Issue making a dos disk...

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Van gdx

Enlighted (5582)

afbeelding van gdx

19-05-2022, 02:35

sdsnatcher73 wrote:

No it does not, DOS2 and Nextor require 128kB. Nextor’s embedded DOS1 kernel runs on 64kB (but I would hardly call that Nextor, it’s just DOS1 imho).

This works on my HX-10 with the Sunrise CF and Nextor driver installed! CF card needs to be formatted with _FDISK on the MSX1 (or another MSX by pressing key 1 at startup if it has more than 64kB RAM). I am sure I tried again today. If FDISK bugs (because it is unstable), you have to reset the MSX and resume again but it works. I copied the DOS1 to the partition and copied some files, everything works. Only FDISK needs to be improved a little to make it more stable.

Van sdsnatcher73

Prophet (3388)

afbeelding van sdsnatcher73

19-05-2022, 04:59

Yeah but it’s just DOS1… it’s hard enough to explain the difference between Nextor, DOS2 and DOS1 to new people to the scene. When someone says Nector works it should mean you can boot NEXTOR.SYS.

Booting Nextor anyway has no limitations on MSX generation, Nextor works on all MSX models as long as they have at least 128kB memory mapped RAM (so 64kB internal and a 64kB RAM cartridge won’t work either)

Van gdx

Enlighted (5582)

afbeelding van gdx

19-05-2022, 11:25

gdx wrote:

i think Nextor works on 64kB machines using disk or partition formatted FAT12 (up to 16M) without folder.

I meant Disk-ROM for Nextor.

sdsnatcher73 wrote:

Yeah but it’s just DOS1…

And that's why I said no need to flash the msx-dos 1.8. It is already included in Disk-Roms 2.xx.

MSX-DOS2 requires 128kB RAM and the Disk-ROM 2.xx that contains the MSX-DOS1 and MSX-DOS2 kernels + a disk driver (for FDD drive, flash card or other).

By default, the computer boots with the MSX-DOS2 kernel when the boot disk is formatted under the MSX-DOS2 or Disk-BASIC v2. It boots on MSX-DOS1 if the boot disk is formatted under the MSX-DOS1 or Disk-BASIC v1. When any disk is present, we can force to boot on Disk-BASIC v1 by pressing the key 1.

sdsnatcher73 wrote:

it’s hard enough to explain the difference between Nextor, DOS2 and DOS1 to new people to the scene.

Nextor is just an improved MSX-DOS2 to support the FAT16. It is not fundamentally different. The name has been changed because this is an unofficial version.

In short:
- MSX-DOS1 requiers 64kB RAM (32kB under BASIC) + Disk-ROM v1
- MSX-DOS2 / Nextor requiers 128kB RAM + Disk-ROM v2 (Disk-ROM v1 is included).

The system can manage up to 4 disk drivers whatever the version. Each driver should handle up to two disks each, but there are exceptions. Anyway, it's 8 disks maximum in total.

The disk driver is optional. I don't know how the system chooses the drivers. I guess it chooses the most recent Disk-Rom as master Disk-Rom, then it installs the other 3 in the slots order.

I'll put it in the wiki if it's not already done.

sdsnatcher73 wrote:

so 64kB internal and a 64kB RAM cartridge won’t work either

Yes, you are right to point that out. MSX-DOS2 requires 128kB RAM in the same slot so with a standard Memory Mapper. I add that MSX-DOS1 requires 64kB RAM (16kB on each page and without Memory Mapper on MSX1, except if it is a MSX1 compatible Memory Mapper. I think MSX-DOS1 from MSX-DOS2 or Nextor doesn't have this limitation).

Van sdsnatcher73

Prophet (3388)

afbeelding van sdsnatcher73

19-05-2022, 16:15

Well with flash dos18 he meant put the disk image on the USB flash drive, not flash it into the Rookie…

Van foody

Champion (441)

afbeelding van foody

19-05-2022, 21:00

Sorry for my bad English. What I meant was I hooked an external USB disk drive into the rookie drive nx USB port...after I used MSX floppy disk manager application in windows where I wrote dsk image back to a real disk and then booted on real disk. I have been quiet because I keep reading the conversation back and forth and I am learning alot by just listening or in this case reading.

Thank you all for all these replies back and forth...all of you are teaching me new stuff!

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