21 Apr
2019
21 Apr
'19
9:11 a.m.
On 4/20/19 1:32 PM, Al Kossow via cctalk wrote:
Picked one up, it is the last generation of 3274-style
controllers before they went to 3174-style ca. 1988.
I'd like to find manuals and the IPL diskette (1.2mb).
The unit actually had an IPL floppy, but it disintegrated trying to recover it (there is
signs of
rust inside the hardware so the whole thing got wet).
I took some pics of the boards (each one has a 68000 on it, only one board has eproms)
and dumped the firmware which is up now under telex on bitsavers.
Curiously, the floppy appears to be in FILES-11 format..
The floppy isn't completely dead even though trk0 on both sides is gone.
Made a clone of the floppy with a SuperCard Pro board and it IMLs far enough that I can
get into some diagnostics.
Don't know what to do without docs.
I suspect the configuration goes through the RS-232 port, since all of the configuration
string are in ASCII.
Today's project is to go through the later-gen 1174 controller docs to see if there is
some hint of how to
configure the thing and try that on the earlier model.