The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘6502’ Category

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A lot of GitLab pages links and Git pushing a relatively large commit to GitLab: “error: RPC failed; HTTP 502 curl 22 The requested URL returned error: 502”

Posted by jpluimers on 2026/05/27

Got an error when pushing a relatively large commit to GitLab: error: RPC failed; HTTP 502 curl 22 The requested URL returned error: 502

There was no big difference in information between these commands¹:

  1. git push
  2. git push --verbose

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Posted in //e, 6502, Apple, Apple ///, Apple IIgs, Apple ][, Development, DVCS - Distributed Version Control, git, GitLab, History, Power User, Software Development, Source Code Management, Versioning | Leave a Comment »

I Built a Commodore 64 Laptop That Never Existed (PI + EMULATION) – The Portable 64 Concept Design – YouTube

Posted by jpluimers on 2026/05/06

Cool to see what 3D printing plus a Raspberry Pi emulating a C64 can do [Wayback/Archive] I Built a Commodore 64 Laptop That Never Existed (PI + EMULATION) – The Portable 64 Concept Design – YouTube.

The Portable 64 with an original Commodore 64 joystick

The Portable 64 with an original Commodore 64 joystick

However, published in December 2025 after Commodore had been resurrected from the C= brands, it would have been way cooler if was based on new Commodore 64 Ultimate hardware.

Maybe someone will do such a portable computer based on that hardware, or even better that it becomes available at [Wayback/Archive] Home | Commodore.

--jeroen

Posted in Development, Power User, History, Hardware Development, 6502, 3D printing, Commodore, C64, Retrocomputing | Leave a Comment »

Memories of the past: “Microsoft® Computer Dictionary, Fifth Edition”, ISBN 9780735614956

Posted by jpluimers on 2026/02/13

While researching early Intel 8087 documentation distributed via LISTSERV, the below blast from the past also turned up: back in 2002 computer dictionaries were also available as … books!

[Wayback/Archive] Microsoft® Computer Dictionary, Fifth Edition (Cpg-Other): 9780735614956: Computer Science Books @ Amazon.com

  • Publisher ‏ : ‎ Microsoft Press; 5th ed. edition (June 1, 2002)
  • Language ‏ : ‎ English
  • Paperback ‏ : ‎ 637 pages
  • ISBN-10 ‏ : ‎ 0735614954
  • ISBN-13 ‏ : ‎ 978-0735614956
  • Item Weight ‏ : ‎ 2.85 pounds
  • Dimensions ‏ : ‎ 7.33 x 1.76 x 9.25 inches

It is available from various sources including [Wayback/Archive] Microsoft Computer Dictionary – Microsoft Press – Google Books and [Wayback/Archive] microsoft_computer_dictionary__fifth_edition1.pdf.

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Posted in 6502, 68k, 8086, 8087, 8087, 8088, Development, History, Software Development | Leave a Comment »

Apple II: Single Step in Monitor | Applefritter

Posted by jpluimers on 2026/02/10

I need to check out which ROM my Apple //e and //c have as per [Wayback/Archive] Single Step in Monitor | Applefritter comment by [Wayback/Archive] jeffmazur | Applefritter:

Depends upon which machine and ROM version you have.

The original Apple II monitor does have an S command to single step code in the Monitor. That was removed however to add other features and was not restored until ROM00 of the //c. There are however various 3rd-party ROM images that also have the Step and Trace commands, for example ROMeX and ROM4X, APPLEII.EDM, etc.

There are also hardware boards available to do this as well

Links

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Posted in //e, 6502, Apple, Apple ][, History, Power User, Retrocomputing | Tagged: | Leave a Comment »

Bit by Bit – Exploring Low-Level Programming on the Apple IIe | decuser’s blog

Posted by jpluimers on 2026/02/05

At the time of posting [Wayback/Archive] Bit by Bit – Exploring Low-Level Programming on the Apple IIe | decuser’s blog in 20251010, four episodes were up at [Wayback/Archive] Bit by Bit – Exploring low-level programming with an Apple IIe – YouTube which at the time of archiving at the end of October 2025 already got 10 episodes.

Hopefully by now – some 2 months later – the list has grown even further.

Via [Wayback/Archive] Bit by Bit – Exploring Low-Level Programming on the Apple IIe | Applefritter who explains further than the blog post:

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Posted in //e, 6502, 6502 Assembly, Apple, Assembly Language, Development, History, Power User, Retrocomputing, Software Development | Leave a Comment »

Karateka IBM PC Model 5150 Longplay – YouTube

Posted by jpluimers on 2025/11/28

Karateka (which appeared way before the even more famous Prince of Persia which appeared 5 years later) memories of the past, for which I totally agree with the conclusion: the game on Apple ][ was way better:

[Wayback/Archive] 𝔸𝕟𝕒𝕥𝕠𝕝𝕪 𝕊𝕙𝕒𝕤𝕙𝕜𝕚𝕟💾 on Twitter: “@textfiles Jordan’s opinion on the IBM version”

JULY 31, 1986 Just looked at the JULY 31, 1986
Just looked at the “final” version of PC Karateka. It seemed OK, I guessed, except for overall sluggishness, frequent disk accesses, and a few minor graphics glitches. Then I booted up the Apple version to compare… and it was so smooth, it made me want to cry.
The PC version is maybe 50% of what it should be. I can’t even tell these guys s what to fix… it’s a million little things, and they’re just not up to the hassle. That kind of attention to detail is why the Apple version took me two years. This version is probably the best I’ll ever get out of them.

