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Folks,

The UM tables file included in the d6 distribution includes:

SA00 IODEVICE ADDRESS=(00C0,10),CUNUMBR=(003),UNIT=SDA
SA10 IODEVICE ADDRESS=(00CA,2),CUNUMBR=(003),UNIT=SDA
LA00 IODEVICE ADDRESS=(00CC,10),CUNUMBR=(003),UNIT=MRXA
LA10 IODEVICE ADDRESS=(00D6,10),CUNUMBR=(003),UNIT=MRXA
LA20 IODEVICE ADDRESS=(00E0,10),CUNUMBR=(003),UNIT=MRXA
LA30 IODEVICE ADDRESS=(00EA,6),CUNUMBR=(003),UNIT=MRXA
SA12 IODEVICE ADDRESS=(00F0,8),CUNUMBR=(003),UNIT=SDA
LA44 IODEVICE ADDRESS=(00F8,6),CUNUMBR=(003),UNIT=MRXA
LA50 IODEVICE ADDRESS=(00FE,2),CUNUMBR=(003),UNIT=MRXA

It'd be nice to have at least a few plain tty type lines available. Are
these devices included in the D6.0A runnable distribution? Any hints on
how to enable them? I tried adding:

00FE 2703 LPORT=2741 DIAL=IN TERM=TTY LNCTL=TELE2

to hercules.cnf, and giving `MTS LA50` on the console after ipl. But
MTS says:

00029..MTS LA50
00029 MTS "LA50": does not exist.

and hercules' status seems suspect:

HHC02279I 0:00FE 2703 ASYNC STA=DISA CN=NO, EIB=NO OP=IDLE IO[0] open

Thanks,

De

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Mike
Alexander
Sent: 19 December 2020 07:53
To: [email protected]
Cc: George Helffrich <ghfbsd@...>
Subject: Re: [H390-MTS] 2703 lines

Those MTS devices are Memorex 1270 devices (that's what MRXA means)
and are not directly compatible with IBM 2703 devices, although similar.
There is one DSR in MTS that supports both types, but it has to know which
type it is talking to. You might get further if you patch the device type

" or maybe "2741" but probably not. George Helffrich recently got 2741
support working in D4.1 MTS running on simh emulating a 360/67. This

really directly relevant, but his experience might shed some light on how

make this work.

What, exactly, is Hercules emulating? A dial up TTY attached to a 2703?
A dial up 2741 on a 2703? MTS supports both but needs to know which it

talking to. The device type in TABLES in MTS needs to be set

George also found a bug in the DSR that supports these devices. It has
assembly parameters controlling whether to include support for 2703 and/or
MRXA controllers. However if you turn on both options the 2703 support
doesn't work right. By the time of D4.1 we no longer had any real IBM

and so the DSR was never tested with them. Apparently it didn't work.
George's solution was to reassemble TSFO with support for MRXA turned
off. This made 2703 support work. He also had to fix a few minor bugs in
simh which isn't relevant, but you might well find some incompatibilities
between Hercules 2703 support and MTS.

It would be nice to get this working in D6.0 since a simulated 2741 makes

nice terminal for some purposes.

I've CCed you, George. Let me know if I've misrepresented anything you

Mike

On 17 Dec 2020, at 15:38, Dennis Boone wrote:

Folks,

The UM tables file included in the d6 distribution includes:

SA00 IODEVICE ADDRESS=(00C0,10),CUNUMBR=(003),UNIT=SDA
SA10 IODEVICE ADDRESS=(00CA,2),CUNUMBR=(003),UNIT=SDA
LA00 IODEVICE ADDRESS=(00CC,10),CUNUMBR=(003),UNIT=MRXA
LA10 IODEVICE ADDRESS=(00D6,10),CUNUMBR=(003),UNIT=MRXA
LA20 IODEVICE ADDRESS=(00E0,10),CUNUMBR=(003),UNIT=MRXA
LA30 IODEVICE ADDRESS=(00EA,6),CUNUMBR=(003),UNIT=MRXA
SA12 IODEVICE ADDRESS=(00F0,8),CUNUMBR=(003),UNIT=SDA
LA44 IODEVICE ADDRESS=(00F8,6),CUNUMBR=(003),UNIT=MRXA
LA50 IODEVICE ADDRESS=(00FE,2),CUNUMBR=(003),UNIT=MRXA

It'd be nice to have at least a few plain tty type lines available.
Are
these devices included in the D6.0A runnable distribution? Any hints
on how to enable them? I tried adding:

00FE 2703 LPORT=2741 DIAL=IN TERM=TTY LNCTL=TELE2

to hercules.cnf, and giving `MTS LA50` on the console after ipl. But
MTS says:

00029..MTS LA50
00029 MTS "LA50": does not exist.

and hercules' status seems suspect:

HHC02279I 0:00FE 2703 ASYNC STA=DISA CN=NO, EIB=NO OP=IDLE IO[0]

open

Thanks,

De