Type 3 Errors

Well, I said that I wasn’t having any trouble after upgrading the 68LC040 to the 68040, but I’m starting to see some trouble. I’m getting a number of Type 3 errors when trying to run programs like Netscape 4 and Quicktime 4. Most programs I had been using still seem to work just fine, but the consistent failure of several programs makes me concerned that my upgrade is not entirely stable. I’ve been able to work just fine without these programs so far, but I may desire to use them at some point, so I’ve got my original 68LC040 CPU set aside just in case.

In the meantime, I am enjoying using Think Pascal. It’s pretty cool to go back to a language I only tinkered with in my youth. I’m amazed at how much you can do with Pascal on the old Mac. I’m glad I picked up that Pascal textbook the School of Computing threw out several years ago. :) Read More ›

Replaced the 68LC040 with a 68040

Over the holidays, my brother brought up my old Centris 650 which I promptly cannibalized for the sake of my P640CD (DOS) box. I thought it would be better to have a real 68040 CPU instead of the value 68LC040 chip. My only concern was the fact that I was going to be running this 25Mhz 68040 at 40Mhz. That was a bit more of a stretch from the 33Mhz 68LC040 running at 40Mhz. I’m pleased to report that the machine seems to be running quite stable with the new chip. I used some good heatsink compound. The only problem I’ve had is that Netscape 4 is crashing now. This seems to be the only app affected right now. Read More ›

The Best of Both Worlds

I installed MS-DOS 6.22 and Windows for Workgroups 3.11 on my new Performa 640CD machine. It was a great trip down memory lane. It had been some time since I had seen a true DOS prompt and even longer since I had seen WFW 3.11. I was finally able to install Tie Fighter! It runs great on the little 486 PC built into this great machine. Sound and video both work great, and I’m waiting to dig up an old PC joystick so I can really play the game like it was meant to be played. I was also able to get two other great DOS games to run – Scorched Earth (Scorch) and Stunt Island. Both ran just like I remembered them. It was a great feeling to fire a crazy bomb at the computer tank across the screen and take my Cessna 172 for a spin around the island.

The more I play with this whole DOS compatible Mac, the more I’m amazed by it. It’s just remarkable how well engineered it was. I can share the Mac’s modem port with the PC as COM1 or COM2 and use my ADB-powered Mac Supra Modem from software on the PC, such as Telix. Not only that, but I can use the Mac’s ethernet card as a network adapter on the PC side! Apple provides drivers for DOS/Windows that allow you to share the Mac’s ethernet card and connect to your Windows / Netware network. I’m truly impressed.

Anyway, I’m definitely going to keep this machine around as it is truly the best of both worlds! Read More ›

Ahoy! magazine from 1986

A friend of mine recently gave me an old magazine he found as he was cleaning out his house. It is the August 1986 issue of Ahoy! magazine, a magazine for Commodore users. While I was too young at that time to be an Ahoy! reader, I very much enjoyed taking a look back at the history contained in this old magazine. There were articles about BASIC and assembly language programming for the C64 and C128 as well as an article on the new Amiga 1000! I was particular amused by an ad for SEXTEX, “The nation’s leading erotic computer communications network.” It’s really sad, but I somehow find it interesting how “adult” entertainment goes back so far in the history of computing. $12.95 apparently bought you a lifetime membership to this service. “Call or write for your FREE brochure – your computer will never be the same.” Indeed. Read More ›

Even More Mac overclocking!

When you fill your office with vintage Macs, your co-workers might get the impression you collect them. Last week, a co-worker of mine brought me a Performa 640CD (DOS). Because this is one of the few DOS-compatible Macs made, I was glad to add it to my collection. After my initial inspection, I decided almost immediately to clock-chip it. It had a 68LC040 CPU running at 33Mhz. After consulting Marc Schrier’s excellent clock-chipping resource page, I found that I only needed to move two surface mount resistors on the logic board. I did this quite easily with a nice soldering iron. When I reassembled the machine, it almost completely booted the first time. I had to go back and add a heat sink I pried off of a Pentium 200 chip. Now, I have no instability. I installed DOS 7.1 on it and it’s running well. I want to replace the DX2-66 486 chip with a 100Mhz 486, but that may add to the heat too much. Add one more overclocked Mac to my collection! Read More ›