DOS ain't dead

Is there some DOS floppy utility that doesn't rely on DMA? (Developers)

posted by ecm  , Düsseldorf, Germany, 14.04.2024, 19:00

> I could be wrong, but I don't think any standard BIOS implementation would
> use DMA. The only implementation of DMA I think I've ever used for
> floppies was the venerable FastBack hard drive backup program. DMA helped
> the data get transferred to the floppies very quickly.

Actually, floppy diskette access seems to be a case where it's normal for the ROM-BIOS to use ISA DMA to access the disk. Consider the description of the int 13h error code 09h:

> 09h data boundary error (attempted DMA across 64K boundary or >80h sectors)

Why should this tell us we "attempted DMA" across a boundary if the ROM-BIOS didn't usually use DMA?

---
l

Complete thread:

• Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 23.03.2024, 16:56
  • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 28.03.2024, 00:57
    • Is there some DOS floppy utility that doesn't rely on DMA? - Zyzzle, 28.03.2024, 02:44
      • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 28.03.2024, 05:25
      • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 28.03.2024, 05:33
        • Is there some DOS floppy utility that doesn't rely on DMA? - rr, 29.03.2024, 13:57
        • Is there some DOS floppy utility that doesn't rely on DMA? - Oso2k, 29.03.2024, 23:14
          • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 30.03.2024, 06:46
        • Is there some DOS floppy utility that doesn't rely on DMA? - Zyzzle, 30.03.2024, 02:27
      • Is there some DOS floppy utility that doesn't rely on DMA? - rr, 29.03.2024, 14:11
        • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 30.03.2024, 06:42
  • Is there some DOS floppy utility that doesn't rely on DMA? - bretjohn, 30.03.2024, 01:12
    • Is there some DOS floppy utility that doesn't rely on DMA? - ecm, 14.04.2024, 19:00
      • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 15.04.2024, 17:29
  • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 01.04.2024, 15:45
    • Is there some DOS floppy utility that doesn't rely on DMA? - Laaca, 01.04.2024, 17:12
      • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 01.04.2024, 20:33
      • Is there some DOS floppy utility that doesn't rely on DMA? - RayeR, 03.04.2024, 03:06