[Coco] Preserving old CoCo diskettes...

[Mark Marlette]

Gene,

It appears that Roger T. has your fix. You can get an enhanced NitrOS-9 6551 driver from him.

When it has cleared the Heskett test bench, let me know what your benchmark results are. We performed some benchmarks at the fest on Friday night. Boisy also had some slides on theoretical throughput calculations for the CoCo3. I don't recall the exact numbers......Boisy??????

I'll report our test case and numbers, we did benchmark others.

Test case:

Boot NitrOS-9

load megaread

date -t;megaread </x0@;date -t

DriveWire3, 120 seconds.
SuperIDE with SD card adapter and SuperDriver v2.1, 22 seconds.
SuperIDE with CompactFlash and SuperDriver v2.1, 18 seconds.
TC^3 SCSI with a FAST SCSI drive and SuperDriver v2.1, 12 seconds.

Can't help it, we are Engineers and love to look at the data/facts.

Regards,

Mark
Cloud-9

----- Original Message -----
From: "Gene Heskett" <gene.heskett at verizon.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Tuesday, May 18, 2010 10:22:50 AM
Subject: Re: [Coco] Preserving old CoCo diskettes...

On Tuesday 18 May 2010, Mark Marlette wrote:
>Gene,
>
>Read the errata on the 6551. This has been discussed before. You decide. I
> know what your conclusion will be....You already said it.
>
>Regards,
>
>Mark
>Cloud-9
>
The errata I have on the sc6551 is far from complete.  Half a page and what I 
am seeing isn't mentioned.  Do you have a better src, or even a src for fixed 
chips?

If you have the time, send it to gene.heskett at gmail.com.  The vz address will 
be historical in 2 or 3 days, I'm voting with my wallet and feet for 
dependable phone service from the local cable, and at reduced cost for 2x the 
dsl bandwidth.  Something I haven't had from verizon for about a year.

Thanks Mark.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Hackers are just a migratory lifeform with a tropism for computers.

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