VOGONS

Common searches


First post, by John1985

User metadata
Rank Newbie
Rank
Newbie

My computer is Corei5(3GHz, 4CPUs), 12GB RAM.
My working VM is Ubuntu, 2Cpus, and 2GB RAM.
My game uses 10% of CPU and 1.3% of RAM in VM.
When I run the cross-compiled game in DOSbox, it is really slow and slow..

- Does this uses the same amounts of CPU and RAM as the case of Ubuntu in DOSbox, too?
-If so, it is very slow and sometimes freezes. So what is the limit value of CPU and RAM for Dos playing?

Reply 1 of 11, by cyclone3d

User metadata
Rank l33t++
Rank
l33t++

What game exactly? What CPU model exactly? The different generations have a pretty wide range of performance differences.
What speed RAM? What speed is it running at?
Are you running dual or single channel on the RAM?
12GB is a strange amount for any setup with an i5 unless you are running 2x4GB sticks and 2x2GB sticks.

Yamaha YMF modified setupds and drivers
Yamaha XG resource repository - updated November 27, 2018
Yamaha YMF7x4 Guide
AW744L II - YMF744 - AOpen Cobra Sound Card - Install SB-Link Header

Reply 2 of 11, by Gmlb256

User metadata
Rank Oldbie
Rank
Oldbie
cyclone3d wrote on 2021-09-13, 21:10:

What game exactly?

Seems to be related to another thread which was about bottleneck on DOS programming, where he was testing some games that uses an unusual amount of RAM on DOS. Here's an excerpt from that thread.

As DOS is really slow and uncomfortable to work, I am coding and make build for both Ubuntu and DOS using DJGPP. My ubuntu vm ha […]
Show full quote

As DOS is really slow and uncomfortable to work, I am coding and make build for both Ubuntu and DOS using DJGPP.
My ubuntu vm has 2 cpus and 2GB ram, but anyway, it always uses only 10.2% of ram while running.
According to this percentage, the program must use about 240MB in DOS, am I right?
Though I increase the memory size to 300MB in DOSbox, it crashes all the time, and so real dos does.
Could you kindly explain about this?
Actually, that is a simple 2D graphic game, and it is being developed by allegro.
What I am wondering about is that many DOS games sizes over 100MB and support 3D rendering, they work well in low-spec Dosbox!

I wonder where these "many" DOS games comes from since the actual ones doesn't even use that huge amount of RAM.

Last edited by Gmlb256 on 2021-09-13, 22:07. Edited 1 time in total.

Reply 3 of 11, by leileilol

User metadata
Rank l33t++
Rank
l33t++

DOSBox doesn't support allocating more than 63MB (and frankly it doesn't have to as no commercial dos game then really demanded more than 32MB at most). Also DOS gaming died before 64MB became the norm, as well as before 7th generation CPUs and before Windows 2000's launch 😀

apsosig.png
long live PCem

Reply 4 of 11, by Caluser2000

User metadata
Rank l33t
Rank
l33t

I'm guessing this thread should be in an emulated section.

There's a glitch in the matrix.
A founding member of the 286 appreciation society.
Apparently 32-bit is dead and nobody likes P4s.
Of course, as always, I'm open to correction...😉

Reply 6 of 11, by leileilol

User metadata
Rank l33t++
Rank
l33t++

Q2DOS never came out in DOS's heyday. Also the assumptions of memory required comes from the old "disk usage=memory" ignorance. dos games aren't roms with everything loaded at once. The same applies to Windows 3.x stuff (i.e. the Living Books series doesn't require 512mb ram as some claim)

apsosig.png
long live PCem

Reply 8 of 11, by Gmlb256

User metadata
Rank Oldbie
Rank
Oldbie
_Rob wrote on 2021-09-18, 12:23:

Win98 and WinME support up to 512MB, and this is a supported config by DOSBox-X.

DOSBox ECE also supports configuring the memory up to 384MB RAM.

The 64MB RAM limitation was only meant for the original DOSBox, not any derivatives that may have different purposes than running DOS games from the era which they were mainstream. The OP didn't even state if he was running the original one or not.

Reply 9 of 11, by Jo22

User metadata
Rank l33t++
Rank
l33t++

Himem.sys (the XMS manager) from the DOS 5/6 era had a 64MB limit, as well.

"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//

Reply 11 of 11, by Jo22

User metadata
Rank l33t++
Rank
l33t++
Gmlb256 wrote on 2021-10-10, 15:54:
Jo22 wrote on 2021-10-10, 14:12:

Himem.sys (the XMS manager) from the DOS 5/6 era had a 64MB limit, as well.

Even older versions of HIMEM.SYS had a 16MB RAM limit. 😉

Oh. I didn't know, thanks for telling me. 🙂👍
I assume, that was perhaps related to ISA bus/286 CPU somehow. Would make sense.

"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//