TD Systems TDL-11 QBUS (SCSI?) card

Seth Morabito lists at
Sun May 3 15:24:00 CDT 2015

* On Sun, May 03, 2015 at 12:00:51AM -0700, Glen Slick <glen.slick at> wrote:
> From a very quick look at the TDL-11 firmware dump I can see some
> similarities to the TDL-12 firmware. In particular I can see some
> binary data that would be DMA'd into the PDP-11 host memory that would
> be executed as the host side communication channel to the TDL-11 on
> board configuration utility.
> I would have to spend more time disassembling the firmware to try to
> figure out what triggers it to DMA that code into the PDP-11 host
> memory and then start the execution of the configuration utility.

I disassembled the binary image with z80dasm, but my Z80-fu is very
weak. If it were a 6502 or a WE32100 I'd have it figured out by now!

Nevertheless, I'll keep at it and see if I can get anything out of it.


More information about the cctech mailing list