Questions tagged [ms-dos]
For questions regarding MS-DOS, the Microsoft Disk Operating System, and its batch scripting language. Do not use this tag for questions about DOS batch languages in general.
1
vote
1answer
104 views
Can DOS 6.22 recognize more than 504MB when the BIOS only supports CHS?
My CMOS setup correctly recognizes the geometry of the drive, (but does not support LBA). And FDISK in DOS 6.22 only recognizes 504MB. FDISK even shows the size of the primary partition as roughly ...
0
votes
2answers
155 views
Does anyone have an x86 EGA draw pixel routine?
So far, I have gotten by with using the BIOS draw-pixel routine here: http://stanislavs.org/helppc/int_10-c.html
This works of course, but I can't imagine that commercial games used this BIOS call as ...
2
votes
2answers
280 views
USB ports for a 486 laptop (pccard 16bits)
I have an old laptop 486 with PhoenixBIOS which supports PC card 16bits( PCMCIA II/III).
I am thinking about the possibility of adding a pccard 16bits with USB ports, mainly to read usbsticks or ...
10
votes
2answers
287 views
How to use the “darker” CGA palette using x86 Assembly?
For those of you retro developers out there, I am having a hard time figuring out how exactly to select the "darker" color palette in 320x200 CGA mode. Here's what I have so far:
setup_cga_graphics:
...
10
votes
4answers
390 views
For fast scrolling DOS games, when was Mode13h preferred over Mode X?
Back in the DOS days of gaming (more specifically, 80286 - 80486 era), developers typically needed to choose between using the chunky and easier Mode 13h or the more complex "Mode X" that provided ...
1
vote
1answer
288 views
Minimal DOS long filename driver
Am trying to run Latex + Emacs under DOS 5.0, and would currently seem to need long filenames. I have tried the DOSLFN driver but it prevents Emacs from running. I have 4 MB RAM in total.
Is there ...
34
votes
2answers
6k views
Did IBM encourage Bill Gates to retain the rights over PC-DOS?
As is well-known, Microsoft's negotiations with IBM to deliver PC-DOS 1.0 with the original IBM PC resulted in:
IBM licensing the OS from Microsoft, as opposed to purchasing it outright.
Microsoft ...
31
votes
8answers
4k views
How to put a delay in AUTOEXEC.BAT
I have this MS-DOS 6.22 machine which maps a network drive to a SAMBA share on a Raspberry PI. The PI is powered by a USB lead from the DOS machine, so the two power up together.
The mapping starts ...
12
votes
1answer
2k views
Where was the DOS cdd utility from?
I distinctly remember, on the computer I had in the 90's, being able to type cdd D:\bla\bla in the MS-DOS command prompt, to change both the current directory and drive (avoiding having to type D: ...
3
votes
3answers
330 views
Allocate 64KB in Watcom C 16-bit DOS
I'm trying to allocate a 64KB buffer in Watcom C 16-bit DOS. I'm using the "compact" memory model as it states [1] that the code segment is limited to 64KB through a near pointer (just offset) but ...
17
votes
1answer
1k views
When was QDOS changed to MSDOS?
So a while back, I heard that MSDOS was originally named QDOS (Quick and Dirty Operating System), and that it was later changed is MSDOS (Microsoft Disk Operating System). This was probably a ...
2
votes
2answers
206 views
MS-DOS, save data from COM1: to file and display on console at the same time
I have a MS-DOS 3.22 laptop that will receive simple text data over serial COM1.
I can make it save to file by doing TYPE COM1 >> data.log and I can make it show the data on the console with ...
1
vote
3answers
173 views
Was parsing or operating systems the first user of dollar sign as end of string/input?
According to the question Why did DOS use dollar-terminated strings? DOS uses dollar-terminated strings, inherited from CP/M which used them because DEC also used dollar as the string terminator.
...
3
votes
2answers
186 views
What 286 chipsets support UMBs?
I read in some forums that some 286 boards support UMBs and thus can load drivers and TSRs into the upper 384 KiB of conventional memory.
What chipsets support this and do I need special drivers?
11
votes
7answers
5k views
Is there a reason why MS-DOS didn't use more English words for commands?
When using diskpart, I can list all the drives by typing LIST DISK or to select a specific drive I can type select disk 1.
Is there a reason why MS-DOS didn't use more English words to do tasks, for ...
53
votes
3answers
10k views
Why did DOS use dollar-terminated strings?
