Advent of Computing
Advent of Computing explores the surprising and often overlooked history of computing. Each episode delves into the stories behind technologies we take for granted, revealing how older innovations have shaped our modern world. The show covers a wide range of topics, from early hardware to software and the people behind them.
Episodes
Usagi Electric and the LGP-21 Restoration
Who can't resist Librascope hardware? Well, me, for one. And David from Usagi Electric is in the same boat. In this episode we sit down to talk about his LGP-21, how he got it, how he got it working, and what the machine can do! Subscribe to Usagi Electric to see the full project: https://www.youtube.com/@UsagiElectric
Episode 188 - Training and Teaching with the Bi-Tran Six
How did you learn about computers? And how in depth was your education? For some the answer is the Bi-Tran Six: an educational machine released in 1965. This was one of the first computer trainers, and it represents a very interesting take on design. It's a machine that's small, simple, and can even be disassembled while running. But exactly how was it designed, and what was it used for? What make
Episode 187 - What's Better Than Binary?
Binary is synonymous with digital computing. But is it the only way to crunch numbers? The short answer is no. The long answer, well, that's today's topic. Today we are talking about ternary, aka base 3. From it's early uses in the 19th century, to actual computers, and even theoretical designs; ternary proves to be a difficult topic to track down... and a very unique one. Selected sources: https:
LIVE from VCF West - Wait, Is That Really UNIX?
It's no secret that I've been fascinated by odd UNIX clones for a while. When I got invited back to speak at VCF West this year I decided to share that fascination with a captive audience. In this talk we look at Idris and CROMIX, and ask the simple question: why would you want UNIX free UNIX? VCFed will be posting the video version of this presentation in the coming weeks. I'll add a link here on
Episode 186 - MADDIDA
In 1950 Northrup unveiled their MAgnetic Drum DIgital Differential Analyser. The machine is a wild piece of technology; a rendering of an analog computer in digital encoding. But how did we get here? How did a project to guide a missile lead to a mass produced computer? And what does it have to do with suspiciously dry martinis? Selected Sources: https://sci-hub.st/10.1109/MAHC.2003.1179869 - 2003
Episode 185 - Is EMUL-8ion a Form of Flattery?
EMUL-8 is a fascinating programming language. It's described in just one paper from 1977. It's a mix of features from APL, LISP, ALGOL, and SNOBOL. And, I think, it's a wonderful window into how counterculture and home computing collided.
Episode 184 - What Is A Programming Language?
I mean that both in the specific and the abstract. This episode we are looking at APL, which stands for A Programming Language. APL was developed in the mid 50s, but didn't see a working implementation until 1965. It's a language that truly looks like no others, but has some odd parallels to everything from BASIC to LISP to linear algebra. Learn APL at: tryapl.org https://www.jsof
Dale Biagio - Hello, World!
Dale Biagio(author of Hello, World!) got in touch with me recently. He said he had a book full of short histories of programming languages. Better still, it has sources! How could I resist! In this episode I sit down with Dale to talk about the intersection of technical and human histories. You can find more about Hello, World! at Dale's website: https://helloworldthebook.com/
Episode 183 - A Digital Gap?
I've been browsing old compur surveys and trying to build up a comprehensive data set. What I've found is a little surprising: between late 1945 and 1949 only 10 new computers entered service. Once we get to the 50s that number explodes. What's going on here? What caused the gap between the first digital machines and the explosion of computers in the 50s? In this episode I try to answer that quest
Episode 182 - Spinning Memories
What connects IBM, the NSA, the Third Reich, and high fidelity recordings of symphonies? The answer is: magnetic drum memory. Join me as I lose all track of scope and plot to discovery just how and why magnetic drum memory was invented. Like Advent of Computing? Then check out the after show! Adjunct of Computing is now LIVE: YouTube Spotify Apple Podcasts
Episode 181 - RAYDAC
In 1947 Raytheon signed a contract to make their first computer. It would be their last... at least for many many years. The fruits of this contract was RAYDAC. Early digital computers were odd, to say the least. And RAYDAC distinguishes itself. From zig-zag delay lines to hunting tapes to freon cooling, it truly is a unique machine. Selected Sources: https://ed-thelen.org/McGee_Book-4.2.2.pdf - M
Episode 180 - You Wouldn't Magnetize a Tape!