You can play the PC version online at [Wayback/Archive] Karateka IBM Version 1986-01-30 (1986-02-04) (ID 0873) : Jordan Mechner : Free Download, Borrow, and Streaming : Internet Archive

Internal Alpha version (1986-01-30) of the IBM port of Karateka by Jordan Mechner.

It was ported to many platforms, and there was a great documentary too. So there are more YouTube links below than [Wayback/Archive] Karateka IBM PC Model 5150 Longplay – YouTube which has this great description:

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Posted in 6502, 8086, 8088, C64, Commodore, History, IBM PC Model 5150, Power User, Retrocomputing | Leave a Comment »

More Apple ][*, //* II* and classic Macintosh hardware upgrades

Posted by jpluimers on 2025/11/14

The mini micro classic Apple emulators related post last week became way too big, so here is the classic Apple 2/Macintosh hardware upgrade part follow-up I announced in Some notes on mini/micro Apple //e emulators.

Last week, I mentioned [Wayback/Archive] ARC Javmaster – YouTube. Let’s continue from there for an even bigger post (:

Javmaster actually has a shop at [Wayback/Archive] Welcome to the 8-bit stuff store – 8 bit stuff cool retro computer 3D gadgets and geekery with a lot of interesting (mainly Apple ][ era related) retro things like:

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Posted in //e, 6502, Apple, Apple ][, Classic Macintosh, History, Macintosh SE/30, Power User, Retrocomputing | Tagged: , , , , , , , , | Leave a Comment »

Some links on the Apple IIc Plus (Apple IIc + on the boot screen) likely the rarest from the Apple II series

Posted by jpluimers on 2025/05/16

A while ago I bumped into this video about likely the rarest model in the Apple II series: the Apple IIc Plus:

[Wayback/Archive] Apple IIc Plus – the rarest and fastest Apple II! – YouTube

Returning to one of my favorite subjects – the Apple II – I decide to finally repair a broken Apple IIc Plus gifted to me a little more than a year ago. This machine was the final true hardware revision to the Apple II line, coming in 1988, and the last standalone machine in the line released. It was also the fastest, with a 4Mhz CPU (vs. 1Mhz in most other Apple II’s, and 2.6Mhz in the IIGS). But it was a problematic machine for Apple, with a concept that had been watered down to the point of, well, pointlessness.

The market wanted it even less than it wanted the original IIc (which was my first computer – the one in the thumbnail is my original machine). Still, it is an interesting computer for its accelerated CPU, and its somewhat anachronistic nature at the time of its launch.

It has a cool demo of Flight Simulator II demo mode (which back in those days crashing the plane – demo modes luckily improved from there :) at both 1 Mhz and 4 Mhz. It indeed is not smooth, but a lot faster.

The problem back in those days with acceleration is it would not just improve render speed, but also increase clock time speed. It made most games almost impossible to play in accelerated mode.

If I ever get one, I need to replace the 110V power supply with a 240V/110V auto-switching one as per [Wayback/Archive] IIc + 240v Power:

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Posted in 6502, Apple, Apple ][, History, Power User | Leave a Comment »

Welcome to #AprilApples! Apple II Computer event celebrated in the month of April

Posted by jpluimers on 2025/04/01

AprilApples Apple II Computer Event LogoLast year, #Appril][ got rebranded into #AprilApples, so I wish you a happy retro-month filled with April Apples!

[Wayback/Archive] Welcome to #AprilApples! Apple II Computer event celebrated in the month of April

Consider using the [Wayback/Archive] #AprilApples Style Guide with logon on the right, plus Garamond and/or Motter Tektura typeface when possible to really give tribute to the Apple ][ era.

Last year, a big surprise was that Apple Computer put a PDF version of the famous Apple Pascal Poster on the Internet Archive.

So today is a great day to give that more traction and link to it:

A year before, during April][, a remake of that poster got done on AppleFritter: Home[Wayback/Archive] Apple pascal poster, remade | Applefritter

Via [Wayback/Archive] Javmaster@bsky.social: “http://appril2.com/ ” – Mastodon

Fonts:

Images (I used a solid CSS brown background so you can see the difference between the regular logo and the outlined logo):

--jeroen

Posted in //e, 6502, Apple, Apple ///, Apple Lisa, Apple ][, Classic Macintosh, History, Power User | Tagged: , , | Leave a Comment »

Embedding a Floppy Emu in a standard APPLE II Floppy Disk Drive – YouTube

Posted by jpluimers on 2025/03/25

Interesting modification: [Wayback/Archive] Embedding a Floppy Emu in a standard APPLE II Floppy Disk Drive – YouTube

STL: [Wayback/Archive] FermuAssembly.STL – Google Drive [Wayback] FermuAssembly.STL

Buttons: [Wayback/Archive] 3/4/5-Bit Independent Button Module MCU External Button Module Micro Switch Button Board Bluetooth-compatible Power Amplifier – AliExpress 502

--jeroen

Posted in //e, 6502, Apple, Apple ][, Development, Hardware Interfacing, History, Power User, Retrocomputing | Leave a Comment »

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