According to a few tutorials I am seeing, DOS used dollar-terminated strings to write to the terminal. This seems to also be documented here on INT 21H.
AH = 09h - WRITE STRING TO STANDARD OUTPUT
...
14
votes
1answer
3k views
Name this PC DOS Combat Flight Simulator
I'm trying to remember the name of a PC DOS Combat Flight Simulator that I played around 1991/92. I can give the following details:
It was named after a US fighter plane that would have been in ...
3
votes
2answers
367 views
Can DOS boot to a hard drive other than HDA1?
I would like to experiment with DOS and would like to create a bootable partition on my hard drive (SDA) SATA device.
I created a 1G FAT32 formatted partition on my SATA hard drive (SDA) and tried ...
5
votes
1answer
396 views
Copying disk images to Commodore 64 floppy disks
For some time now I have been on a mission to get back into playing games on a Commodore 64. I have bought an original Commodore 64C. I got hold of a original 1541 disk drive. I also got hold of a ...
11
votes
2answers
700 views
Why did MS-DOS choose percent symbol to designate variable?
I couldn't find anything but is there any reason for choosing % over $ like in *nix shells?
25
votes
3answers
7k views
Were 9.2 file names possible in MS-DOS?
In MS-DOS (and FAT16), you could only have 8.3 file names (like QUESTION.TXT) with only single-case letters and numbers (and a few symbols). The MS-DOS Editor also defaulted to 8.3 - typing edit ...
5
votes
1answer
356 views
“Your program is testing for optimal display performance” for older Windows/DOS games
I remember seeing the following a lot when I was younger, and recently saw it again in a DOSbox setting:
For those that haven't seen it, the squiggly red lines shift and undulate quite a bit, and ...
6
votes
4answers
2k views
How do I create a boot menu to select between Windows and DOS?
I was not a PC user before Windows 98. But I remember one of my friends was using a boot menu in his 486 machine to select between Windows/DOS.
The menu was like:
1. EMS
2. XMS
3. Windows
If we ...
7
votes
4answers
390 views
An old DOS application that allowed to create cards, posters, invitations, etc
I remember an old (90's) program, run in DOS, that allowed its user to create posters, invitations, cards, etc. It had mouse support and its own GUI with windows, bars, fields, etc.
The work started ...
2
votes
4answers
481 views
Smart computing into MS-DOS? Is it possible?
The building I work in has an MS-DOS computer that runs the building's air system. My boss has asked me to make it so that he can use smart devices to make adjustments remotely.
How much would need ...
14
votes
4answers
2k views
What are my options for multitasking in MS-DOS 5.0 on an 80186 with EMS?
I've got an HP 200LX, which runs DOS 5.0 from ROM, and I'm using EMM200 to provide some EMS from the C: RAM disk (it uses the memory controller to directly map the "disk" blocks into memory, and thus ...
16
votes
2answers
576 views
What are these tiny TSRs doing?
I've been puzzled by this for a while now. The (very old) game Phantasie comes with three small TSRs that are run prior to running the main game executable. This is the content of the file PH.BAT, ...
1
vote
2answers
195 views
Mysterious things happening to stack when running a debug session
When I run a debug session using Freedos and debug.exe, I get a session like the following. I've added a description of what I saw as annotation on the image. Each step, I've printed out the stack ...
43
votes
2answers
9k views
Why is Windows using CRLF and Unix just LF when Unix is the older system?
Windows and MS-DOS use for new lines the control characters CR-LF (carriage return, line feed), while unix uses just LF.
As far as I know CR-LF made sense for systems controlling an real teletyper, ...
8
votes
2answers
253 views
What DOS software can I test a QIC-02 tape drive with?
I got a Wangtek 5150EQ tape drive that connects to a dumb (made of a bunch of 74-series logic chips) 8-bit ISA tape controller card. The controller card has a bunch of DIP switches which I used to ...
1
vote
1answer
282 views
Can I install DOS version 6.22 straight from IBM BASIC?
I accidently deleted my previous version of DOS on my IBM model 8525. I was messing around with it, not knowing much of DOS, and now I'm back to using "IBM BASIC". Would I be able to install DOS 6.22 ...
8
votes
5answers
742 views
How to patch binaries in DOS?
In the late MS-DOS era, what were the state of the art software tools for reverse engineering and patching binaries, i.e. .exe and .com files?