The image of a mainframe is almost always accompanied by it's companion: the magnetic tape drive. For decades magnetic tape served as the medium of choice for computing. It was faster than punch cards, and more available than hard drives. But where did it come from? Is it a borrowed technology like the vacuum tube? Like Advent of Computing? Then check out the after show! Adjunct of Computing is no
Episode 179 - Programming Block by Block
In which we discuss GPSS: the General Purpose Simulation Language. As for as languages go, this is a unique one. It's designed for certain types of simulations. It's code is just a handy way to feed a flowchart into a computer. It's design is closer to an analog computer than it is to a programming language. Yet GPSS is Turing Complete. Step inside and prepare to be... confused! The big source of
Episode 178 - The Programma 101
The Olivetti Programma 101 isn't quite like any other machine. On first glance it looks like a big desktop calculator. Inside, it's a purebred computer... but strange one. It uses twisted spring steel for memory, has no addresses, and it's machine code looks more like a spell than a program. It's existence is due, in no small part, to a man being very mean to GE engineers. Like Advent of Computing
Dan Temkin - Forty-Four Esolangs
Dan Temkin has been a long time friend of the show. I finally got the chance to sit down and talk with him about one of his latest projects. Forty-Four Esolangs is a "The first artist's monograph of programming languages". During this interview we keep circling around one very crucial question: what really is a programming language? Get the book and learn more about esolangs here: https://dan
Episode 177 - Getting Real with RSX
Who wants to hear me make incorrect assumptions about old software? RSX is a system that, from the outside, can sound like it has a similar story to that of UNIX. First developed for the PDP-15 in 1969, RSX becomes much more well known when it migrates to the PDP-11. It becomes a multitasking and multiuser system. A key difference is niche. While UNIX is a very general purpose system RSX is built
Episode 176 - Is That Even UNIX?
UNIX is beloved by many. It's the classic minicomputer operating system. It's big, it's powerful, it's multitasking, and it has some very specific memory requirements. So what happens when you try and get UNIX to run on a microcomputer? Hilarity ensues. Today we are looking at 3 small versions of UNIX: OMNIX, LSX, and CROMIX. And, I'll tell you, one of these is closer to vaporware than the others.
Episode 175 - SNOBOL? That's Disgusting!
Today we are talking about one of the most unique languages I've ever come across. SNOBOL emerges from the early days of programming. It's first compiler is implemented on the back of an envelope. It only has one data type, and only one format for every line of code. It's the bane of Chester, and center of an office drama! What's not to love? Selected sources: https://dl.acm.org/doi/epdf/10.1145/9
Episode 174 - The Bell Model I
We are getting back to the actual digital family tree. In 1937 George Stibitz built a tiny binary adding circuit on his kitchen table using scraps he "liberated" from his job at Bell Labs. In 1940 he demonstrated a machine he called a computer. That research forms one of the foundations of modern computing. It also forms a weird temporal phenomenon that I have yet to name. Maybe the Curse of '37?
Episode 173 - Hybrid Programming
Hybrid computers are composed of a digital computer linked to an analog computer. That leads to an interesting challenge: how do you write software for one of these things? The analog side actively resists programming, while the digital side can't comprehend of continuous values. In the 1960s specialized languages appeared that tried to bridge this divide. And, I assure you, they are not at all li
Episode 172 - Analog/Hybrid
In 1945 the first electronic digital computers sparked to life. Number crunching was instantly changed forever! The perfect technology had arrived, and there was never even a competition, right? Well, not so much. The simple fact is that computers sucked for decades. Digital machines have all kinds of inherent pitfalls. There was another entire lineage of computers that existed in the shado
Episode 171 - What Is a 4GL?
Last episode I said that Fourth Generation Languages were a topic for another time. Well... this counts as another time. Today we are trying to figure out what exactly makes a language 4th Generation. Along the way we will see why the term bugs me so much, why 4GLs seem so strange, and how a programmer can increase their productivity by 2,000% (some restrictions apply).
