Solved

isa expansion tree or cable box

Posted on 1998-04-21
3
363 Views
Last Modified: 2011-10-03
I am refering below to 16 bit isa slots.

Does anywone sell a cable that will plug into an isa slot and then end up outside the computer in a box that will accept isa cards- 4 slots preferable.

or is there an adapter for a pci slot that will allow an isa card to plug into it?

or can I make one if i carefully solder a flat cable in par
allel with a scavanged isa male connector and a scavanged
array of slots from an old mother board?  

Am I right that the isa slots on mother boards are all in parallel?

Is there a limit to how many of these slots a mother board could recognize?
0
Comment
Question by:fhazelwd
3 Comments
 
LVL 3

Accepted Solution

by:
jlove1 earned 50 total points
Comment Utility
It IS possible to "make one ISA slot into many" but there's the issue of  impedance. with the added wire and load, the impedance would be too high in most cases.  I think the spec for the ENTIRE BUS length is under 22 inches.

As far as the ISA to PCI converter you're mentioning...That's just about impossible: Not not impossible, but pretty difficult at best.

The first problem is that the ISA bus is at 8 or 16 mhz and 8 or 16 bits. The PCI bus runs at 33mhz (in a PC) and 32 bits (in a PC). That right there, in combination with the issue of bus mastering and other things, make's it too complecated of an issue to even direct worry with. Especially since you'd ALMOST DEFINATELY need to rewrite all the software and drivers to talk to the card.

Just probably not worth the time.
0
 
LVL 5

Expert Comment

by:JBURGHARDT
Comment Utility
Yes,there is box with isa cards and card that plug in you computer it look like desktop with own power supply.
Let me find more info about it?
0
 

Author Comment

by:fhazelwd
Comment Utility
That's exactly what I wanted to know. One more thing.
Are the Isa slots wired in parallel and if make my own
would I have to count the ribbon cable I would use as part of
that 22 inches. Also, How long is the bus on mother boards now on average.  Also, would I need to wire ever terminal on a slot
if you know what post numbers on the slots are used in general
please let me know or where I could find a schematic.  I have increased the points to 100 and will increase the points more if
you can answer these.





0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Upper back Pain: My back hurt for months. Upper back, mostly my neck, spine and across my shoulder blades. I was getting headaches too, that felt like they were caused by tension in my shoulders, but now I feel fine! I'm sharing this hoping someone…
Moving your enterprise fax infrastructure from in-house fax machines and servers to the cloud makes sense — from both an efficiency and productivity standpoint. But does migrating to a cloud fax solution mean you will no longer be able to send or re…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now