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Fun with vDOS (Emulation)

posted by bocke(R), 16.03.2015, 11:10

> There's only three files: README, G.C, and (optional) CRT0.ASM , so
> (famous last words) it shouldn't be that hard to recompile.
>
> Problem #1: G471SRC.ZIP is using an old compression method ("Implode"),
> although Info-Zip still supports it. More crucial is the fact that he
> probably used PKZIP, which (at least DOS version) always capitalizes the
> filenames (bad!). So "G.C" [sic] is the source, which GCC thinks is C++ !!

or you can do (bash specific, can be done portably with tr):
for file in *;do mv $file ${file,,};done

This will renam everythinge to lowercase.

> BTW, I'm not *nix savvy at all (in case that wasn't obvious). So I have no
> clue what "caddr_t" is or how to use "mmap()" correctly. I did hack at it
> to compile, and it seemed to work okay, but I might've done it wrong. It's
> a bit weird to read because of the various #ifdef stuff in there (DOS,
> UNIX). Honestly, I would email somebody who knows this stuff, probably
> Ncurses maintainer (Thomas Dickey), to see what is going on. Though keep in
> mind he'll probably just tell you to use VILE instead (which does helpfully
> hop around #ifdef with '%' key).
>
> So I'm assuming he used mmap() for speed. I'm also assuming that the DOS
> version is a fallback of a simpler way of doing things. So I assume that
> will still work on Linux. So, inside Disk_to_mem(), I changed "#if DOS" to
> "#if 1" and "#if UNIX" to "#if 0". Then the only problem is that O_BINARY
> is undeclared, but they don't need or use that on *nix, so comment that
> out.
>
> Then, it compiles okay for me. "echo $LINES" under ROXTerm here says "34"
> (although I don't remember how, when, why, or if I set that manually). So
> that's more than 25, right? So my limited testing should be acceptable
> here. Okay, it runs, everything is green on black, and typing "4030" jumps
> to that line. Down arrow brings me to the main text, and it seems to show
> lines 4030 through 4060. So I guess it works.
>
> Patch follows (but beware, you need hard tabs in the makefile).
>
>
> diff -waNBU0 old/G.C new/G.C
> --- old/G.C       2015-01-07 14:21:32.000000000 -0600
> +++ new/G.C        2015-01-07 14:23:25.000000000 -0600
> @@ -4023 +4023 @@
> -#if DOS
> +#if 1 //DOS
> @@ -4028 +4028 @@
> -#if UNIX
> +#if 0 //UNIX
> @@ -4043,2 +4043,2 @@
> -#if DOS
> -    setmode( fd, O_BINARY );
> +#if 1 //DOS
> +    //setmode( fd, O_BINARY );
> @@ -4070 +4070 @@
> -#if UNIX
> +#if 0 //UNIX
> diff -waNBU0 old/GNUmakefile new/GNUmakefile
> --- old/GNUmakefile      1969-12-31 18:00:00.000000000 -0600
> +++ new/GNUmakefile        2015-01-07 14:24:33.000000000 -0600
> @@ -0,0 +1,7 @@
> +CC     = gcc
> +CFLAGS = -O2 -s -lncurses -w -x c
> +
> +g: G.C
> +  $(CC) $(CFLAGS) $< -o $@
> +  ls -l $@
> +     ldd $@
>


Or you can just do this:
#ifndef caddr_t
#define caddr_t char*
#endif


Credits to: http://computer-programming-forum.com/47-c-language/556a90938d01f023.htm

 

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