Episode 170 - Thoroughbred/OS
I'm back to normal episodes, and I'm running out the gate with a weird one. Thoroughbred/OS was a multi-user and multi-tasking operating system for the IBM PC. It's mian interface was... BASIC of all things! What exactly is this oddity? https://winworldpc.com/product/thoroughbred-os/662 - Try Out Thoroughbred/OS yourself
Episode 169.5 - Ben Zotto and the Story of Sphere Computers
I recently had the chance to talk to Ben Zotto about his upcoming book: Go Computer Now! - The Story of Sphere Computers. It's all about an obscure machine powered by the Motorola 6800 that released in 1975. I figured it was the perfect faire for my audience. And... I really want to read this book! You can back the project over at kickstarter: http://kickstarter.com/projects/bzotto/go-computer-now
Episode 169 - Dellinger's Viruses
In 1981 Joe Dellinger attempted to create the perfect computer program: a virus that spread silently. In 1982 a revision of that virus broke containment. It would have remained completely hidden if it wasn't for an obscure Apple II game. Today we look at the story and motivation behind that virus, and how it slipped into the sands of time. Or... did it!? The truth is if you have an Apple II
Episode 168 - Halt and Catch Fire
Imagine a secret number that could be used to bring your computer to a screeching halt. In 1977 Gerry Wheeler discovered an interesting feature of Motorola's new 6800 microprocessor. There was a secret instruction that, if read, would cause the processor to stop working. He called this magic number Halt and Catch Fire, or HCF, and wrote a neat article about the operation. This was the first
Episode 167 - The Tape That Unwound Itself
Have you ever had a computer do something you can't explain? Have you ever thought a machine had a mind of its own? In 1971 Met Life was faced with this exact conundrum. Their tape drives, for some reason, were throwing tape all over the floor every night. Systems were checked and no flaws were found, but every morning an operator would walk in on an absolute mess. What could make a healthy
Episode 166 - Beyond the PDP-11
My trilogy on the PDP-11 concludes with a look at the far flung places this computer can take us. In this episode we look at some issues with claims of the PDP-11's linage, smuggling, Hungarian-made microcode, and much more. Along the way we answer the question: if the PDP-11 was such a good design then where was it during the home computing boom of the 80s?
Episode 165 - LSI-11
This episode we continue my series on the PDP-11 by examining how DEC adapted to the advent of the microprocessor. Along the way we will see how the PDP-11 inspired new generations of computers, and the surprising connection to early digital hobbyists.
Episode 164 - LGP-30 LIVE! from VCF West
Last weekend I had the chance to talk about the LGP-30 and my emulation project at VCF West in Mountain View, CA. The showrunners will be posting a full video later, but that takes a while to go live. In the meantime, here's the audio I siphoned off the sound board and my slide deck. View my slides here: https://drive.google.com/file/d/1E9-B3EzxudFWX0yJMevbbIkD2qRbBKWi/view?usp=sharing View the e
Episode 163 - Ever Heard of the PDP-11?
The DEC PDP-11 is one of the most influential minicomputers of all time. Some would even call it the most influential computer of all time. But where exactly did it come from? How was it designed? This episode is the start of a 3 part series that will look at how the PDP-11 was created, adapted to changes, and the strange places it ended up.
Episode 162 - CSIRAC, Australia's First Computer
In 1949 CSIRAC sprung to life in a lab in Sydney, Australia. It was a very early stored program computer. All machines of the era were unique. But CSIRAC, well, it was very unique indeed. Selected Sources: https://cis.unimelb.edu.au/about/csirac/music/reconstruction - The Music of CSIRAC https://sci-hub.se/10.1109/MAHC.1984.10014 - Pearcy and Beard on CSIRAC
Episode 161 - The IAS Machine
The first batch of digital computers emerge directly following WWII. The hallmark of this generation is uniqueness: no two computers are the same. However, there is a machine that bucks that trend. The IAS Machine, built in Princeton in the late 1940s, served as the inspiration for at least a dozen later computers. But how similar were these Princeton-class computers? What exactly was so special a
Episode 160 - What can Lunar Lander tell us about FOCAL?
