I've been given some code to control a couple of stepper motors as part of my 4th year project. It's old code, and only runs on 98 and older due to its use of bios.h.

I need to make some changes to it, but my attempts to rebuild using Digital Mars give the following error during linking (compiling is fine):

Dualstep.obj(Dualstep)
Error 42: Symbol unidentified _outportb
Dualstep.obj(Dualstep)
Error 42: Symbol unidentified _inportb
Dualstep.obj(Dualstep)
Error 42: Symbol unidentified _delay

Any idea what this means? Unfortunately I don't know what compiler was used to compile originally, so that may be the problem ...

Hmmm.... seems the original code was compiled using
Turbo C 3.0
..



In article <clr6tt$2ln0$1@digitaldaemon.com>, Ben Barker says...
>
>I've been given some code to control a couple of stepper motors as part of my 4th year project. It's old code, and only runs on 98 and older due to its use of bios.h.
>
>I need to make some changes to it, but my attempts to rebuild using Digital Mars give the following error during linking (compiling is fine):
>
>Dualstep.obj(Dualstep)
>Error 42: Symbol unidentified _outportb
>Dualstep.obj(Dualstep)
>Error 42: Symbol unidentified _inportb
>Dualstep.obj(Dualstep)
>Error 42: Symbol unidentified _delay
>
>Any idea what this means? Unfortunately I don't know what compiler was used to compile originally, so that may be the problem ...
>
>

You'll need to change the code to using _inp, _outp and sleep.

See www.digitalmars.com/rtk/dos2.html and www.digitalmars.com/rtl/time.html


"Ben Barker" <Ben_member@pathlink.com> wrote in message news:clr6tt$2ln0$1@digitaldaemon.com...
> I've been given some code to control a couple of stepper motors as part of
my
> 4th year project. It's old code, and only runs on 98 and older due to its
use of
> bios.h.
>
> I need to make some changes to it, but my attempts to rebuild using
Digital Mars
> give the following error during linking (compiling is fine):
>
> Dualstep.obj(Dualstep)
> Error 42: Symbol unidentified _outportb
> Dualstep.obj(Dualstep)
> Error 42: Symbol unidentified _inportb
> Dualstep.obj(Dualstep)
> Error 42: Symbol unidentified _delay
>
> Any idea what this means? Unfortunately I don't know what compiler was used to compile originally, so that may be the problem ...
>
>

Thanks - I'll try that. (Sorry for the double post)

A couple of questions though. Delay() took millisecond input, wheras sleep()
takes seconds. Is there a way around this...

Also,

www.digitalmars.com/rtk/dos2.html

seems to be a dead link, although I'll try to find the intended page myself.

Cheers,

Ben


In article <clrhnv$546$1@digitaldaemon.com>, Walter says...
>
>You'll need to change the code to using _inp, _outp and sleep.
>
>See www.digitalmars.com/rtk/dos2.html and www.digitalmars.com/rtl/time.html
>
>
>"Ben Barker" <Ben_member@pathlink.com> wrote in message news:clr6tt$2ln0$1@digitaldaemon.com...
>> I've been given some code to control a couple of stepper motors as part of
>my
>> 4th year project. It's old code, and only runs on 98 and older due to its
>use of
>> bios.h.
>>
>> I need to make some changes to it, but my attempts to rebuild using
>Digital Mars
>> give the following error during linking (compiling is fine):
>>
>> Dualstep.obj(Dualstep)
>> Error 42: Symbol unidentified _outportb
>> Dualstep.obj(Dualstep)
>> Error 42: Symbol unidentified _inportb
>> Dualstep.obj(Dualstep)
>> Error 42: Symbol unidentified _delay
>>
>> Any idea what this means? Unfortunately I don't know what compiler was used to compile originally, so that may be the problem ...
>>
>>
>
>

Thanks  - that seems to have done the trick



In article <clrhnv$546$1@digitaldaemon.com>, Walter says...
>
>You'll need to change the code to using _inp, _outp and sleep.
>
>See www.digitalmars.com/rtk/dos2.html and www.digitalmars.com/rtl/time.html
>
>
>"Ben Barker" <Ben_member@pathlink.com> wrote in message news:clr6tt$2ln0$1@digitaldaemon.com...
>> I've been given some code to control a couple of stepper motors as part of
>my
>> 4th year project. It's old code, and only runs on 98 and older due to its
>use of
>> bios.h.
>>
>> I need to make some changes to it, but my attempts to rebuild using
>Digital Mars
>> give the following error during linking (compiling is fine):
>>
>> Dualstep.obj(Dualstep)
>> Error 42: Symbol unidentified _outportb
>> Dualstep.obj(Dualstep)
>> Error 42: Symbol unidentified _inportb
>> Dualstep.obj(Dualstep)
>> Error 42: Symbol unidentified _delay
>>
>> Any idea what this means? Unfortunately I don't know what compiler was used to compile originally, so that may be the problem ...
>>
>>
>
>