# Code Monkey Have Fun

Posts
• #### Chuck Moore's Creations

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This is the beginning of a series: Programming the F18 Beautiful Simplicity of colorForth Multiply-step Instruction Simple Variables When I heard that Chuck Moore was speaking at Strange Loop this year I just had to go. His talk yesterday...
• #### The Beautiful Simplicity of colorForth

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colorForth As much fun as hand packing instructions was in the last post , that was tedious. Let's move on to colorForth. Don't worry too much about what the code above does (prints "colorForth rocks!"). It compiles to this: Isn't the source...
• #### Programming is “Pointless”

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Some may call it “pointless”, but I absolutely love the point-free tacit programming style . The level of brevity can be truly astounding! Some of the terseness comes from not having to mention parameter names all over the place and much of...
• #### The Lambda Calculus

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Mads Torgersen’s post the other day was very cool! The first time I really understood Lambda Calculus was from this little 8-page paper . Relating it to Scheme made it stick for me. After reading Dr. T’s post I was just now having some fun playing with...
• #### Notch is Gonna Outdo Himself!

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[Note: I/O has now been added ] My son is completely obsessed with Minecraft . It’s an amazing game and the way he plays it, it really nurtures extreme creativity. I honestly haven’t been able to get into it myself but I was pretty intrigued by the ComputerCraft...
• #### Programming the F18

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Programming the F18 As we saw in the last post , the GA144 chip is an array of 144 tiny computers or "nodes". We tend not to call them "cores" because they are really more independent than that. Programming these interconnected nodes is something like...
• #### FScheme - Scheme in F#

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[Part 1 of the FScheme series ] One of my New Year’s goals is to re-read Lisp in Small Pieces and implement all 11 interpreters and 2 compilers. As much as I like the "Lisp in Lisp" idea and enjoyed the eureka moment in SICP when Sussman writes...
• #### Microcode-level HP-35 Emulator (in JavaScript!)

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[Part 1 of the HP Calc series ] I recently started a super-geeky side hobby of collecting vintage calculators and got my hands on a pair of HP calcs. The more I learned about the internals of the devices, the more intrigued I was. Jacques Laporte...
• #### FORTH LOVE? IF HONK THEN

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[The first in a series of posts on the evolution of TransForth ] I’ve been enthralled by retro computing recently and have been filling my bookshelf [yes, actual bound paper books] with (nearly) extinct programming language topics: Lisp, Fortran...
• #### Multiply-step Instruction

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Fourth in a series on colorForth and GreenArrays hardware . This time, how the multiply-step instruction works on the F18. Bit Twiddling is Fun! Here's a bit-twiddly interview question for you: Design an algorithm to multiply fixnum integers in...
• #### 96 Line F# Emulator + 960 bytes of HP-35 Microcode

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[Part 3 of the HP Calc series ] In this post, we’ll create a 96-line F# emulator for the HP-35 calculator with which we’ll run the 960 byte (!) ROM image. As you may well know, I am a calculator freak. The 40-year-old HP-35 is an especially...
• #### Lego KinNXT

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I’ve been having some fun playing with the Kinect SDK and the Lego NXT kit . The protocol to talk to the Lego brick over Bluetooth is pretty straight forward. Below is a little F# module for most of the basic commands. I’ll fill out the full set soon...
• #### Recursion Is The New Iteration

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I remember the strange feeling as a kid the first time I saw structured BASIC after having been doing everything with line numbers. Any time I happened to walk into a Radio Shack in the early 80s I’d just have to leave this behind:   I was in a GOTO...
• #### The Humans Are Dead

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Sadly, Microsoft has decided to kill the MSR Robotics team... My last day is today. All that remains is a bunch of robots... Since this is an MSDN blog, I believe it will have to continue somewhere else. I don't know where yet, but follow me on Twitter...
• #### Turtle Graphics on the Fignition

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The Fignition board is a fun little piece of 8-bit fun I tell ya! I’ve been having a blast with it. It’s an ATmega168 with 8Kb SRAM and 4Mbits of flash with video out (there’s also a sound mod for it ). In this post I want to show off...
• #### Memoization

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Don Syme blogged this quite some years ago but it just came up in a design review on my team this afternoon and it bears repeating. let memoize f = let cache = new Dictionary <_,_> () ( fun x -> match cache.TryGetValue x with | true , res...
• #### Turning Your Brain Inside Out with Continuations

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[Part 10 of the FScheme series ] We’re into one of the most magical chapters in Bill Hails’ book . We’re about to add a very strange and dangerous feature to the interpreter: ‘call/cc’ (“call with current continuation”...
• #### : LOOPTY DO I . LOOP ;

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[The sixth in a series of posts on the evolution of TransForth ] There’s beginning to be more Forth than F# in these posts! The last major piece we’re missing in the language, aside from some compile-time trickery we’ll get into later...
• #### Fixing Decades-old Bugs in the HP-35

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[Part 2 of the HP Calc series ] Making the JavaScript-based HP-35 microcode emulator has been a fun little project. Last time we disassembled the original bits from the ROM. I say “disassemble” but really our microcode instructions were...
• #### Programming a 2000 Year Old Sandstone Computer

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[The eleventh in a series of posts on the evolution of TransForth ] If you think coding with punch cards is old school, you should try using sandstone tablets! Legend has it that members of the Cult of the Bound Variable designed and may have even...
• #### Bowling Kata

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Our team’s been doing Katas to get the hang of TDD. One such kata ( calculating bowling scores ) struck me as insanely simple with pattern matching in F#: let rec score acc = function | 10 :: (a :: b :: _ as t) -> score (acc + 10 + a + b)...
• #### Meta-Circular Chicken and Egg

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[The tenth in a series of posts on the evolution of TransForth ] This post may not quite be deserving of a wizard’s cape and 2001 Space Odyssey background music as when Sussman writes out Lisp in Lisp (at 34:34 - my absolute favorite SICP lecture...
• #### Future of Computing

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[I wrote this almost 14 years ago (20 FEB 1996. Today is 27 SEP 2009). Some of it is embarrassingly naïve, but I was just a (25 year old) punk kid back then. I was quite the anti-Microsoft/Intel, Java-head back then. It’s funny that despite...
• #### Turtles All The Way Down

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What do you think this “code” does? 0(1adf89r)720x Well, it’s a ridiculously terse, stack-based Logo-like language with single character commands. Beginning with 0, it repeatedly (720 times) increments the top stack value and moves forward by that amount...
• #### Heart Transplant

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[The eighth in a series of posts on the evolution of TransForth ] They say that the inner interpreter is the heart of Forth and outer interpreter is the soul. It’s time to give TransForth a heart transplant! To really understand what we’re...
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