Lunar Lander is one of the best loves video games of all time. The game was created in 1969 as an homage to the recent Apollo 11. From there it would only spread. Just about anything that can print text has it's own version of Lunar Lander. The early history of this game is mixed up with something weird: two nearly identical programming languages. Today we will be using the history of Lunar Lander
Episode 159 - The Intel 286: A Legacy Trap
In 1982 Intel released the iAPX 286. It's was the first heir to the smash-hit 8086. But the 286 was developed before the IBM PC put an Intel chip on every desk. It's design isn't influence by the PC. Rather, it reaches further into the past. Today we are looking at the strange melding of old technology, new ideas, and compatibility that lead to the 286.
Episode 158 - INTERCAL RIDES AGAIN - Restoring a Lost Compiler
In 1973 the world caught it's first glimpse of INTERCAL. It's a wild and wacky language, somewhere between comedy and cutting satire. But the compiler was never circulated. There would be later implementations, but that original compiler remained lost to time. That is, until now. This episode covers how the original source code was found, and my attempt to get it up and running. Get the source cod
Episode 157 - Only S1 Users Will Survive!
The S1 operating system can do it all! It can run on any computer, read any disk, and execute any software. It can be UNIX compatible, DOS compatible, and so, so much more! But... can S1 ship? Today we are talking about an operating system that sounds too good to be true. Is it another example of vaporware? Or is S1 really the world's most sophisticated operating system?
Episode 156 - RPG, a Different Paradigm?
How do you make a computer act less like a computer? It sounds like some kind of riddle, but in the early 1960s it was an actual problem. As IBM customers transitioned from tabulators to computers they ran into all sorts of practical issues. Programmers became a hot commodity. But how do you find a programmer in 1959? And how can you even afford such a luxury? Wouldn't it be better if you could ju
Episode 155 - LINC
In the early 1960s a neat little machine came out of MIT. Well, kind of MIT. The machine was called LINC. It was small, flexible, and designed to live in laboratories. Some have called it the first personal computer. But, is that true? Does it have some secret that will unseat my beloved LGP-30? And how does DEC fit into the picture?
Episode 154 - ACTing Up
The LGP-30 is one of my favorite computers. It's small, scrappy, strange, and wonderous. Among its many wonders are two obscure languages: ACT-I and ACT-III. In this episode we are exploring the ACTS, how the LGP-30 was programmed in practice, and why I've been losing sleep for the last few weeks.
Episode 153 - The Keypact Mystery
When I was down at VCF SoCal I ran into a strange machine: the Keypact Micro-VIP. It's a terminal without a keyboard, covered in dials, with a speaker and a switch labeled "voice". This chance encounter with the unknown sent me down a wild path. It involved the creeping spread of computing, chicken feed, door to door life insurance salesmen, and at least one early hacker.
Episode 152 - LIVE at VCF - Reviving Retro Panel
A special treat from VCF SoCal. While visiting I had the chance to host a panel on restoration and preservation. I was joined by: David from Usagi Electric (https://www.youtube.com/@UsagiElectric) Rob from Souther Amis (https://www.southernamis.com/) Jim, Former Executive Director Computer Museum of America (https://computerhalloffame.org/home/about/)
Episode 151 - The Friden Flexowriter
Have you ever looked at an old computer and seen a weird typewriter thing tacked on? In most cases that's a device called a Flexowriter. It's half electric typewriter, half teleprinter, half tape reader, and all business! This episode we are chronicling the rise, fall, and weird business dealings of the Flexowriter.
Episode 150 - Starting Windows Up
In the modern day Windows is a power house, but that wasn't always the case. In this episode we are looking at the fraught development of Windows 1.0. During development it was called vaporware, it was panned in the press, roasted at at least one trade show, and even called... "eclectic". Through it all a vision in lime green would take form.
Episode 149 - IDRIS Is Not UNIX
This episode we are taking a trip back to UNIX world. We're looking at IDRIS, the first clone of UNIX. It was supposed to be highly compatible, but use no code from Bell Labs. IDRIS ran on everything from the Intel 8080 up to the IBM System/370. There was even a version that could run MS-DOS programs. Sound too good to be true? Well, that may be the case. Selected Sources: https://archive.org/deta
Episode 148 - Is BLISS Ignorance?
