Vintage computing Podcast for all types of retrocomputers
host: Randy Kindig
twitter: @floppydays
on iTunes and Stitcher Radio (
part of the Throwback Network (

The HP Series 80 (HP83/85/86/87)

This episode is the third and final in a series about the Hewlett Packard HP-85 computer, or more accurately, the entire line of similar computers known as the HP Series 80.  Once again, I have the tremendously knowledgeable duo of Everett Kaser and Vassilis Prevelakis helping me impart information to you about that venerable line of historically significant desktop computers.  In this episode, we will primarily be covering tech specs, peripherals, expansion, magazines and newletters, books, emulation, modern upgrades, connectivity to modern computers, buying one today, community and Web sites.  Wow, now that I list this out, it’s obvious we have a lot to cover.  In addition, I will briefly talk about my new vintage computer acquisitions, feedback and perhaps a little news.

Links Mentioned in the Show:

New Acquisitions

Tech Specs

Popular Magazines/Newsletters



  • The Forth ROM was recovered with the help of Everett Kaser and Don Person, but was written by Larry Woestman. The following ZIP file contains source code as well as image files for the HP-85 and HP-87: HP-85 / HP-87 Forth ROM:
  • André Koppel wrote some utilities for the HP-87 called SYSEXT, which he transferred to a ROM. This can be downloaded together with a manual in German from

Modern Upgrades

  • expansion - PRM-85 (Bill Kotaska (USA), with support from John Shadbolt (UK))  e-mail if interested
  • HP85 recreation with an FPGA - FPGA HP85B
  • SD or CF card interface - HP85DISK - HP-85 Disk Emulator using AVR and MicroSD card for classic HP series 80 computers - by Mike Gore

Connectivity to Modern Computers



Current Web Sites

Direct download: 67FloppyDays_2016_11_HP85B_Part_3.mp3
Category:general -- posted at: 7:00pm EDT

Welcome to Episode 66 of the Floppy Days Podcast, where we try to relive our youth by talking about computers nearly as old as we are.  Vintage Computer Festival Midwest #11 recently happened on Sep. 10 and 11, 2016 in Elk Grove Village, IL and I managed to find my way there again this year.  Once again, I had an incredible time at the event and thought I’d share some of it with you.  I managed to get a few interviews, meet several people I had never met before, catch up with old friends, and come home with far more items than I left with.  So, I plan to give you a quick run-down of the event through my eyes and I hope you find this interesting.

Links Mentioned in the Show:

00:00 Theme Song

01:20 Ads

01:49 Intro

02:34 CoCo Crew Ad

03:21 Presentations Discussion

05:53 My Presentation (audio)

27:56 My Exhibit

31:21 Intro to Peter Bartlett Interview

32:00 Peter Bartlett Interview

34:54 Intro to Evan Wright Interview

35:35 Evan Wright Interview

44:41 Intro to Simon Wells Interview

45:18 Simon Wells Interview

59:26 My Purchases

1:07:36 What I didn't buy, TI-99 UStream, and Cosmac Elf Exhibit

1:11:19 Conclusion

Direct download: 66FloppyDays_2016_10_VCFMW_11_Post_Show.mp3
Category:general -- posted at: 11:00pm EDT

Welcome to Episode 65 of the Floppy Days Podcast, where a summer computer camp for middle-aged geeks is the highlight of our year.  My name is Randy Kindig.  This is a very special edition of Floppy Days produced and contributed by my good friend Mike Whalen and it includes sound bites from many of the attendees of this year’s annual week-long KansasFest Apple II event that always happens in Kansas City, Missouri.  Mike is a long-time Apple II and retro-computer fan and one of the hosts of the currently-dormant Electric Dreams BBS Podcast.  I met Mike at the one-and-only KansasFest event that I’ve been able to attend thus far, that being in 2014.  I would certainly recommend the event to anyone that enjoys getting together with a large number of vintage computer nuts for an entire week, living the college dorm life, and generally immersing themselves in the out-of-date-but-still-loads-of-fun Apple II computer.  It’s one of things that you must experience at least once, although for most people it tends to be like Lay’s Potato Chips: no one can stop at just one.

