How to slow down the bus speed ?

People laugh at me when I dumpster dive or pick old PC's out of the trash and take them to my warehouse. I still have customers who are running DOS. The proprietary software they have won't run on modern systems. I have seen some software for the avid overclocker crowd that allows all sorts of adjustments to motherboard buss speeds that could be useful to you but I have not used any of it. You may have to bite the bullet and cruse the thrift stores and recyclers to find suitable hardware.

"Command line", never forget.

Hmm, is it possible that the software you're using has the problem and not the hardware? I do remember back in the Turbo Pascal days of using the Delay function. It used CPU counting, that program would fail on faster machines because it would over flow .

You could call it built in obsolescents. The fix was, I wrote my own CRT unit and used the tick timer window.... If you know the programming sequence to the programmer, I'm sure it would be simple to whack out a program to dump a bin file to the programmer. I suspect that the software you're using must be using a delay loop when communicating with the COM/Parallel port. Because that was a common thing back then.

Jamie wrote:> I suspect that the software you're using must be using a delay loop

Andy writes: It says SPECIFICALLY in the manual that it cannot be used with bus speed of greater than 8 Mhz.

While I know it is possible to trace out the circuit and write a program that will run thru a printer port to simulate a low speed computer, I have retired and am too damn lazy to start a project like that from scratch..

I just want to see if there is a way to load a "MODERN" program with a patch that will automatically provide a couple of hundred wait states after each instruction and allow the effective bus speed to be below 8 Mhz.....

Yeah, I know,..... but I am too damn old to be smelting my own ore to get the metal to build a screwdriver......

Thanks , tho, for your post...... My background is both hardware and software, but I don't have the enthusiasm to pursue the building of new tools anymore... Hell, I'd probly just use flint arrowheads if I could get away with it... ... which is why I don't just pay $500 for a new programmer that will replace the one I have.... :>)))

Andy

I have an old ISA bus device programmer as well. I haven't had an ISA slot to plug it into for some time now. My new programmer is USB2, it cost me about U$200. Decide whether to support antiques, or support newer stuff.

Wait states are set in CMOS Setup. AFAIK the most ever available is 3.

Here's what AMD has to say: