91–100 of 101 posts
At one point when I was considerably younger I started learning 32-bit x86 assembly as my very naive career goal was to become the next Linux Torvalds. I managed to construct a multiboot-compliant 32-bit kernel that could load tasks from a ext2 ramdisk image passed to the bootloader and multitask up to around 64 processes. I figured out how to use the CR3 register and craft page tables, enter into kernel syscalls usi…
At one point when I was considerably younger I started learning 32-bit x86 assembly as my very naive career goal was to become the next Linux Torvalds. I managed to construct a multiboot-compliant 32-bit kernel that could load tasks from a ext2 ramdisk image passed to the bootloader and multitask up to around 64 processes. I figured out how to use the CR3 register and craft page tables, enter into kernel syscalls usi…
Have you published a plugin or the source? Sounds very interesting for using in computers inside the game (as in Fallout and the like).
I actually got paid a salary for learning & programming in IBM mainframe assembler (BAL or Basic Assembly Language) in 1970, for an insurance company. The CPU memory was so small (32K, yes 32,768 bytes) that the only way we could squeeze enough functionality was to write in assembler, with overlays (no virtual memory). Debugging consisted of manually toggling hex data and instructions at the control panel. What a bla…
32KB was a ton of memory in the 70s.
Earlier quoted context omitted.
https://www.google.com/amp/s/www.vox.com/platform/amp/policy...
Dammit. Wrong link. Here is the correct one: https://www.elsevier.com/books/linkers-and-loaders/levine/97...
Earlier quoted context omitted.
I would not have guessed that there were automatic ECG analysis in 1970! Was it good? Are today's methods any better?
We were the first commercial offering. There was one or two working at universities. It was quite good. I would imagine that they are--I haven't kept track.
The landscape is vastly different these days. You can't even stand up something in a medical environment that measures heart rate, much less waveforms without significant clinical trials. Apparently the FDA is all over this one.
I actually got paid a salary for learning & programming in IBM mainframe assembler (BAL or Basic Assembly Language) in 1970, for an insurance company. The CPU memory was so small (32K, yes 32,768 bytes) that the only way we could squeeze enough functionality was to write in assembler, with overlays (no virtual memory). Debugging consisted of manually toggling hex data and instructions at the control panel. What a bla…
Ooo! I have a question! Where do I learn more about overlays? The BSD 2.11 code I've read has comments about overlays, but I have no idea where to learn more about how to understand the topic. I came across it while I was seeing if I could get newlib to compile for the PDP-11.
"OVL" popped up in my head for some reason, and https://www.google.com/search?q=dos+ovl seems to return interesting results (showing a few real-world examples).
I actually got paid a salary for learning & programming in IBM mainframe assembler (BAL or Basic Assembly Language) in 1970, for an insurance company. The CPU memory was so small (32K, yes 32,768 bytes) that the only way we could squeeze enough functionality was to write in assembler, with overlays (no virtual memory). Debugging consisted of manually toggling hex data and instructions at the control panel. What a bla…
Forgive me, but I'm struggling to understand how much useful work one could extract from a computer with only 32k of RAM. A microcontroller for an appliance, sure, but a mainframe? Could you tell us more about the work you were doing?
This seems to the same text as the author's Reverse Engineering for Beginners ( https://beginners.re/ ) https://news.ycombinator.com/from?site=beginners.re