[Coco] Drive Wier 3: WARNING!
exwn8jef at gmail.com
Wed Mar 25 10:31:52 EDT 2009
I will let you guys know how my USB to Serial adapter works as soon as I
get my DW3 ROM and cable. Thanks to Boisy, I chose one with the FTDI
N8WQ - Canal Winchester, Ohio
Boisy Pitre wrote:
> Thanks for taking the time to make your post and sharing your findings.
> I want to echo what Tim is saying: there are some USB<->Serial
> adapters that will mostly work, but not flawlessly with DriveWire 3.
> There have even been cases where real PC serial ports failed to work
> There's no hard and fast rule as to what will work or what won't but
> apparently some ports are more tolerant than others.
> Boisy G. Pitre
> Mobile: 337.781.3570
> Email: boisy at tee-boy.com
> Web: http://www.tee-boy.com
> On Mar 24, 2009, at 8:21 PM, Tim Fadden wrote:
>> Ok, now that I have your attention! :-)
>> I purchased an hdb-dos rom chip and serial cable from Cloud-9. Ha
>> yoo, it worked perfectly as advertised.
>> My main reason for wanting it was in order to back up my coco os9
>> hard drive system, and to make real floppies from images.
>> The initial boot to os9 from DW3 worked flawlessly.
>> I then created a new boot floppy from the drive wire image. When
>> booting the system from the floppy, it would immediately crash upon
>> accessing any of the /x# drive wire virtual disks.
>> Boisy Pitre and Robert Gault had this bug found and fixed in two or
>> three days! yahoo Now I can boot from a floppy, and access the three
>> floppy drives, my hard drives, and the DW3 drives.
>> I set off to do a backup. Looked like it was working until in the
>> morning when I checked the result. Oh Oh! dsave got out of sync
>> Whats this?
>> Making a long story short, I was getting read/write errors on the DW3
>> disks. This was verry spiratic. only 3 to 5 random errors in 71 MB
>> of transfer.
>> After several days of testing, and eliminating possibilities I found
>> the problem!
>> The USB to Serial adapter was loosing data! The 20+ year old
>> hardware was working perfectly, DW3 was working perfectly!
>> After going to a true RS-232 port on the pc, I have been able to do 3
>> complete backups with 0 errors.
>> That is a total of about 210 mega bytes, and over 21 hours of data
>> transfer! I have tested transfers from HD to DW3, and visa versa.
>> Bottom line is; if your using a usb-serial adapter and want to make
>> 100% sure you getting clean data do a lot of testing!
>> I don't know if it was the usb-serial module, or the drivers for it.
>> It may be the individual module, or the chip set on it (prolific).
>> As for me, I am sticking to a true RS-232 port.
>> Any how its a hoot that the newest piece of technology was the one
>> causing the problem!
>> Thanks to all that helped me sort it out.
>> Tim Fadden
>> Coco mailing list
>> Coco at maltedmedia.com
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