3 Mar
2003
3 Mar
'03
12:58 p.m.
On Mon, 3 Mar 2003, Brian Heise wrote:
I am curious if anyone ever had one of the Legacy
Enhanced Floppy
Controllers for the PCjr, was ever able to duplicate one, or know if
"have?" no
"ever had" yes
I sold my Jr's a few years ago. But the guy who bought the one with the
"Legacy" board brought it back to sell it at VCF last year.
it was ever possible to modify the current controller
to take on a
1.44mb capacity.
I have a Racore unit with a modified 3.5" 1.44mb drive that acts as
720kb, and is fantastic, but would love that extra storage space if
available!
720K does not require any modification. See also, the PC-JX (never sold
in USA)
Using a 1.4M drive for 720K usually doesn't require any mods.
But getting 1.4M to work on a JR poses some problems.
The STOCK controller for the Jr. would need a minor hardware mod to get
the 500K bits per second data transfer rate.
And the stock controller does NOT do DMA. Can you write the code tight
enough to do the data transfer through the CPU at "high density" rates?
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com