DOS ain't dead - DOS on Compaq EVO T20 thin client

DOS on Compaq EVO T20 thin client - possible? (Developers)

posted by RayeR , CZ, 09.11.2008, 00:37

> Are you sure that the HDD image is partitioned and formatted correctly?

Not 100%. The only one indicia is the original NTFS bootsector which says that HDD CHS parameters are: 208 heads, 56 sectors/track, 8 cylinders (quite odd but it is suited for the FlashROM size). Here is the orig BS dump:

[image]

Another non-strandard thing is a fact that MBR (and partition) is ignored at all! I can zero it and booting is not affected. BIOS simply reads the 2nd sector, expecting it is bootsector on 1st primary active partition. Of course I did some binary moves after creating my hdd image to match this. In BOCHS it boots properly.

> Maybe there is a problem with either LBA or CHS in the INT 13h emulation
> services? There should be suitable options in SYS to deal with this kind
> of problems.
>
> Have you tried some other DOS version?

FreeDOS hangs in very beginning stage displaying just "FreeDOS" (it should display "FreeDOS" "FAT" "KERNEL" "GO!". I tried also MS-DOS 6.22 and 7.x and they seems to get somewhere futher - end with "Non-System disk or disk error" so it seems did not located system files (but in BOCHS yes). Finally I used bootprep a nd copy NT loader files (ntdetect, ntldr, boot.ini) and it works, bootmenu appeared and finished with missing hal.dll (of course it was not there).

Here is my experimental hdd image with NT loader and dos bootsector image trying to be loaded with NT loader. If someone would check it.

> Can you boot (Free)DOS from a USB memory stick or a USB FDD/HDD?

No this doesn't provide any USB legacy support. So I have to rely on USB mass storage and HID drivers.

---
DOS gives me freedom to unlimited HW access.

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Complete thread:

DOS on Compaq EVO T20 thin client - possible? - RayeR, 08.11.2008, 17:48 (Developers)
- DOS on Compaq EVO T20 thin client - possible? - mht, 08.11.2008, 18:32
  - DOS on Compaq EVO T20 thin client - possible? - RayeR, 09.11.2008, 00:37
    - DOS on Compaq EVO T20 thin client - possible? - RayeR, 09.11.2008, 13:09
      - DOS on Compaq EVO T20 thin client - possible? - mht, 09.11.2008, 14:36
        DOS on Compaq EVO T20 thin client - possible? - RayeR, 09.11.2008, 16:36
        DOS on Compaq EVO T20 thin client - possible? - marcov, 11.11.2008, 09:31
        DOS on Compaq EVO T20 thin client - possible? - RayeR, 11.11.2008, 16:58
        DOS on Compaq EVO T20 thin client - possible? - rr, 11.11.2008, 20:31
        DOS on Compaq EVO T20 thin client - possible? - Rugxulo, 11.11.2008, 20:48
        DOS on Compaq EVO T20 thin client - possible? - RayeR, 11.11.2008, 21:18
        DOS on Compaq EVO T20 thin client - possible? - rr, 11.11.2008, 21:40
        DOS on Compaq EVO T20 thin client - possible? - Rugxulo, 12.11.2008, 00:24
        DOS on Compaq EVO T20 thin client - possible? - mht, 12.11.2008, 17:44
        DOS on Compaq EVO T20 thin client - possible? - RayeR, 14.11.2008, 22:10
        DOS on Compaq EVO T20 thin client - possible? - mht, 17.11.2008, 09:45
        DOS on Compaq EVO T20 thin client - possible? - RayeR, 24.11.2008, 23:28
        Yes, dynamic CHS! - RayeR, 29.11.2008, 22:20
        Yes, dynamic CHS! - ecm, 30.11.2008, 12:49
        Yes, dynamic CHS! - RayeR, 30.11.2008, 18:13
        Yes, dynamic CHS! - ecm, 30.11.2008, 20:34
        Yes, dynamic CHS! - RayeR, 30.11.2008, 22:34
        Yes, dynamic CHS! - tom, 02.12.2008, 13:34
        Yes, dynamic CHS! - RayeR, 02.12.2008, 17:14
        DOS demo show on T20! - RayeR, 03.12.2008, 04:21
        DOS demo show on T20! - Rugxulo, 06.12.2008, 12:13
        DOS demo show on T20! - RayeR, 07.12.2008, 13:34
        DOS demo show on T20! - rr, 07.12.2008, 16:56
        DOS demo show on T20! - mht, 08.12.2008, 20:31
        DOS demo show on T20! - RayeR, 08.12.2008, 21:06
        DOS demo show on T20! - mht, 08.12.2008, 21:28
        DOS demo show on T20! - RayeR, 09.12.2008, 11:55