In 1970 a little language called BLISS emerged from Carnegie Mellon University. It was a systems language, meant for operating systems and compilers. It was designed, in part, as a response to Dijkstra's famous Go To Considered Harmful paper. It had no data types. It used the most bizzare form of the pointer I've ever seen. And it was a direct competitor to C. Sound interesting, yet? Selected Sour
Episode 147 - Molecular Electronic Computer
In 1961 Texas Instruments unveiled the Molecular Electronic Computer, aka: Mol-E-Com. It was a machine that fit in the palm of your hand, but had all the power of a much larger computer. This was in an age of hefty machines, which made the achievement all the more marvelous. How was this even possible? It was all thanks to the wonders of molecular electronics, and a boat load of funding from the U
Episode 146 - The Z4
The Z4, completed by Konrad Zuse in 1945, is a computer with a wild story. It was made from scrounged parts, survived years of bombing raids, moved all around Berlin, and eventually took refuge in basements and stables. In this episode we will follow the Z4's early days, and look at how it fits into the larger picture of Zuse's work. Along the way there is looting, rumors, and even... IBM! Selecte
Episode 145 - Zuse's Mysterious Machines
In 1933 Konrad Zuse, a German civil engineer, caught the computing bug. It would consume the rest of his life. According Zuse he invented the world's first digital computer during WWII, working in near total isolation within the Third Reich. How true is this claim? Today we are looking at Zuse's early machines, the Z1, Z2, and Z3. Selected Sources: The Computer -- My Life, by Konrad Zuse https://a
Episode 144 - RABBITS
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Episode 143 - The Haunted Hard Drive
Have you ever felt like a computer just refuses to work? Like a machine has a mind of it's own? In 1970 a hard drive at the National Farmers Union Corp. office decided to do just that. That year it started crashing for apparently no reason. It would take 2 years and 56 crashes to sort out the problem. The ultimate solution would leave more questions than answers. Was the hard drive haunted? Or was
Episode 142 - OS and JEDGAR
This time we are diving back into the Jargon File to take a look at some hacker folklore. Back in the day hackers at MIT spent their time spying on one another's terminals. That is, until some intrepid programmer found a way to fight back. Selected Sources: http://www.catb.org/esr/jargon/html/os-and-jedgar.html - OS and JEDGAR https://github.com/PDP-10/its - ITS restoration project
Episode 141 - Computer Ruins Grocer
In 1962 Food Center Wholesale Grocers Inc installed a new IBM 305 RAMAC. That's when things started to go wrong. The faulty machine seemed to have a mind of it's own, and would spread chaos to grocery stores all around Boston. Selected Sources: https://archive.org/details/computerinsecuri0000norm - Computer Insecurity https://bitsavers.computerhistory.org/magazines/Computers_And_Automation/196805
Episode 140 - Assembling Code
Programming, as a practice and study, has been steadily evolving for the past 70 or so years. Over the languages have become more sophisticated and user friendly. New tools have been developed that make programming easier and better. But what was that first step? When exactly did programmers start trying to improve their lot in life? It probably all started with assembly language. Well, probably…
Episode 139 - HUTSPIEL
The early history of computer games is messy, weird, and surprising. This episode we are looking at HUTSPIEL, perhaps one of the oldest games ever played on a computer. It's a wargame developed to simulate nuclear conflict... and it's 100% analog. Join us as we find out just what tax dollars were being used for in 1955. Selected Sources: https://archive.org/details/hutspiel-a-theater-war-game - Th
Episode 138 - Type-It-Yourself
I'm finally back to my usual programming! This time we are taking one of my patent pending rambles through a topics. Today's victim: the humble type-in program. Along the way we will see how traditions formed around early type-in software, and how the practice shifted over time. Was this just a handy way to distribute code? Was this just an educational trick? The answers are more complex than you
Episode 137 - Edge Notched LIVE
LIVE from VCF West 2024, my talk on edge notched cards! Since this is a live recording from an auditorium the audio is a little boomy, so be warned. Actually, I'm pretty sure this is the same space that CHM uses for some of their oral histories. What I have today is just the audio component. VCF will be posting a full video eventually, which I'll be sure to pass around.
