[Coco] Booting OS9 on my CoCo 3
dave at davebiz.com
Tue Aug 8 03:11:22 EDT 2017
Ok, so it's been a REAL long time since I booted OS9 on my real CoCo 3
from a floppy disk. Like almost thirty years. So I picked up a used
FD501 controller from eBay awhile back and I just now hooked up a 3.5"
floppy to it. I can format a floppy and I can save/load programs from
it. But when I try to boot an old disk (probably 30 yrs old) I get the
familiar "OS9 BOOT" screen and then the floppy does a seek at what
sounds like a faster step rate and then it does nothing. Frozen with
"OS9 BOOT" on the screen and the floppy is still selected with the motor
This is a very old boot disk that I labeled "OS9 Level II System Master
with ramdisk". My old setup was a CoCo 3 with 512K and a multipak and
one of the old full-size floppy controllers and an RS232 Pak. My new
setup is a CoCo 3 with 128K, no MPI, the FD501, and a 63C09.
I've got some 5.25" OS9 disks too but I don't currently have a 5.25"
drive so I'm hoping to get things worked out with the 3.5" drive. It may
be that the floppy is just so old it's lost some of its retentivity but
I just thought I'd put it out there to see if anyone has an idea. Maybe
I'm missing something obvious. The FD501 does not seem to work at
hi-speed. Could that be the problem?
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