I believe USB parallel port adapters were made only good enough to support
printers. There are some signal lines that you don’t have access to control
over USB compared to a native parallel port.
There was a project that used a USB parallel port and USB serial port together
to combine enough control lines to do what a native parallel port can do. But
that was focused on manually controlling the lines with software. I don’t
believe there was a driver to have it emulate a native parallel such that you
could use dos/windows drivers with a parallel port device driver like a tape
backup or Zip drive for example.
Sent from my iPhone
On Jun 12, 2020, at 8:17 AM, Lennart Sorensen <lsorense@xxxxxxxxx> wrote:
Would a USB parallel port adapter work on a PC? They were among the very
first USB devices that came out as far as I recall.
On Fri, 12 Jun 2020 at 01:02, Dan Gahlinger <dgahling@xxxxxxxxx> wrote:
Ian, I found the missing piece!
finally now it makes sense!
see attached
so the DB15 of this cable goes to the 1541 parallel cable
and the card edge of this cable goes to the card edge of that weird adapter
Then the IEC of that weird adapter goes to the 1541 serial port as normal
The DB25 of the weird adapter goes to the PC parallel port
So that makes a parallel connection with the serial for control.
Now the problem I have is, you can't get parallel ports on PC's any more
Well, it's a nice piece of history anyhow
thanks!
Dan.
On Thu, Jun 11, 2020 at 11:31 PM Ian Colquhoun <icolquhoun@xxxxxxxxx> wrote:
The 25 pin side plugs into a PC's parallel port. The IEC port connects to
IEC on the disk drive. The card edge connects to a parallel port installed
in the 1541 or 1571 via a cable. I have a cable with card edge on one end,
and a 15 pin D-SUB on the drive side. You need both the parallel and IEC
connections to the drive for parallel transfer speeds to work.
I guarantee that this is either an XEP1541 or XMP1541. I have one just like
it.
On Thu, Jun 11, 2020 at 11:14 PM Dan Gahlinger <dgahling@xxxxxxxxx> wrote:
but it has a 25 pin adapter, not 15 pin.
so there's no way to plug a 1541 parallel connector into it.
I have a cable with IEC at one end and 25 pin card edge (female) at the
other,
I was thinking that would connect to this,
so you'd connect a PC parallel to the DB25 on this one,
that seems awfully convoluted...
I mean, it'd make more sense to plug the IEC into the drive and the DB25
right into the PC parallel
But the IEC is serial
Dan.
On Thu, Jun 11, 2020 at 11:07 PM Ian Colquhoun <icolquhoun@xxxxxxxxx>
wrote:
That is either an XMP1541 or an XEP1541 adapter almost for sure.
http://sta.c64.org/xcables.html
On Thu, Jun 11, 2020 at 10:49 PM Dan Gahlinger <dgahling@xxxxxxxxx>
wrote:
definitely some sort of drive adapter (I'm almost certain),
unless it's some sort of serial adapter
no markings, no (c) no writing at all.
it's just wiring, some diodes, so it's a simple connector
On Thu, Jun 11, 2020 at 10:44 PM Aaron Hamilton <aaronster@xxxxxxxxx>
wrote:
I thought it was some kind of printer parallel port.. but then I found
this video for a cassette drive adaptor
https://youtu.be/9q1KbPddxms
Aa
On Thu., Jun. 11, 2020, 10:32 p.m. Dan Gahlinger, <dgahling@xxxxxxxxx>
wrote:
it's some sort of commodore drive adapter,
but I've long forgotten what it's for or where I got it.
thanks
Dan.
--
Ian Colquhoun <icolquhoun@xxxxxxxxx>
--
Ian Colquhoun <icolquhoun@xxxxxxxxx>
--
Len
