VOGONS


Dos 6 conventional memory tricks

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Reply 240 of 248, by GigAHerZ

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Carrera wrote on 2021-03-17, 10:27:

I remember that tip as well!
Also, if you were lucky to have 2 hard drives setting those parameters to the other drive could sped things up a bit...

Woah, what's the logic in that? Something related to seek times?

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Reply 241 of 248, by Carrera

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Basically.. Yeah
In general if you could afford it you put the operating system on one hard drive and all other stuff on another as you tend to read from one and write to the other thus saving (admittedly milliseconds) time.
It was probably not very useful....

There was also a trick of doing this with the other functions. I am nut sure it was SmartDrive or the swap file maybe...?

Reply 242 of 248, by megatron-uk

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Actually, splitting temporary file areas, swap and other things across multiple drives, as well as seperating the OS out from applications is still very common - think about a modern multi-tasking operating system; it's nearly always doing more than one thing at a time. In the days when hard drive transfer rates were measured in single digits to dozens of megabytes it was incredibly easy for one badly performing process to lock up your system by starving all IO.

Move the IO for that application to another drive/channel, and your other applications (and the OS itself) can continue with other IO requests while that application (slowly) performs its reads and writes.

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Reply 243 of 248, by Jo22

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^^ I think the same.

I guess ROM-based operating systems like Atari TOS did have an advantage here.

They had instant access to their libraries of code, without needing fixed disk drives.

In fact, they still have that advantage.
They never had to fight over disk i/o with the applications.

Operating systems like Windows will always be behind in this specific point, I think,
unless they are being run on a RAM drive.

Speaking of RAM drives/disks, Linux has the ability to run in such an environment (TO RAM argument).

However, if we're a little bit sarcastic, we could say that it requires that option somewhat badly also.
It handles everything through the file system, after all (everything's a file). 😉

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Reply 244 of 248, by GigAHerZ

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Well, today's operating systems keep a lot in the ram and therefore kinda run from a "ram drive". It's not a new idea...

"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!

Reply 245 of 248, by Intel486dx33

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By loading everything high in config files on my 486 I am able to use just 3 megabyte’s of conventional memory of my 16 megabyte’s of ram.
Has anyone been able to use less on a 486 running DOS 6.22 ?

Reply 246 of 248, by cyclone3d

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Intel486dx33 wrote on 2021-06-03, 05:13:

By loading everything high in config files on my 486 I am able to use just 3 megabyte’s of conventional memory of my 16 megabyte’s of ram.
Has anyone been able to use less on a 486 running DOS 6.22 ?

What? Conventional memory is the first 640KB of RAM.

Did you mean to say that you are able to only use 3KB of conventional memory, giving you ~637KB of free conventional memory?

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Reply 247 of 248, by Caluser2000

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cyclone3d wrote on 2021-06-03, 05:25:
Intel486dx33 wrote on 2021-06-03, 05:13:

By loading everything high in config files on my 486 I am able to use just 3 megabyte’s of conventional memory of my 16 megabyte’s of ram.
Has anyone been able to use less on a 486 running DOS 6.22 ?

What? Conventional memory is the first 640KB of RAM.

Did you mean to say that you are able to only use 3KB of conventional memory, giving you ~637KB of free conventional memory?

I'd like to see his config.sys and autoexec.bat files........

As well as the C:\>mem output.

There's a glitch in the matrix.

Apparently 32-bit is dead and nobody likes P4s.

Reply 248 of 248, by GigAHerZ

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Caluser2000 wrote on 2021-06-03, 06:50:

As well as the C:\>mem output.

"mem /c/a > output.txt" would be the best. 😀

"640K ought to be enough for anybody." - And i intend to get every last bit out of it even after loading every damn driver!