Interrupts and 8080
Hi all I wish to know how interrupts are handled, if at all, under CP/M on an 8080. On this system which I'm implementing CP/M, keyboard scanning is done on the Int 7.5, so a return address can be...
View ArticleWhy did this Acorn A3010 sell for such a high price?
Acorn A3010's generally sell for between £50-200 depending on quality, why did this particular example sell for a much higher price than the rest? I can't work it out, anybody have any ideas?...
View ArticleMaking a C64 power supply?
So I currently just scored a working first gen c64 with box and cover for $45. It does not include the power supply and the power supply would cost more than the entire machine. So I did some research...
View ArticleWTB: Assembled XT-IDE ($ or trade)
Finally getting a 5150, I'd like some easy-to-interface-with-modern-media storage for it. But I suck at surface-mount soldering, and I'm too impatient to deal with soldering anyway. :D Anyone have an...
View ArticleFloppy drive questions
I keep an old Pentium machine, running XP, on my bench for when I need an RS232 port, 3.5" FDD, etc. It occurred to me, this morning, that it might be a good idea to add a 5.25" FDD to it, so that I...
View Article386 AMI BIOS Optimization
I'm attempting to optimize the 1993 AMI BIOS settings in my no-name (possibly Seritech) 386-40 w/ FPU motherboard. There are two settings in the 'Advanced Chipset' area that I don't have information on...
View ArticleWanted: Commodore PET 2001N Motherboard
I am looking for a motherboard for a Commodore PET 2001-N. I have the 32K one but it is damaged beyond repair. Thanks!
View ArticleShopgoodwill 386sx laptop and Fluke multimeter
Few things that I found today, check shipping to your location:confused: they can be surprising. 386sx laptop by Intra http://www.shopgoodwill.com/auctions...-32991780.html 386 pen computer by Sanyo...
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I have the secret chip!!!
Ok, so... this is how my brain works. I was cleaning up some stuff and trying to figure out what I wanted to get rid of, and came across this huge networking card that I have from IBM. Apparently, this...
View ArticleTi-74
I have 4 for sale, all for one money. One in the box with manuals. Will also include a TI-55II in box with manuals $20 plus priority mail shipping to your location
View ArticleHello from southern California
Hi all. Seems a bit quite in these parts so I just thought I'd say hello.
View ArticleA suggestion. for PMs
I'm getting a little tired of receiving a PM from someone whose inbox is full. There's no way for me to tell the sender that I can't reply. How about the forum software telling a user via email that...
View ArticleKN-S4-1 sleep mode or?
Hi I have a KM-S4-1 which i have had to battle with to get working. I seems to power down or sleep at random times, but especially when starting to read the hard drive (as far as i got with it). I have...
View ArticleIBM Personal Decision Series
So I acquired a NOS copy of IBM Data Edition, part of the Personal Decision Series. I'm just wondering if anyone has seen or has the pieces that supposedly go on top of this; Reports+, Graphs, Plans+,...
View ArticleAST Premium 286 Model 140 keyboard failure
Hi all, I'm getting 2 short beeps when starting up my AST 286. http://www.bioscentral.com/beepcodes/astbeep.htm says it's "The keyboard controller has failed" whereas...
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Memory Chips
I found some old memory chips and wondered if anyone wanted them, I hate to throw anything away.chips 001.jpgchips 002.jpg Attached Images chips 001.jpg (80.6 KB) chips 002.jpg (74.3 KB)
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Sick SuperPET
Hi, I picked up a SuperPET with some problems. It has a 8032089 Universal Dynamic PET motherboard (click on any of the images below to enlarge them). When started in 6809 mode, sometimes I get the...
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Help identify an unusual Quadram board and a CHIPS "SPEGASYNC"?
I got a box of ISA cards recently. Most of them are pretty easy to identify, but two have me stumped. One I can find vague reference to - a Chips & Technologies "SPEGASYNC" - everywhere online...
View ArticleLooking for advice on expanding a collection
I want to expand my collection of vintage computers, I use them for a display I have on an office wall. The difference is that I am really only interested in the physical machines, I dont care if they...
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