Episode 136.5 - Data Center Disaster
I've gotten busy preparing for VCF West, so this time you get a short one! In this byte-sized episode we are looking at a short and strange story: that time a plane struck a software company, and the company turned around and used the crash in their own ads.
Episode 136 - Getting On TRAC
Have you ever formed a bad first impression? Way back when I formed a hasty impression of this language called TRAC. It's been called a proto-esoteric language, and for good reason. It's outlandish, complex, and confounding. But, after the urging of some listeners, I've decided to give TRAC a second look. What I've found is, perhaps, more confusing than I ever imagined. This episode we are looking
Episode 135 - XENIX
In 1984 SCO released PC XENIX, a port of UNIX that ran on an IBM PC. To understand why that's such a technical feat, and how we even got here, we have to go back to the late 1970s. In this episode we are taking a look at how Microsoft got into the UNIX game, and how they repeatedly struggled to make micro-UNIX work for them. Along the way we run into vaporware, conspiracy, and the expected missing
Episode 134 - Beyond the Punch
This episode I'm opening up my research vault to present some interesting pre-digital technology. Back before computers us humans used to write everything down on paper. Over time that lead to some organizational issues. By 1890 punch cards show up to solve one aspect of this problem, but that technology had it's limitations. We will be looking at other paper-based approaches to data management, a
Episode 133 - LIVE from Intelligent Speech 2023
I'm currently out traveling. Due to my poor planning I managed to score back to back trips, for both business and leisure. While I'm not able to get an episode out on time, I do have a replacement! In 2023 I was invited to speak at the Intelligent Speech conference. So, today, I present the audio of that talk. The topic is, of course, the wild path of the Intel 8086's creation and rise to power! I
Episode 132 - The PDP-1
In 1959 the world bore witness to a new type of computer: the PDP-1. It was the first interactive computer to really make a dent in the market. Some say it was the first minicomputer: a totally new class of machine. But where did this computer come from, and what made it so different from the rest of the digital pack? Selected sources: https://americanhistory.si.edu/comphist/olsen.html - Smithsoni
Episode 131 - Computer... Books?
I've been feeling like rambling, so it's time for a classic ramble. This time we are looking at the origins of books about computers. More specifically, computer books targeted at a general audience. Along the way we stumble into the first public disclosure of digital computers, the first intentionally unimportant machine, and wild speculation about the future of mechanical brains. No sources list
Episode 130 - ALGOL, Part II
This is a hefty one. I usually try to keep things as accessible as possible, but this time we have to get a little more technical than usual. We are picking up in 1964, with the first proposals for a new version of ALGOL. From there we sail through the fraught waters of ALGOL X, Y, W, and finally 68. Along the way we see how a language evolves over time, and how people and politics mesh with techn
Episode 129 - ALGOL, Part I
ALGOL is one of those topics that's haunted the show for a while. It comes up any time we talk about programming languages, and with good reason. Many of the features and ideas found in modern languages have their roots in ALGOL. Despite that influence, ALGOL itself remains somewhat obscure. It never reached the highs of a C or LISP. In this series we are going to look at ALGOL from 1958 all up to
Episode 128 - Cryotrons LIVE!
