Advent of Computing
Technology
About
Welcome to Advent of Computing, the show that talks about the shocking, intriguing, and all too often relevant history of computing. A lot of little things we take for granted today have rich stories behind their creation, in each episode we will learn how older tech has lead to our modern world.
Episodes
- 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. Li…
- Episode 181 - RAYDAC
Episode 181 of Advent of Computing discusses RAYDAC, Raytheon's first and ultimately last computer for many years, developed under a 1947 contract. The episode highlights RAYDAC's unique features such as zig-zag delay lines, hunting tapes,…
- Episode 180 - You Wouldn't Magnetize a Tape!
This episode discusses the historical significance of magnetic tape drives in computing, detailing their rise as a primary storage medium due to speed and availability advantages over punch cards and early hard drives.
- Episode 179 - Programming Block by Block
This episode of Advent of Computing discusses GPSS, the General Purpose Simulation Language, noting its unique design for specific simulations and its flowchart-like code structure. Despite its differences from traditional programming lang…
- Episode 178 - The Programma 101
The Olivetti Programma 101 is examined as a unique computer resembling a desktop calculator, featuring spring steel memory, no addresses, and distinctive machine code. Its development involved an anecdote concerning GE engineers.
- Dan Temkin - Forty-Four Esolangs
The Advent of Computing podcast features a conversation with Dan Temkin about his project "Forty-Four Esolangs," which is described as the first artist's monograph of programming languages. The discussion centers on defining what a program…
- 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 whe…
- 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? Hi…
- 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 fo…
- 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 comp…
- 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 si…
- 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 c…
- 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…
- 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? ht…
- 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 fa…
- 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. T…
- 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 caus…
- 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 f…
- 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…
- 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 digit…
- 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 si…
- 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 seri…
- 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/…
- 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 th…
- 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…
- 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 pas…
- 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 r…
- 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…
- 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 issue…
- 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? Doe…
- 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 pract…
- 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…
- 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.south…
- 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 a…
- 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 le…
- 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 Syste…
- 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 pap…
- 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…
- 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…
- 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 Reic…
- 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…
- 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.…
- 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 Sou…
- 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 w…
- 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%…
- 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,…
- 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 hist…
- 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 cras…
- 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…