Closed Promise SuperIDE DISK ACCELERATOR

[sprcorreia]

Selling my old ISA PROMISE DC-100 CACHING DISK CONTROLLER with I/O expanded with 2MB of CACHE RAM.

Perfect for a 286/386/486, supports up to 8MB of CACHE RAM (2 x 4MB 30 pin SIMM, tested).

Tested with an old HDD and 1.44MB floppy drive, serial port is working fine too.



I'm asking 40 euros (was 50) + p&p, bank transfer, paypal gift or regular, buyer pays fees.

 

[firage]

Can I ask out of curiosity what kinds of linear read speeds these things get?

 

[sprcorreia]

Top transfer speed (it's in the back of the box) it's 5MB. Controller has a fast cpu too (186-12MHz) considering the year.

I can do some bench tomorrow but i think the limiting factor will be the HDD because those old small size drives were really slow.

 

[kixs]

Perfect for a 286/386/486, supports up to 8MB (tested).

Is this a typo? I'd guess you meant up to 8GB in size. At first I thought you meant 8MB/s transfer rate but your last post says it's 5MB/s.

With generic ISA I/O controller I get transfer speed from 2 to 3MB/s on a 386DX-40 (depends on ISA bus divider set in BIOS) and using CF2IDE with 8GB Sandisk Ultra card (measured with Checkit 3) - clean DOS boot with pressed F5. Sandisk card has 15MB/s read speed via USB 2.0 on a newer system

If 5MB/s is real transfer (non-cached) than it's very fast

 

[demolition]

Perfect for a 286/386/486, supports up to 8MB (tested).

Is this a typo? I'd guess you meant up to 8GB in size.

Maybe he means 8MB cache memory, i.e. 2 x 4MB SIMMs?

 

[kixs]

Yeah... read the whole post again. 8MB cache size must be it :roll:

 

[sprcorreia]

Yeah... read the whole post again. 8MB cache size must be it :roll:

Yes, I have expanded the card with 2 x 1MB and the maximum is 2 x 4MB, so 8MB of CACHE.
Edited post to clear the doubt.

 

[firage]

That 5 MB/s is probably the peak burst from cache to memory at the max rated 16 MHz ISA clock, I would imagine. If it achieves half that in Speedsys at more usual clocks it's pretty sick for an old card.

 

[sprcorreia]

Bump and price drop.

 

[kixs]

Interested. PM later.

 

[sprcorreia]

Please close, no longer for sale.