gslick
Veteran Member
Does anyone have any information on the TD Systems TDL-12 QBus SCSI controller? A search on the net does not turn up any detailed information. I did find some 10 year old posts from someone who was able to obtain a copy of the manual directly from TD Systems. Their home page now says "TD Systems Corporation is no longer an operating concern".
This controller appears to emulate an RLV12 controller for RL02 disk drives and has a base device address of 17774400.
There appears to be an on board configuration utility. The following text strings from a dump of the 27128 firmware EPROM appears to be from the main configuration menu:
C Configuration
D Display
E Exercise
F Format
I Initialize
L Error log
S SCSI Cmd
T Test self
W Write BSF
It is not currently known to me how this on board configuration utility can be accessed. The only connector on the controller board is the 50-pin SCSI header connector. There is no separate connector that could be for a serial port. Possibly if the magic sequence is manually poked into the controller registers a host based utility will be downloaded into the PDP-11 system memory, which can then be executed on the PDP-11 host.
This controller appears to emulate an RLV12 controller for RL02 disk drives and has a base device address of 17774400.
There appears to be an on board configuration utility. The following text strings from a dump of the 27128 firmware EPROM appears to be from the main configuration menu:
C Configuration
D Display
E Exercise
F Format
I Initialize
L Error log
S SCSI Cmd
T Test self
W Write BSF
It is not currently known to me how this on board configuration utility can be accessed. The only connector on the controller board is the 50-pin SCSI header connector. There is no separate connector that could be for a serial port. Possibly if the magic sequence is manually poked into the controller registers a host based utility will be downloaded into the PDP-11 system memory, which can then be executed on the PDP-11 host.