Re: Exercises and Example Programs that teach the C Programming Language

Posted on 2024-05-03, 07:29

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by llm

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I enjoy "C: A Reference Manual" by Harbison & Steele. The 5th edition is very easy to find online in PDF format. I just read a couple of sentences about types and I am blown away. I was so excited I had to put [my phone] down because there were other people around me and I couldn't contain myself. …

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Re: Exercises and Example Programs that teach the C Programming Language

Posted on 2024-05-02, 05:57

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by llm

in Milliways

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How can I find the exercises and Example Programs I need online? using google as for everything on the internet - for example: "github c examples beginner" many not super-trivial but more "practical" examples: work youself through these - refere to the specific github project file if you got …

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Re: MS-DOS 4.00 is now open source

Posted on 2024-04-30, 14:43

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by llm

in Marvin \ Software

in Marvin \ Software

Jo22 wrote on 2024-04-30, 13:58: About the compilation issue. There's a commenter in the YouTube comment section who says he got it working by fixing the paths (setenv.bat?) I'll atrach the quote here once I'm at home. this one seems to work: https://www.youtube.com/watch?v=X7r76V_gWQ8

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Re: MS-DOS 4.00 is now open source

Posted on 2024-04-30, 09:08

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by llm

in Marvin \ Software

in Marvin \ Software

So it seems that they included (parts of) Microsoft C and Macro Assembler... does that mean that they are freeware? Did they released as complete free products before? its seems to be a more or less full lib/includes/exe install of MSC 5.1 and MASM 5.1 - binary identical with some extra executables …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-26, 08:56

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by llm

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and I am surprised to learn from you how prevalent C is. its absolutely depends on the area you're working in - can differ very much - there is no "this language is the best for everything" - you can't write a kernel with javascript but that doesnt mean that a C developer is able to write a kernel …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-25, 08:34

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by llm

in Milliways

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Ok. If the POSIX API is that unwieldy, that people who program for a living don't concern themselves with it than I need a different API. This is because I plan to have some kind of "deep dive" into something more challenging you really don't get it - you don't need any library to learn C - and you …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-24, 19:46

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by llm

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you making everything soooo complicated.... you don't need to do POSIX or any OS specific programming to have contact with pointers, arrays, memory, stack, file I/o, etc - that is in normal C code - of every C program you will ever program - on Windows, Linux, only using C-Standard - even when …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-24, 15:35

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by llm

in Milliways

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I can use GCC and it's IDE and debugger... gcc does not come with an IDE or debugger - gcc is just a command line compiler - nothing more - all other tools like gdb and variants of IDEs are seperate developed projects by different developers But maybe now my process is to locate books. sorry can't …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-24, 14:23

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by llm

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I was specifying the compiler I had in mind so that you and other programmers would know which one I had in mind. only you think its relevant in any form - its not - i need to use all of them - the differences are marginal there are only multiple C compilers because some developers like the way …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-24, 06:39

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by llm

in Milliways

in Milliways

C is standarized so every non ages old compiler is fully capable to be used - MSVC,clang,gcc, intel are useable on (nearly) every OS - no need to selecting something special for C development No dos targets at the moment. I am planning to start with modern Linux OS and GCC. what is you primary OS …

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Re: Looking for help with analyzing disassembled code->

Posted on 2024-04-23, 07:56

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by llm

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Also, how I am going to figure out the application code if I don't know what C function's they're calling or what part of the binary is application code? all functions that are labled by IDA as 'Attributes: library function' are library functions - all function called by these are implementation …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-23, 06:36

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by llm

in Milliways

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I am realizing that my problem might be caused by a lack of understanding of fundamental computer organization and architecture of the PC. Where does one learn the kind of advanced programming that goes into graphics programming in c? Do you study assembly code first and then move back to c …

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Re: Looking for help with analyzing disassembled code->

Posted on 2024-04-23, 06:20

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by llm

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I think I understand now. My copy of stat.h refers to "System V" so dtoxmode basically converts between MS-DOS file attributes and Unix/Linux (POSIX?) file attributes and has to refer to the .bat, .com and .exe extensions because MS-DOS doesn't have an "executable" attribute like Linux/Unix (POSIX …

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Re: Looking for help with analyzing disassembled code->

Posted on 2024-04-22, 16:36

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by llm

in Milliways

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Are you saying dtoxmode refers to that particular data? dtoxmode referes to some string with file extensions No, I am not looking for file interaction per se, I just wanted to know what dtoxmode does. jmarsh got the answer most of the std clib functions are wrappers or mappers for DOS details into …

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Re: Looking for help with analyzing disassembled code->

Posted on 2024-04-21, 14:43

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by llm

in Milliways

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I found a reference in the IDAPro assembly code to a function called "dtoxmode" but I can't find any information about it online. Has anyone ever heard of it? The assembly code in question is attached a post by llm in this thread. the game is compiled with Microsoft C 5.1 (according to IDA Pro and …

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Re: Looking for help with analyzing disassembled code->

Posted on 2024-04-19, 19:34

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by llm

in Milliways

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@llm: I have gotten around to looking at the disassembled code you generated with IDAPro, it's a great help! I have made a lot of progress figuring out all that assembly code. Thank you! :-) ...and you didn't felt the magic of using the interactive disassembler itself - only the boring dead results …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-19, 19:33

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by llm

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Is djgpp library & GCC better than open Watcom for cross compiling? what means better for you? ease of installation, standard support, speed of generated code?... Open Watcom is newer and uses git to install. git is a version control system - its not used for installing - or do you mean its hostet …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-18, 17:59

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by llm

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im not cross compiling with clang - only with watcom in this project with clang and clang-tidy in only compile (not link to create an executable or something) to check if my source code contains errors/flaws that decates old compiler just ignore - to get it compile im "dummy" the DOS-only code to …

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Re: What tool debugs a miscalculated area of memory in a game program written in C?

Posted on 2024-04-18, 15:27

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by llm

in Milliways

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clang for example don't like your code To do what you seem to me to be doing, cross compiling, this is going to be a major step up for me. I will definitely work on it. But I really can't understand without starting off a several weeks long journey into the topic of cross compiling for MSDOS …

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Re: Looking for help with analyzing disassembled code->

Posted on 2024-04-17, 14:19

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by llm

in Milliways

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its always nice to see how a big chunk of wild 16bit asm can be just a one liner in 32/64bit code 😀

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