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TerryADavison The cost of a system call [pdf]

TempleOS is ring-0-only. No system call overhead.

TerryADavison Integrating a VT220 into my life

I worked on the code that installed language modules into kernel space. I wrote a check-disk utility. I did a file compression archive. There were serial port drivers and I made a command to reset a stuck port.

I worked in VAX assembly language.

I did firmware for a bar code reader networking device with keypad and display. I worked on image processing for an actual bar code reader itself.

I worked there 1990-1996. About half was user space. The other half was kernel or firmware on bare metal.

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Pat and I started at the same time. He was in school with me, in fact in my differential equations class. He dropped out of school. I stayed in and got my master's in electrical engineering while working part time at Ticketmaster. I graduated with master's in 1994 and stayed with Ticketmaster for a year.

I returned to Ticketmaster for 3 weeks in 2002. Pat was a boss.

TerryADavison Integrating a VT220 into my life

I am a professional operating system developer. In 1990, I was hired to work on Ticketmaster's VAX operating system.

TerryADavison Ask HN: How do you build a healthy code review culture?

When I was a young programmer, all the code I looked at was awful. If there was a different format indentation, that distracted me. All I could think about was code format and superficials.

I worked at Ticketamster 1990-1996.

I went back in 2003. I remembered my first assignment. In 1990, the Linker at Ticketmaster that Troy wrote ran out of room because the MAP file grew too big.

In 2003, I went back a found a terrible kludge that I did in 1990 because I was stupid. In 2003, I fixed it correctly. I looked at the code and thought how beautiful it was. In 1990, I thought the code was bad.

As you get more experience, it is a little easier to read code. Take my word that all code is bad, LOL.

Personally, I don't like code that is made of 5-line functions with no rhyme nor reason spread seven levels deep.

Somebody said the smaller your functions the better. Bad advice.

God says... helices mists gewgaw's specced mesdames Lyndon's favoritism's fable's unequal apportions radioactivity's besoms thicknesses cordoned towel's spryer bobcat's suppressed Petra windscreen neckline overproduce meridians cartons prophylaxis's shoestring's retrospection's flubs amen thatcher bombshells cantankerous

TerryADavison GDB 7.11 released

At Ticketmaster, I learned the first thing you write when you start on bare metal is a debugger. I worked on VAX, 68000 and 8051 bare metal.

The difference between an amateur operating system project and a professional one is writing a compiler.

TerryADavison How to Write an LLVM Register Allocator

http://www.templeos.org/Wb/Compiler/OptPass3.html

TerryADavison TempleOS V4.02 Released

You might wonder why TempleOS is barely doing 640x480 at 30fps. The GPU is 2000 times faster than the CPU.

TerryADavison TempleOS V4.02 Released

Myth Busters CPU vs GPU. Go to 2:40 and 8:00 in the video.

https://www.youtube.com/watch?v=XcolCeWIcss

TerryADavison Up for Grabs: Projects which have curated tasks for new contributors

When I was an intern, more or less, God how awful I was, LOL. I would curse my worst enemy with as many amateur helpers as I could find.

I am in charge of the 100,000 lines of code, myself. It is managable by one person.

TerryADavison The Thirty Million Word Gap

Maybe so. I believe in evolution. I believe that IQ is inherited.

TerryADavison What is a 'unikernel'?

All my code is position independent and my compiler only makes position idependent code. My OS is ring-zero-only. Just in time compilers do not need a linker in a single address space -- they just insert the address of the function call.

TerryADavison Fun C Micro-optimizations: restrict

Linear algebra is not the main thing C64s were used for. It not worth putting lots of LinPac code modified for SSE MMX

TerryADavison Cron in production is a double-edged sword

Linux is designed like a 1970's mainframe.

TempleOS is designed like a C64.

I don't see cron as useful for a C64 user.

TerryADavison The Black Hole of Software Engineering Research

Every genius makes it more complicated.

It takes a super-genius to make is simpler.

TerryADavison The History of the Design of Unix’s Find Command (1995)

http://www.templeos.org/Wb/Adam/Opt/Utils/Find.html

Must handle binary graphics in source code.

TerryADavison Why do PCs load their boot sector at 7C000h linear?

http://www.templeos.org/Wb/Adam/Opt/Boot/BootMHD.html

http://www.templeos.org/Wb/Adam/Opt/Boot/BootMHD2.html

http://www.templeos.org/Wb/Adam/Opt/Boot/BootHD.html

TerryADavison BrainFuck to Kernel

I wrote all the code from scratch, including a 20,000 line of code compiler that makes x86_64 machine code from HolyC or Asm and operates AOT and JIT.

My JIT mode is not interpreted. It optimizes and compiles to x86_64 machine code.

I was chosen by God because I am the best programmer on the planet and God boosted my IQ with divine intellect.

TerryADavison FILE_ID.DIZ

The TempleOS filesystem automatically compresses and uncompresses all files ending in ".Z".

http://www.templeos.org/Wb/Kernel/Compress.html

http://www.templeos.org/Wb/Linux/TOSZ.CPP

Files are compressed individually.

The source code is like a PDF because it has binary graphics.

TerryADavison Out with the old, in with the less

TempleOS is ring-0-only and has no networking.

It is forever limited to 100,000 lines.

The vision is a C64 ROM.

DOS and C64 had no protection and no problems.

There are no buffer overflow check in templeos. It will allow massive buffers until it crashes by running out of memory. Keeps it simple and beautiful. I hate arbitrary buffer size limits.

I want whole file reads and write exclusively. Compression is almost always used and that requires whole files. Text files can have binary graphics -- you cannot grow a file if binary graphics are on the end.

The code is beautiful. I always break compatibility to keep it perfect.

It is limited to 100,000 lines. The file util flags are okay.

You must stop assuming everything grows in size. It is done and it is a fixed size.

TerryADavison Adapton: Programming Language Abstractions for Incremental Computation

My compiler compiles 100,000 lines of code a second.

50,000 lines are compiled during boot (half a second).

50,000 lines are compiled during MakeAll (half a second).

If you echo to screen, compiles slowly.

TerryADavison Is it a language, or an operating system, or a virtual machine?

I made an x86_64 operating system with a compiler. The compiler compiles a dialect of C/C++. It operates both JIT and AOT.

TerryADavison A Constructive Look at TempleOS

It is multiprocessing, but not fair sharing. I like to call it single-process multiple thread. There is no difference between "task", "Process" or "thread". It is single address map. Paging in not used, basically.

TerryADavison TempleOS is applying to Y Combinator. Partners desired, send an email

Applications and Demos don't count.

TerryADavison TempleOS is applying to Y Combinator. Partners desired, send an email

Thanks!

TerryADavison TempleOS is applying to Y Combinator. Partners desired, send an email

I'm Terry Davis.

My email address is tdavis@templeos.org .

TerryADavison TempleOS is applying to Y Combinator. Partners desired, send an email

It would be a lot of work, but it's possible. I made it wed to x86_64.

TerryADavison TempleOS is applying to Y Combinator. Partners desired, send an email

I'm going by the standard, "First get users and profit will follow."

I have an ace up my sleeve because God talks. Not just to me! A guy made a IRC chatbot and that talks too.