Originally presented at VCF SoCal in February of 2024. The cryotron, a superconductive switch, almost revolutionized computing. It's one of those fascinating near misses. In this episode we are talking about the history of the cryotron, how the NSA and supercomputing factors into the mix, and the current state of research into the topic. Did the NSA actually construct a supercomputer that ran in a
Episode 127 - Nim
This is going to be a wild rambling ride. In 1939 a computer called Nimatron was made. It was one of the earliest digital electronic computers in the world. It did one thing: play a game called Nim. Over a decade later, in 1951, another Nim machine hit the scene. This computer called Nimrod, was designed to demonstrate how computers worked... by playing a game of Nim. These machines, humble as
Episode 126 - IBM Compatible (No, Not Those)
This episode wraps up the System/360 trilogy by taking things back to where they started for me. We will be looking at System/360 clones, how they could exist, why they existed, and why IBM didn't crush them. We close with a discussion of how these earlier clones impact our understanding of the IBM PC story. The truth is, by 1981 IBM was no stranger to clones. This is the culmination of a wild st
Episode 125 - US v IBM
My coverage of the IBM System/360 continues! In this episode we look at US v IBM, and the fallout that surrounded the release of the System/360. By 1969 IBM already had a history of antitrust litigation. What was IBM doing to upset the Department of Justice, and how does it tie in to the larger story of clone computers? Selected Sources: http://www.cptech.org/at/ibm/ibm1956cd.html - 19
VCF SoCal - Interview with Micki and Steve
In this episode I sit down and talk with Micki and Steve about VCF SoCal, a new Vintage Computer Festival! The event is taking place in Orange, California on Febuary 16th and 17th. VCFs are a wonderful time, and a great opportunity to meet up with other retro enthusiasts. The weekend will be filled with exhibits and speakers, including myself! I will be in attendence, and talking about some super
Episode 124 - The Full 360
The release of the IBM System/360 represents a major milestone in the history of computing. In 1964 IBM announced the 360 as the first family of compatible computers. Users could choose a system that was just the right size for their needs, mix and match peripherals, and have no fear of future upgrades. If you started on a low-end 360 you could move up to a top of the line model and keep all your
Episode 123 - The Jupiter Ace
Released in 1982, the Jupiter Ace is a fascinating little computer. It's hardware isn't much to write home about. It's just an 8-bit microcomputer very much in line with other systems of the era. Where it shines is it's software. In a period when most home computer ran some version of BASIC the Ace was using Forth. On the surface that might sound like a trivial difference, but that one deviation
Episode 122 - To Edit Text
Tools are the most important programs in the world. Without quality tools it's impossible to write quality software. One of those most important of those tools, and the most hotly coveted, is the text editor. These programs offer us a window into the digital world. It's no wonder that programmers the world over basically live inside text editors. In this episode will discuss when exactly that d
Episode 121 - Arguments Against Programming
Most accounts of the early history of programming languages all share something in common. They all have a sentence or two explaining how there was great resistance to these new languages, but eventually all programmers were won over. Progress was made, despite the forces of counterrevolutionaries. What you won't find in most histories are the actual arguments these counterrevolutionaries made.
Episode 120 - Simply COSMAC
Have you ever opined for a simpler time? Have you ever wanted a computer that you can understand all the way down to the silicon? Then RCA's COSMAC might be the architecture for you! COSMAC was a simplified computer architecture designed in the early 70s. It's tiny, cheap, and built to be easy to understand. But is the chip actually useful? Selected Sources: https://archive.org/details/m
Episode 119 - The Batch!
This episode we are looking at a ghost of bygone days: batch processing! Before fancy terminals peppered computer rooms, before there was a microcomputer on every desk, there was the batch. In this non-interactive form of computing a user could wait hours, days, or even weeks to get a chance at computer time. Machines were kept well away from programmers, guarded by digital clerics. Why did such
Episode 118 - Viral Dark Ages
It's finally Spook Month here on Advent of Computing! To kick things off I'm tackling a bit of a mystery. Between 1972 and 1982 there is only one well documented virus. This period is book ended with plenty of sources and, yes, even viruses. But this decade long span of time has almost nothing! Was this era truly safe from the grips of malicious code? Or is there a secret history lurking just ben
Episode 117 - What's in a Byte?
Byte has to be one of the most recognizable parts of the digital lexicon. It's an incantation that can be recognized by even the uninitiated. But where does the byte come from? Has it always existed, or did it more recently come into being? And, more specifically, why is a byte 8 bits? Is it some holdover from long ago, or is there some iron clad rule of 8's? Selected Sources: https://ar
Episode 116 - Monte Carlo
It's finally time! In this episode we are looking at the Monte Carlo method, perhaps the first practical computer program that could outpace human capability. The best part: the method relies on a random walk to reach a statistically valid answer! Selected Sources: https://www.osti.gov/servlets/purl/10596 - Igniting the Light Elements https://library.lanl.gov/cgi-bin/getfile?003268
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Back to the 80s Radio
