MiSTer FPGA Forum

did anyone manage to set the EMS memory?
i tried

emm386.exe frame = ????

but I can't find the right address

hi

i use EMM386.EXE 4096 RAM FRAME=E000 D=256 X=A000-C7FF I=C800-EFFF

for 4Mo EMS

I'm no DOS memory management guru, and I don't think I have anything handy that uses EMS to actually test it, but DR-DOS's EMM386 says this when asked to auto-detect the EMS frame:

ExCyber wrote: ↑Sun Jun 14, 2020 7:00 pm I'm no DOS memory management guru, and I don't think I have anything handy that uses EMS to actually test it, but DR-DOS's EMM386 says this when asked to auto-detect the EMS frame:

Code: Select all

Frame=E000  Kb=32768

Thank's
You can try Aladdin for the test

i will try

with these parameters, I no longer have an error, but I cannot launch any game
i will try with freedos

tontonkaloun wrote: ↑Sun Jun 14, 2020 10:05 pm with these parameters, I no longer have an error, but I cannot launch any game
i will try with freedos

If you're having trouble with EMM386, try QEMM instead.

I'm using it and it is compatible with most games.

Cheers,

or jemm (or jeemex with himem integrated)

https://github.com/Baron-von-Riedesel/Jemm

I also had trouble with EMM386, so installed QEMM 8.0 and nearly all games work.

For example lemmings 3 complains a lot about EMS, even on emulators... But with QEMM it works .

Hrm. I'll have to check my version of QEMM. I had it installed at one point, and it was *highly* unstable, so I switched back to EMM386.

abbub wrote: ↑Sat Jun 20, 2020 2:34 pm Hrm. I'll have to check my version of QEMM. I had it installed at one point, and it was *highly* unstable, so I switched back to EMM386.

I'm also using QEMM 8.0 and it's working mostly flawlessly.

I was unable to get a blank Dos 6.2 vhd to boot, found a pre-build one with a launcher for DOS Games. Most of the work fine with Qemm, but not all.

Beeble wrote: ↑Fri Jul 03, 2020 8:22 am I was unable to get a blank Dos 6.2 vhd to boot, found a pre-build one with a launcher for DOS Games. Most of the work fine with Qemm, but not all.

With the games under Dos, you will never have a config that make all the games work, between the sound card and memory problems (xms or ems)! You need a menu. In addition, the core is only limited to games until vga. In svga it will not work!

To have a blank vhd, you only have to reformat your vhd with a floppy dos6.22

It has been a while, but I used to handle EMS and the autoexec.bat/config.sys myself, will get into it again.

Since Disk Images work fine, I will try a MS Dos Install on an empty VHD, good suggestion!

Something I noticed is that when using Windows 98 as the DOS basis, then I can get a lot more highmem free. With a pretty solid EMS setup in 6.22 I can get about 592kb free when I have loaded DOS, but with the Windows 98 boot, I have more than 600kb free.

But, its not as compatible as 6.22 though. A good boot menu is the way to go. One for EMS and one for XMS should probably be enough for something like 95% of the games I think.

Phil has made a phantastic job with his Start Menu where you can select different configurations at start

https://www.philscomputerlab.com/ms-dos ... -pack.html#

Cebion wrote: ↑Sun Jul 26, 2020 5:45 am Phil has made a phantastic job with his Start Menu where you can select different configurations at start

https://www.philscomputerlab.com/ms-dos ... -pack.html#

It is a good job, just take note that the MiSTer requires extra settings so his initial setup wont work for EMS. You need to add something like this:
FRAME=E000 D=256 X=A000-C7FF I=C800-EFFF
I think its to ensure it uses the correct memory area.

We can maybe adjust it for our needs