OpenEuphoria

Re: asm, PORT instruction, etc

• Posted by Brian Broker <brian_broker at yahoo.com> Aug 06, 2005
• 513 views

Kat wrote:
> 
> On 6 Aug 2005, at 1:44, Brian Broker wrote:
> 
> > 
> > posted by: Brian Broker <brian_broker at yahoo.com>
> > 
> > Kat wrote:
> > > 
> > > On 6 Aug 2005, at 0:30, Kat wrote:
> > > 
> > > > 
> > > > Has anyone done a demo of using the x86 cpu port i/o instructions for
> > > > isa/pci buss controlled stuff?
> > > 
> > > Didn't Robert (Bob) Nalley do this? His Eu program isn't in the archives,
> > > i
> > > thought i had it. Bob, are you still here?
> > > 
> > > > Has anyone done a x86 device driver, preferrably in regular Euphoria? Or
> > > > asm
> > > > on Eu? 
> > > > 
> > > > Can i see it?
> > > > 
> > > > Kat
> > > 
> > 
> > Looks like he submitted a tool that crops a bitmap picture to fit inside a
> > certain area for DOS back in '99.  A EUforum search comes up empty.
> 
> He had webpages at 
> geocities.com/SiliconValley/Garage/1288/software_8255.html 
> 
> but they are down now.
> 
> > Can you provide more specifics on what you'd like to do?  What platform are
> > you
> > working on?  Providing more details might get more responses...
> 
> For the OS: winxp, win95, and msdos(v5+ to v7). 
> 
> (OS dependant) I need a TSR device driver that will present itself as a
> harddrive to
> the 
> OS when it's installed. Must work on winxp and dos. This also needs a way to
> talk to
> 
> an ide harddrive, either plugged into the mobo or on a pci card.
> 
> AND/OR
> 
> (OS independant, preferable) I need a device to plug into the IDE cable as if
> it were
> a 
> harddrive, but be a device totally under my control <hideous cackle>, which
> would
> present itself to the OS or bios as a normal harddrive, but into which i can
> plug
> standard motherboard memory simm/sip/modules of the ddr(x) variety to be the 
> "platters" of the harddrive. 
> 
> Why? It's a secret, sorry.
> 
> No, i cannot use a regular ramdrive for this. No, i do not wish to use flash
> memory.
> 
> No, i do not wish to use flash cards, usb, etc.. 
> 
> Yes, i know this thing will forget everything when power is removed.
> 
> Kat

As an EE kinda guy, I'm intrigued. However, I don't think it will be as easy as
wiring your RAM to your IDE bus as it seems that you propose.  However, if you
could scram an I/O board from an old HD that you have the specs for, you should
theoretically be able to use the standard IDE driver to communicate with it. 
(basically, a mostly-H/W solution; still driver tweaks may be necessary)

Just a thought, but all I can say is: good luck!!
-- Brian