One Chip MSX help needed

Champion (398)

04-06-2015, 12:34

Hi,

I have been playing with my new OCM. I was able to upgrade to kdl 3.3RC3, install the SD card with MSX-DOS 2.31 and start a rom through romload. However I run into some issues/questions:

1. When starting a disk image through EP.COM, the image is loaded, a reboot happens but then One chip MSX behaves strange. E.g.: When I use Sunrise Magazine #14 disk image I see the picture of the Sun coming up 9ALTHOUGH VERY SLOW) but after that black screen. Sometimes it looses also the VGA signal. Similar things happen with all the demo/magazine/music disk images I have (from the MCCM Millenium). Any idea how I can fix this?

2. I am not sure which latest versions of MSX-DOS 2 I should use. There is a 2.44 and the one I have now is 2.31. I am not sure the newer one will work on my OCM. Can you advise on which MSXDOS 2 version I should best use. I like to have it also the autocomplete command feature.

3. Is there somewhere a MSXDOS 2 package containing all handy utilities like unarchiving programs? What other MSX DOS software should I use?

4. How can I set a PATH in MSX DOS so I don't need to type a full path when I use for example ROMLOAD.COM?

5. Which "hotkeys" keys are there for using the OCM/KdL version?

I hope you can help out. Thanks.

By Grauw

Ascended (10819)

04-06-2015, 13:08

2. COMMAND2.COM and MSXDOS2.SYS have different version numbers; use COMMAND2.COM version 2.44 from tni.nl (that’s the one with tab completion), for MSXDOS2.SYS version 2.31 is fine.

4. In AUTOEXEC.BAT, you can write SET PATH=A:\;A:\UTILS;A:\MM;A:\VGM etc.

5. F12 is switch CPU speed. The others I don’t really use a lot. F9 or F8 is the select key I believe, you need that one sometimes. Iirc there’s a short manual in KdL’s OCM-PLD Pack v3.2, refer to that.

By -Neo-

Champion (398)

04-06-2015, 15:57

Thanks Grauw.

Succeeded in patching the orignal MSXDOS 2 to 2.44 on the OCM CD-ROM.

You have any idea what's wrong with point 1? Do demo disks work with your OCM? Which disk load program do you use?

And another thing: The keyboard and such works fine but somehow the "\" is shown as a Yen sign. You have that too? Can that be fixed?

By meits

Scribe (6571)

04-06-2015, 16:25

The yen sign is used as backslash on Japanese computers.

By -Neo-

Champion (398)

04-06-2015, 18:07

And how do I get rid of the Yen sign in MSDOS2 and see a \ instead?

By Grauw

Ascended (10819)

04-06-2015, 19:22

The Yen sign is normal on Japanese MSX computers, e.g. MSX turboR has it as well. There are builds of the KdL firmware with a backslash as well iirc, if you want it. Maybe not for the RC yet though, look in the 3.2 package if that’s the case.

By -Neo-

Champion (398)

04-06-2015, 19:46

Some discovery from myself on the first point: Several demo's seem to switch to 50HZ and the OCM doesn't like that: The signal on the VGA connector is lost. After pressing PrtScr 3 times (that switches the OCM output to VGA again) I get the VGA signal again but the music also starts to play faster (probably because the OCM switched to 60Hz).

What is funny though is that when I put in a music module same thing with the VGA happens and when pressing PrtScr 3 times again I get the picture but now instead that the music goes faster, it is too slow with the Music Module.

Is there anything I can do so 50Hz output is supported next to attaching composite/RGB (like to use my VGA)?

By -Neo-

Champion (398)

04-06-2015, 20:18

@Grauw
Yes if I remember right there is only 1 RC build. Then I wait for the next official release with all the builds.

By -Neo-

Champion (398)

05-06-2015, 16:13

Fixed point number 1 with the help of kdl. You have to set ds3 off if you only want 60Hz.

I have another issue now though: I try to mount a disk with ep.com like this:

ep moon.dsk e:

Then I get a message that it's a illegal device and the disk is not assigned to the drive letter. What do I wrong here?

By -Neo-

Champion (398)

05-06-2015, 16:19

Fixed point number 1 with the help of kdl. You have to set ds3 off if you only want 60Hz.

I have another issue now though: I try to mount a disk with ep.com like this:

ep moon.dsk e:

Then I get a message that it's a "illegal device assignment" and the disk is not assigned to the drive letter. What do I wrong here?

By DamnedAngel

Champion (286)

06-06-2017, 03:53

Hey -Neo-,

I am getting the same "illegal device assignment" message here in my Zemmix. Have you found the solution for the error?

best,