I’m amazed at the effort and quality Mike put into this podcast.  I want to thank him and the Apple II KFest community for allowing me to air this ode to KFest on Floppy Days.


KansasFest Website -

KansasFest talks on Internet Archive -

KansasFest HackFest -

KansasFest Door Contest from 2015 -

YouTube playlist of Dr. Steven Weyrich's KFest-related Parody Songs -

Twitter Accounts for some of the folks involved:

@a2fan -- Sean Fahey

@the_jongleur -- Michael Mulhern

@quinndunki -- Quinn Dunki

@callapple -- Call A.P.P.L.E.

@retroconnector -- Charles Mangin

@kevinsavetz -- Kevin Savetz

@CT6502 -- Chris Torrence

@textfiles -- Jason Scott

@65816guy -- Dagen Brock

@ultramagnus_tcv -- Mike Whalen

Call-A.P.P.L.E. -

Call-A.P.P.L.E.'s "Nibble Viewpoints - Business Insights From The Computing Revolution" by Mike Harvey

Reactive Micro -

8-Bit Weapon -

Bits With Byte -

BlipTastic by ComputeHer -

Charles Mangin's RetroConnector -

Quinn Dunki's Blog -

Nibble Magazine -

Mike has provided links in the show notes for Web sites that can help you find out more about the attendees you heard in this episode and about KFest itself ; just go to for the full list.  If you wish to contact Mike about this episode, you can find some contact information for him in the show notes.

I very much encourage you to provide feedback for the show at iTunes or on the Web site, via email at, via Twitter at @floppydays or on Facebook, at .  I also want to mention that Floppy Days is also a member of the Throwback Network, a network of retro-themed podcasts.  Check it out at  For one more way to listen, Floppy Days is also available for streaming at

Until the next show, pull out a vintage computer and compute as if it were yesterday.


Direct download: 65FloppyDays_2016_10_Week_of_the_KFest.mp3
Category:general -- posted at: 3:00am EDT

The HP-85B Microcomputer, Part 2

Hello, and welcome to episode 64 of the Floppy Days Podcast, where old computers come to live.  I’m Randy Kindig and I’m happy to bring you this episode this month.  This episode is Part 2 about the HP Series 80 line of microcomputers.  Last month I interviewed 2 well-known members of the HP Series 80 community, Everett Kaser former HP engineer who worked on the Series 80 and runs and Vassilis Prevelakis of  This month, they are back to help me talk about the history of these fabulous machines.  It’s a fascinating conversation with two gentlemen who have a lot of love of and knowledge about these machines.

I want to thank Everett for providing the intro to this episode with his memories of the Series 80.

Before getting into the meat of the program, I do intend to talk briefly about any new vintage computer acquisitions, upcoming shows and feedback.

Ok, let’s fire up the ol’ HP-85 and see what we can learn.

Links Mentioned in the Show:


New Acquisitions



Direct download: 64FloppyDays_2016_08_HP85B_Part_2.mp3
Category:general -- posted at: 10:04pm EDT

Vintage Computer Festival Midwest 11, Sep 10-11, 2016, Elk Grove Village, IL

This a special interview show to help get the word out about an upcoming event: Vintage Computer Festival Midwest.  This will be the eleventh iteration of this event and I talk with Jason Timmons, one of the main organizers of the event.  He tells us all about the event, including guest speakers that will be there, exhibits, vendors and much more.  If you can make it to the Chicago area the weekend of September 10 & 11, 2016, I highly recommend that you drop in and enjoy the show.


Direct download: 63FloppyDays_2016_08_VCFMW11_with_Jason_Timmons.mp3
Category:general -- posted at: 12:52am EDT

Welcome to episode 62 of the Floppy Days Podcast, where a little smoke once in a while is a hazard of the hobby.  In the vintage computer timeline, we are still in the 1979 to 1980 timeframe.  This month we are covering the HP-85 desktop computer, or actually the entire series of which the HP-85 was a part known as the HP Series 80.

