Ethan Dicks via cctalk wrote:
On Thu, Sep 23, 2021 at 6:41 PM Jonathan Stone via cctalk
<cctalk@classiccmp.org> wrote:
I've read that there is circuitry in the expansion base (BA40A?) has circuitry
. Does anyone know what the circuitry does? Is it required for SCSI
operation? (I hope not, or I'll have to kludge one up to make use of pk2k SCSI
boot-roms!)
IIRC the DHT32 has a small board in the skirt and the external RD
interface may have a board as well. SCSI (for a TK50Z-FA, originally)
is just a cable. The 50-pin connector on the mainboard is correctly
wired for SCSI. It may well have TERMPWR active and not
current-limited though, if it matters to your target.
-ethan
Indeed, Ethan. TERMPWR is active. I actually have two 1GB disks inside
mine (I do not
have an expansion box), and I kludged a centronix SCSI connector in
the back to connect
external stuff.
By the way, if anybody needs the four patched rom images, I can share
them off-list.
carlos.
