Personal Computer Museum, Canada's Videogame Museum

Cordata PPC

Cordata PPC

Speed12 MHz
Memory512 KB
Hard Drive20  MB

What's this?

Release Date: 1/1/1987
Manufacturer: Cordata
Donated By: William Morris
This is one of those rare machines to come along that not too many people know about. We *think* it's an XT portable machine with a 9" screen but we're not sure on the speed. The model # (PPC-400-25) suggests that perhaps it's a 25 MHz machine but if it is, it's probably not an XT.

The machine uses a Seagate 20MB hard disk. Although the screen is monochrome it's actually a CGA graphics adapter built in.

If you know more about this machine, please contact us.

User Comments
John Miller on Monday, April 21, 2014
Trying to get my old Cordata/Corona computer to boot up after all these years. Screen comes on and memory test is successful ... yet, get message of "disk boot failure" ... computer goes to "A" drive .. but will not complete boot. I have the 5 1/4 inch DOS disks that it came with. Not sure if the problem is the DOS disk or the floppy drive not reading the disk. Any ideas? Anyone have a disk for booting? I have plenty of blank/formatted 5 1/4 disks so you could make me a copy. Also have a lot of other 5 1/4 software. Can also contact me at
Patrick Devine on Thursday, April 03, 2014
I had on of these machines in the 1985. It was a 4.77Mhz 8088 XT computer, which I eventually upgraded to having an NEC V20 chip to boost the speed. I seem to remember the graphics were monochrome CGA, but it had an absolutely fantastic font in text mode. It came with a 5 1/4" floppy drive, as well as a Seagate ST225 20MiB RLL hard drive which if you replaced the RLL controller with MFM you could get 30MiB out of it.
Mike Yarrow on Sunday, June 30, 2013
I worked for Corona Data Systems from 1983 to 1985 in their factory in Westlake CA. I worked on the assembly line and then was promoted to the lead assembly foreman. It came standard with 128K of memory and could expand to 512K by filling in 3 rows if IC memory chips. No hard-drive or mouse. I was there when it went from DOS to MS-DOS operating system. It cost about $2,500.00 with 128K and about $3,200.00 with 512K. I remember when it ran at 1 MHz and then it got 10% faster by going to 1.1 MHz. Corona Data Systems, at first, only had a desk top version, then the portable version was produced later.
John Miller on Saturday, June 15, 2013
I'm trying to locate the 3.6 v battery for the calendar clock in my old Corona PPC-400 ... Can't spot it inside .. and the schematics are not helpful in physically locating it. I want to boot it up .. and am concerned that the old battery is corroding things.
Joe Jiampetti on Saturday, February 09, 2013
Man i was too cool for school when i brought this home in 85! wow a real computer in the home with a printer no internet but you could do your taxes on it write a letter, accounting etc. those floppy disks were for file storage
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