A full line of semidisks...
Written on August 28th, 2026 by Tech Ads
[expand]
Page 1
A FULL LINE OF SEMIDISKS
Fanwewnn cnet Sconces
wer ance
“8 awe sennve
Load tnatntat editinctetindnatcdatt edkate teeta t te ee ee ee ee eee
ee aN a en
On ab ne ea ah EP ee hl RE Oe, eee, Sig De Ret Rae Me ON a Rs oe een a eRe ean a
Bae Sst x
itt
LAVUUNDAVAVOVA VOLUN OUDATATADA VAD iE
aa a ar ae
PA NE a iS a ee ee Re RE yg eed ee
ae
IBM Personal Computer
Do you use your computer? Or does your computer “use” you? Face it, if you re using floppies, your time is being wasted.
Because a floppy is an inefficient random access storage device. Each time the processor wants to transfer data, it has to wait
an eternity for the disk to rotate and the head to move.
So what do you do? Get a SemiDisk, quick. It’s a large capacity semiconductor memory board that is driven by software to
operate like a disk drive. Without all the waiting. Do everything you'd do on a floppy or hard disk, with no modifications to your
software or hardware. Two board sizes are available: 512K and 1 Megabyte. (the highest density microcomputer memory
board in the world) And you can put up to 8 megabytes in a system by adding more storage boards.
What do you need to use it? Just an S-100 system with CP/M 2.2. Or a TRS-80 Model 2 system with
CP/M 2.2. Or an IBM Personal Computer. That's it. No special processors, DMA, I/O, or disk controllers are required. Plug it in
and run the installation program, and you're on your way. Fast! Even better, we supply full source code to the driver software, in
case you d like to do your own interfacing.
Best of all, the SemiDisk’s price won't warp your wallet. Compare specs, cost/megabyte, storage capacity, and
compatibility with the competition. You'll see that the SemiDisk is a disk emulator truly worthy of the name. SemiDisk has
battery-backup capability, too.
Consider our limited warranty: A full year, covering all parts and labor. Consider our liberal 15 day return policy. Price?
$1995 for 512K byte SemiDisk, $2995 for 1 Megabyte SemiDisk. Bothfrom stock. $10.00 for manual. VISA, Mastercard, COD
orders accepted. Dealer and OEM inquiries welcomed. (Specify system type and disk format when ordering.)
Someday, you'll get a SemiDisk.
Cintil then, you'll just have to......... wait. \)
\
SemiDisk \.
P.O. Box GG
SYSTEMS Beaverton, OR 97075 (503)-642-3 1 00
Call (503)-646-5510 for CBBS®/NW, a Semi-Disk-equipped computer bulletin board. N 0 WA | T | G
SemiDisk trademark of SemiDisk Systems; TRS-80 trademark of Radio Shack
TM
Circle no. 168 on reader service card.
[/expand]
‘A full line of semidisks…’
The SemiDisk Systems’ SemiDisk was a range of hardware RAM drives for S-100, TRS 80, and IBM Personal Computers. Available in 512KB and 1MB capacities, the SemiDisk presented itself as a standard disk drive that a user could access files or applications from, albeit at a significantly faster rate than a classic disk drive. During system power downRAM content was retained via a card installed battery.
As-of January 1983, the 512KB variant was available for 1,995USD.
A positive review of the SemiDisk Systems’ SemiDisk was featured in Microsystems Magazine (January 1983). Other SemiDisk documents - including a product manual - can be found at Deramp.com.
Feel free to share!