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EDIT: Mistake in the topic and can't edit, it's 128 KB / 1 Mbit. In my absurd quest for a 20 MHz overclocked XT clone, my 70 ns RAM is holding me back and I'm stuck at 15 MHz! Going to 16 MHz makes goofy things happen, and beyond that it won't POST. I have a 16 MHZ rated V20 already so it's...

Looking for a 16 MHz rated V20. I'm having trouble keeping a 10 MHz one stable beyond 15. There are some cheap ones from China on the bay, but I'm not sure if I trust them to be real...

I have this clone board, I've had it forever. I have never been able to get it to go into turbo mode! Topbench reports 4.77 mhz no matter what. The jumper has no effect. Ctrl-alt-plus or -minus have no effect. I even tried manually toggling bit 2 of port 61h high. The bit goes high, verified by...

This is a thing that I've wanted to do for a long time! I ported Alex Barton's ngIRCd software, which is a lightweight, RFC-compliant (plus some extras) IRC server, over to 16-bit DOS using Open Watcom and mbbrutman's mTCP stack. It runs on any 8088+ PC with enough RAM. It was of course written...

Would anyone else find a piece of software like this useful? I've been experimenting with the idea of an int 13h network disk driver layer via UDP and am wondering if I'm the only one who would find it useful? I have more old PC's than I have hard drive controllers, plus there are old laptops...

I've got a 10 MHz XT clone board with a V20, not sure of the brand. It's a later model that seems to be more integrated than most, and it's not very large. Anyway, lately it's got a strange issue where it always throws a KB error on post, yet the keyboard works fine. It happens with any...

I'm looking for a good 8088 or 286 laptop, ideally with a working hard drive. It doesn't have to be mint, but I'm not looking for something that's been beat up either. A few scratches and minor yellowing is fine with me! Chips out of the plastic and missing screws are bad. Sometimes these...

Hi everyone, I haven't been around here much in quite a while! I see both a lot of familiar names still posting, and some new so I'm glad to see the forum is still alive and kicking. :) I'm porting a piece of network software from *nix to real mode DOS using Open Watcom and the Watt32 lib. It's...

Hi all, does anybody know of any software that can do thorough tests of chips like the 8253, 8259, 8255, 8237, etc? And that can run on an 8088 or 80186? Something that really tests out all or at least most of their functionality. I started writing a new XT-class PC emulator to address the...

Hi all, VERY long time since I've posted here. I see a lot of both old and new names on the VCF! This isnt about programming FOR a vintage computer, but I didn't know where else to post this. As the title says, I think I need some help tracking down a bug in an 8080 emulator that I've been...

I've got this Orinoco Gold card, I'm trying to get it to work in my old Canon Notejet 486C. I've got the CAD driver loaded. Unsure if I'm using the right settings. The PD seems to communicate with the card if I use 0x300, IRQ 11, mem 0xD000. Although I don't know if those values are correct for...

http://www.ebay.com/itm/Ultra-rare-Commodore-65-C65-DX64-prototype-working-serial-22-/171673209321?nma=true&si=S3sWF2JVSFaZFDcin1Ddu6376FE%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 Wow! What else can I say? :eek: There's a new car...

Just got a nice working 5155 by way of eBay. I feel inadequate in my nerdliness right now, because I can't seem to find an obvious way to get the case off. What do I have to do here? Is there a trick to it, or am I as dumb as I think I am?

If anybody is interested... I've been writing a disk cache utility called Intellicache, and I'm looking for testers. The way this one works is that it keeps a number of multiple cache buffers in memory. By default, 16 caches of 2 KB, you can modify this on the command line. use icache.exe /...

I'm working on a TSR project in Turbo C++ that involves hooking int 13h. I moved the old int handler to int FDh. There are several functions I intercept, but the rest get passed through to the old handler. Every program I've tried works so far, except for DEFRAG.EXE. It hangs at the drive...

I don't know if these are still being produced new, I suspect they're not, but does anybody have any working XT-IDE cards they would sell? I've got an IBM 5155 portable coming from eBay and I would love to outfit it with a (modernish) hard drive. I only have one card, it's one of the original...

EDIT: Please delete, wrong subforum - sorry!

I picked up this nice little 1999 Mustang GT 5-speed to celebrate getting a new job... that and I was tired of driving around somebody else's car. New remanufactured Ford motor from last year! 3 yr/100k mile warranty on that. 110k miles on the rest of the car, runs great. Sounds good, has an...

Just did this for a (time-consuming) laugh. I made an 8086 PC emulator in 100% pure VB6. Terrible, terrible language to try this but it's just "for the lulz". I just wanted to see it happen, since it hasn't been tried before that I know of. There seems to be a few CPU bugs that I think are...

I started writing a compression tool for 16-bit DOS based on the FastLZ algorithm ( http://fastlz.org )... The library source had to be slightly modified to work on a 16-bit target. (It was assuming ints were 32-bit.) Anyway, I've got an early proof-of-concept compressor and decompressor. It's...