A simple list of the tools that were "state of the art", ...
4
votes
3answers
382 views
TSRs at top of memory conflicting with COMMAND.COM
I've seen that many TSRs installs themselves at the top of conventional memory. To do so they rely on the value at 0:413h/int 12h to tell how much conventional memory is available, and then update ...
7
votes
4answers
665 views
How did DOS know where to load itself in upper memory?
If I remember correctly, you could ask DOS to load in upper memory by writing something like...
DOS=UMB
...somewhere in the CONFIG.SYS file.
But the question is, how did DOS know what portions of ...
13
votes
2answers
3k views
Was OS/2 a viable alternative for daily DOS and Windows tasks?
After playing a bit with the OS, a question sparked my interest:
Could it entirely replace DOS and Windows ?
Let's restrict the scope of this question a bit since it's fairly broad,
Was it ...
16
votes
2answers
3k views
First commercial DOS game?
What was the first commercial game sold for use on IBM/MS/PC DOS after the IBM August 12, 1981 release.
0
votes
1answer
420 views
Where was MS-DOS used? [closed]
How widely was MS-DOS used? Was it globally, or just in some specific places?
Were there any regional substitutes used more commonly, and if so, what were they?
2
votes
4answers
1k views
Why were teletype printers not used for DOS computers?
Prior to the introduction of DOS in 1981 teletype printers were probably the most common hardcopy printer being used - usually in govt, educational or research facilities. When DOS arrived, teletype ...
34
votes
8answers
10k views
Is DOS being shipped with or as an installed OS?
Given the very small size of DOS, it would seem it might still be ideal for some applications such as handheld games. Is any system manufacturer still shipping DOS with their machine?
If no one is ...
24
votes
3answers
4k views
Where did DOS store graphics fonts?
I remember using a wysiwyg print program called Fontasy for CGI graphics in DOS because of a lack of standardized graphics fonts. Companies were selling "font packs" for other type fonts. Prior to Win ...
60
votes
3answers
11k views
What character is the MS-DOS cursor?
The cursor used on my 486 (and Pentium 3) in MS-DOS 6/7 has a thick underlined character. I cannot find that in code page 437. The underscore character is the closest to it, but is thinner.
Where ...
6
votes
3answers
550 views
How do you find information about your hard drive in MS-DOS?
Context: I'm running an original MS-DOS. I suspect the hard disk is failing, but don't want to shut it off for fear of not being able to get it started again if I can't swap the hard drive into ...
-1
votes
1answer
234 views
Run 8086 programs in dos using simple os other than any special software [closed]
I know to run 8086 using MASM & 8086 emulator, but how to run 8086 programs in dos without any special software.
24
votes
5answers
7k views
Are MS-DOS and Windows 9x vulnerable to Meltdown?
In an interesting crossover between current events and Retrocomputing, the vulnerability known as "Meltdown" was publicly disclosed on January 3rd 2018. The retro-computing tie-in is that this ...
7
votes
3answers
553 views
Is there a way to link object files for DOS from Linux?
I'm able to use NASM to assemble simple COM files from my modern Linux computer, but how can I create a DOS EXE file while still in Linux?
Specifically, I am interested in a solution that will target ...
28
votes
7answers
7k views
Is there a reason to prefer earlier versions of MS-DOS over later?
I understand MS-DOS to be backwards-compatible, so is there a reason to run a version earlier than the last (6.22) on an old computer? The only reason I can think of would be for period-accuracy, but ...
6
votes
6answers
1k views
Transfer files to DOS over serial cable from Linux?
I have a modern Linux computer and a 286 computer running DOS. I would like to transfer files from the Linux computer to the DOS computer over a null modem serial cable. I know you can use INTERLINK....
7
votes
2answers
730 views
Custom keyboard layout in DOS?
Is it possible to customize the keyboard layout in DOS? I use a custom keyboard layout on modern computers and I am wondering if I can do the same on old.
10
votes
5answers
2k views
Invert LCD screen in DOS 5.0
Would like to run "black on white" software on a DOS machine with an LCD screen, so am wondering if there are any TSR tools, or similar, for inverting the screen. I believe it is grey scale VGA, not ...
5
votes
3answers
366 views
What to do about “Invalid media type”
I have an old PC with a HDD that was using Double Space. Since I do not need the extra space, and want to minimise the system use of RAM, I attempted to re-format the drive normally.
After typing ...
