DOS ain't dead - WDe and GPT, booting DOS

WDe and GPT, booting DOS (Users)

posted by Japheth , Germany (South), 25.10.2022, 17:29

> how did you do this?
>
> did you re-invent "Hybrid GPT" by writing a MBR into the boot sector?

No. I added some code to the FAT32 bootsector ( sector#2 ) to intercept Int 0x13
and return a fake FAT32 PT entry if sector 0 of HD 0x80 is read.

Also, in config.sys the very first device driver is one that restores the old Int 0x13 vector ( by using good old "virus call" int 2Fh, ah=13h :-D ).

---
MS-DOS forever!

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Complete thread:

WDe and GPT, booting DOS - Japheth, 24.10.2022, 10:56
- WDe and GPT, booting DOS - tom, 24.10.2022, 17:31
  - WDe and GPT, booting DOS - Japheth, 25.10.2022, 05:24
    - WDe and GPT, booting DOS - tom, 25.10.2022, 13:40
      - WDe and GPT, booting DOS - Japheth, 25.10.2022, 17:29
        WDe and GPT, booting DOS - Zyzzle, 27.10.2022, 16:08
        WDe and GPT, booting DOS - Japheth, 27.10.2022, 16:41
        WDe and GPT, booting DOS - Japheth, 28.10.2022, 20:13
        WDe and GPT, booting DOS - Zyzzle, 29.10.2022, 02:39
        WDe and GPT, booting DOS - Richard, 02.11.2022, 03:39
        WDe and GPT, booting DOS - Zyzzle, 02.11.2022, 06:43
        WDe and GPT, booting DOS - Japheth, 02.11.2022, 07:55
        WDe and GPT, booting DOS - ecm, 02.11.2022, 09:55
        WDe and GPT, booting DOS - ecm, 02.11.2022, 11:21
        WDe and GPT, booting DOS - Japheth, 04.11.2022, 08:06
        WDe and GPT, booting DOS - ecm, 04.11.2022, 10:14
        WDe and GPT, booting DOS - ecm, 04.11.2022, 11:30
        WDe and GPT, booting DOS - Richard, 03.01.2023, 16:37
        WDe and GPT, booting DOS - ecm, 04.01.2023, 13:42
        Booting FreeDOS from an MS-DOS v7 compatible IO.SYS - ecm, 04.01.2023, 14:11
        WDe and GPT, booting DOS - Richard, 10.11.2022, 13:11
        WDe and GPT, booting DOS - Japheth, 10.11.2022, 17:55
        WDe and GPT, booting DOS - Richard, 22.11.2022, 07:10
        WDe and GPT, booting DOS - Rugxulo, 22.11.2022, 09:00
        WDe and GPT, booting DOS - Japheth, 22.11.2022, 09:52
        WDe and GPT, booting DOS - Richard, 22.11.2022, 12:29
        WDe and GPT, booting DOS - Japheth, 22.11.2022, 15:26
        WDe and GPT, booting DOS - Richard, 28.11.2022, 13:18
        WDe and GPT, booting DOS - Japheth, 28.11.2022, 16:57
        WDe and GPT, booting DOS - Richard, 08.12.2022, 17:21
        WDe and GPT, booting DOS - Japheth, 09.12.2022, 05:10
        WDe and GPT, booting DOS - Richard, 11.12.2022, 03:08
        WDe and GPT, booting DOS - Japheth, 11.12.2022, 10:39
        WDe and GPT, booting DOS - Richard, 11.12.2022, 14:53
        WDe and GPT, booting DOS - Japheth, 12.12.2022, 10:34
        WDe and GPT, booting DOS - Richard, 21.12.2022, 17:30
        WDe and GPT, booting DOS - glennmcc, 21.12.2022, 19:07
        WDe and GPT, booting DOS - Japheth, 22.12.2022, 14:52
        WDe and GPT, booting DOS - glennmcc, 22.12.2022, 18:41
        WDe and GPT, booting DOS - Richard, 23.12.2022, 01:49
        WDe and GPT, booting DOS - glennmcc, 23.12.2022, 05:06
        WDe and GPT, booting DOS - Richard, 23.12.2022, 06:46
        WDe and GPT, booting DOS - Richard, 26.12.2022, 12:16
        WDe and GPT, booting DOS - Richard, 28.12.2022, 09:34
        WDe and GPT, booting DOS - Japheth, 28.12.2022, 12:05
        WDe and GPT, booting DOS - Richard, 28.12.2022, 17:27
        WDe and GPT, booting DOS - Japheth, 29.12.2022, 19:32
        WDe and GPT, booting DOS - Richard, 30.12.2022, 07:52
        WDe and GPT, booting DOS - Zyzzle, 31.12.2022, 08:23
        WDe and GPT, booting DOS - Japheth, 02.01.2023, 13:04
        WDe and GPT, booting DOS - Richard, 03.01.2023, 03:51
        WDe and GPT, booting DOS - glennmcc, 03.01.2023, 04:05
        WDe and GPT, booting DOS - Richard, 03.01.2023, 04:37
        WDe and GPT, booting DOS - Richard, 03.01.2023, 05:17
        WDe and GPT, booting DOS - jadoxa, 04.01.2023, 01:02
        WDe and GPT, booting DOS - Japheth, 03.01.2023, 09:14
        WDe and GPT, booting DOS - Richard, 16.01.2023, 02:50
        WDe and GPT, booting DOS - Richard, 08.12.2022, 17:22
        WDe and GPT, booting DOS - Richard, 08.12.2022, 17:24
      - WDe and GPT, booting DOS - RayeR, 15.12.2022, 19:49
        WDe and GPT, booting DOS - tom, 15.12.2022, 20:14
- WDe and GPT, booting DOS - tom, 24.10.2022, 18:15
  - WDe and GPT, booting DOS - Zyzzle, 25.10.2022, 02:55
    - WDe and GPT, booting DOS - tom, 25.10.2022, 13:39
  - WDe and GPT, booting DOS - tom, 03.01.2023, 17:14
    - WDe and GPT, booting DOS - Richard, 03.01.2023, 17:44
      - WDe and GPT, booting DOS - fritz.mueller, 03.01.2023, 18:17
        WDe and GPT, booting DOS - Richard, 03.01.2023, 18:28
        WDe and GPT, booting DOS - glennmcc, 03.01.2023, 22:10
- WDe and GPT, booting DOS - glennmcc, 24.10.2022, 19:09
- WDe and GPT, booting DOS - rr, 24.10.2022, 20:19
  - WDe and GPT, booting DOS - Japheth, 25.10.2022, 05:14
- WDe v1.0 - Japheth, 14.11.2022, 10:35
  - WDe v1.0 - boeckmann, 14.11.2022, 22:00
  - WDe v1.0 - Zyzzle, 15.11.2022, 02:38
    - WDe v1.0 - Japheth, 15.11.2022, 20:10
      - WDe v1.0 - RayeR, 15.12.2022, 19:41