28 May
2024
28 May
'24
5:13 p.m.
On 5/28/24 17:02, ben via cctalk wrote:
On 2024-05-28 5:45 p.m., Chuck Guzis via cctalk wrote:
There were several device drivers that hooked the BIOS interrupt and
used interrupt servicing. Lots of comm programs simply internalized the
serial i/O driver code, just like the screen display code.
No big deal
--Chuck
On 5/28/24 16:29, ben via cctalk wrote:
True, but serial IO was never fixed to my knowledge to use interrupts. On 2024-05-28 1:23 p.m., John via cctalk wrote:
Do you mean like MSDOS (later functions use file handles, not FCBs)?
Been like that since about DOS 2.0...
--Chuck
So what, then, consitutes a Real Operating
System, and why?
I am grumpy about OS's like MSDOS, in that programs kept by passing
DOS to handle screen, and serial IO.
I also favor OS's that don't require one to build a file control block.