001/9000 calculator replacement
Replies: 45
Views: 19828

Re: [Interest Check] FK-5001/9000 calculator replacement

count me in! waht kind of unit cost are we looking at?
by listofoptions
03 Dec 2019, 20:00
Forum: Gallery
Topic: A phosphorglow restored 1391401!
Replies: 7
Views: 2902

Re: A phosphorglow restored 1391401!

dammit i thought we got rid of those damned-able spammers finally
by listofoptions
02 Dec 2019, 16:22
Forum: Workshop
Topic: IBM 029 keypunch keyboard repair and conversion
Replies: 13
Views: 6735

Re: IBM 029 keypunch keyboard repair and conversion

woops forgot to put the .jpg in the link otherwise what is mime encoding for right?
by listofoptions
02 Dec 2019, 16:15
Forum: Workshop
Topic: IBM 029 keypunch keyboard repair and conversion
Replies: 13
Views: 6735

Re: IBM 029 keypunch keyboard repair and conversion

sorry to bump and old thread, but ive almost got the converter built, just need the time to finish it, and program it. in other news i know have a IBM 129! here's some images from the ebay listing! https://imgur.com/m34zTeG.jpg i have to admit the buttons and dials and toggle switches look pretty ho...
by listofoptions
02 Nov 2019, 20:09
Forum: Deskthority talk
Topic: Deskthority Fundraising Campaign 2019
Replies: 77
Views: 84749

Re: Deskthority Fundraising Campaign 2019

matt3o, would a fundraiser raffle for a specialty one-off artisan work? id be down for a raffle for a cap that would never get made again, specifically so we could keep funding this repository of work! something like 25-75 usd for 1 to 3 raffle tickets.
by listofoptions
29 Oct 2019, 21:11
Forum: Keyboards
Topic: IBM 5251 Beamspring Xwhatsit converter problem.
Replies: 24
Views: 7944

Re: IBM 5251 Beamspring Xwhatsit converter key mapping problem help.

just make sure to be very careful in sanding that connector, you're only trying to break any oxide or light corrosion, if you see copper STOP!
by listofoptions
29 Oct 2019, 19:57
Forum: Keyboards
Topic: IBM 5251 Beamspring Xwhatsit converter problem.
Replies: 24
Views: 7944

Re: IBM 5251 Beamspring Xwhatsit converter key mapping problem help.

no its almost certainly the edge connector. ive restored a handful of 5251's its usually the only place they can stop working, even with corroded looking pcbs. get some 1k grit or higher sandpaper, and use some isopropanol to gently sand the connector. since you've got it apart already clean the pcb...
by listofoptions
29 Oct 2019, 17:42
Forum: Gallery
Topic: Houston Warehouse Haul (Oct 2019)
Replies: 14
Views: 6398

Re: Houston Warehouse Haul (Oct 2019)

looks like i need to finish my converter then :D kinda sad about that 029 sans its brain and body. please tell me you didnt get it removed from the rest of it!
by listofoptions
21 Oct 2019, 17:44
Forum: Off-topic
Topic: Unpopular opinions thread
Replies: 456
Views: 282198

Re: Unpopular opinions thread

Apparently, American beer is far worse than Canadian beer (at least that's what every Canadian says). Thankfully, I've never tried American beer. Yes, we didn't have anything good while we were in the US either :XD: . I don't think much of most German beers either; many are a bit bland for my taste...
by listofoptions
21 Oct 2019, 17:43
Forum: Off-topic
Topic: Unpopular opinions thread
Replies: 456
Views: 282198

Re: Unpopular opinions thread

I hate all big budget movies nowadays. Always the same shit story in different clothes, dumbed down for a global market. The last big budget movie master piece was probably Starship Troopers, and that was only possible because it was such a nasty hidden troll in a sci-fi flick. ... master piece? St...
by listofoptions
07 Oct 2019, 19:23
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 55
Views: 24333

Re: 65% Model F – Open Group Build

abrahamstechnology wrote:
07 Oct 2019, 19:15
Why don't we try using regular Model M flippers with capacitive foil attached to the bottom?
surface area mostly
by listofoptions
26 Sep 2019, 21:05
Forum: News
Topic: Modern Beamspring? - The Silo Beam Switch
Replies: 56
Views: 98245

Re: Modern Beamspring? - The Silo Beam Switch

you'd need a custom PCB made for any existing boards, due to the hall effect sensor. i guess they could have gone with a 2-wire hall effect sensor and integrated it into the switch, but that means reliance on one sensor, and engineering a custom frame to hold the sensor; engineering an assembly proc...
by listofoptions
16 Sep 2019, 22:28
Forum: For sale
Topic: DataSaab keyboard from an old Alfaskop 3700 terminal
Replies: 14
Views: 7765

Re: DataSaab keyboard from an old Alfaskop 3700 terminal

I'll have to give this a pass for now! super sorry i haven't responded in a while, work got stupid busy, etc... snacks go ahead if you want this!

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