I struck gold when I found the two gentlemen who are co-hosting this episode with me.  First is Everett Kaser, who worked for HP for 20 years and was intimately involved in the development and support of the HP-85.  Secondly, we have Vassilis Prevelakis, who runs one of the best resources about the HP Series 80 in existence today,  Once we started talking, and I interviewed the two gentlemen, I realized we were going to need a multi-part show to cover the large amount of information and history around this significant platform.  So, the first show will be the interview with Everett and Vassilis and next month we will get into history, tech specs, emulation, Web sites, and all of the other information I like to cover.

Before we get into that, however, I will cover new acquistions, a little news, and some feedback I’ve received.

Links Mentioned in the Show:

New Acquisitions/What I’ve Been Up To




Direct download: 62FloppyDays_2016_07_The_HP85B.mp3
Category:general -- posted at: 11:26pm EDT

VCF West Official Site -

Direct download: 61FloppyDays_2016_07_VCF_West.mp3
Category:general -- posted at: 11:45pm EDT

Welcome to episode 60 of the Floppy Days Podcast, where vintage in the term vintage computers simply means “cool”.  My name is Randy Kindig.  I am happy to bring you this month the follow-up or second of two episodes on the HP41C programmable calculator.  Once again, I have two stellar members of the HP41 community, Richard J. Nelson and Gene Wright, with me to bring you all the information you care to know about the HP41.  That includes a wrap-up to the history of the machine, tech specs, books, software, newsletters, modern upgrades, emulation, current Web sites, and so much more.  Before that, I do want to discuss a few new acquisitions that have come my way, as well as some feedback I’ve received from listeners.

Links Mentioned in the Show:


Modern Upgrades


Web Sites

Museum Document Sets -

Direct download: 60FloppyDays_2016_06_HP41_Part2.mp3
Category:general -- posted at: 11:30pm EDT

Hello, all, and welcome to the next installment of the podcast that says “vintage electronics: I WANT IT”.  I’m Randy Kindig and I’m your host.  This episode is the first of a 2-parter on the Hewlett Packard HP-41 line of programmable calculators.  The HP-41 is a seminal example of programmable calculators from the late 70’s and into the 80’s and is still very desirable and sought after today.  I was lucky enough to find 2 gentlemen to co-host who are well-known among the active HP calculator community that exists today: Richard J. Nelson, who has written, edited, and published as much HP-41 material as anyone ever.  And Gene Wright who is on the HP Handheld Conference Committee and he was a TI fan before becoming “hooked” on the HP-41.  In this first part on the HP-41, I interview the co-hosts and then we cover the history of the calculator line in detail.  Next month, with the same co-hosts, we will cover Web sites, emulation, software, and much more.

To start out, as usual, I will cover my new vintage computer acquisitions, a little news, and some feedback.

I hope you enjoy this and please let me know what you think.

Links Mentioned in the Show:

New Acquisitions


Upcoming Shows


Interview and History



Direct download: 59FloppyDays_2016_05_HP41_Part1.mp3
Category:general -- posted at: 12:51am EDT

Ralph Rees, Editor, VAST TI-99 Newsletter

Hi, everyone and welcome to episode 58 of the Floppy Days Podcast.  I’m Randy Kindig.  To sort of finish off the TI-99 series of episodes I’ve been running, I have an interview-only show for you this month.  This interview is with Ralph Rees, president and newsletter editor of the VAlley of the Sun TI-99ers (VAST) back in the 1990’s.  He produced his high quality newsletter directly on a TI-99 system and received quite a few compliments about it while it was still being published.  Ralph still has an extensive TI-99 collection today.

This interview was conducted on June 7, 2015.


The Western Horizon Technologies FTP server -


Direct download: 58FloppyDays_2016_04_Ralph_Rees_Interview.mp3
Category:general -- posted at: 3:00am EDT