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Re: Not your father's Applicard - USB added
Alex Freed wrote:
4. U4 and U11 are not normally populated. This is expansion space that
I wired for a USB module and a GAL for glue logic. It can be used for
some other interface too.
what are your plans for this?
With all the payed for cards in the mail I got back to the one I made
for myself and plugged in the DLP USB module
http://www.dlpdesign.com/usb/dlp-usb245mv15.pdf
What's a good source for these in small quantities? DigiKey?
assisted by a GAL16V8 as glue logic. Same could be done with several
TTL chips, but I prefer a single chip solution even if it needs to be
programmed. This combination worked right away with my extremely
simple "echo" test
Have you posted the equations?
(snip)
A number of uses come to mind:
1. The main purpose - a convenient way to exchange data with a PC.
Need some guru's help to make this port accessible as a CP/M "device".
If you want support in the OS, it needs to act as PUN: and RDR:. A better
solution might be to write a MEX overlay that treats the USB logically as a UART.
Are there any comm programs available for Windows (or Mac, for that matter)
that can use the USB port?
2. Convenient debug output for a CP/M program.
3. A way to load the DOS 3.3 RAMDISK from a PC. If there are sources
for the code.
4. Very simple code loaded to the z80 will make this port available to
the 6502. The z80 code will just reroute data from it's address to USB
and back until 6502 resets the z80. Beats the heck out of SSC in speed.
I wonder if that setup can be used to emulate an Appletalk interface? Have to
give it some thought.