[ros-kernel] 16-bit dos

[Robert Köpferl]

What you think of is a Hardware limitation (as allways) of the ISA-bus. 
The x86-Processor was allways capable to handle 256 ints (IVT). The 
ISA-bus holds int wires while the 16-bit incarnation has 16 wires, the 
old 8-bit version has only 8 of them.

Andrew Greenwood schrieb:

> You'd be surprised actually... Even the shop I work in uses a DOS-based 
> sales system.
>  
> I thought there were 16-bit IRQs? I remember reading something about 
> them, maybe it was 0 - 7 were 8 bit and 8 - 15 were 16 bit. Can't really 
> remember though...
>  
> 
>     ----- Original Message -----
>     *From:* Casper Hornstrup <mailto:chorns at users.sourceforge.net>
>     *To:* 'ReactOS Kernel List' <mailto:ros-kernel at reactos.com>
>     *Sent:* Thursday, March 25, 2004 8:13 AM
>     *Subject:* RE: [ros-kernel] 16-bit dos
> 
>     Not impossible. Just not worth the trouble.
>      
>     Btw. there is no such thing as a 16-bit interrupt.
>      
>     Casper
> 
>         ------------------------------------------------------------------------
>         *From:* ros-kernel-bounces at reactos.com
>         <mailto:ros-kernel-bounces at reactos.com>
>         [mailto:ros-kernel-bounces at reactos.com] *On Behalf Of *Stephen
>         Hodges
>         *Sent:* 25. marts 2004 07:46
>         *To:* ReactOS Kernel List
>         *Subject:* [ros-kernel] 16-bit dos
> 
>         I can't remember where or when, but I have observed some people
>         discussing how it was impossible for ROS to support 16-bit mode
>         programs. This is actually quite the opposite. In fact, wine has
>         the interrupt handlers already available on the current cvs in
>         wine\dlls\winedos.
>          
>         Has anyone already completed the 16-bit interrupts? I hope this
>         can be delivered for the next release.
> 
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