[Simh] TOPS-20 on SimH

[Rich Alderson]

> From: "Robert Jarratt" <robert.jarratt at ntlworld.com>
> Date: Fri, 16 Jan 2009 19:28:46 -0000

>> -----Original Message-----
>> From: simh-bounces at trailing-edge.com [mailto:simh-bounces at trailing-
>> edge.com] On Behalf Of bsupnik at comcast.net
>> Sent: 16 January 2009 15:50
>> To: simh at trailing-edge.com
>> Subject: [Simh] TOPS-20 on SimH

>> KS10 support was dropped over V4.1 of TOPS-20, so the later versions
>> require KLH10, which simulates a full KL10E.

>> To install V4.1 of TOPS-20 on SimH, you need the installation manual
>> for TOPS-20 V4, which can be found (I think) on the Bitsavers site. It
>> runs fine.

> Just out of interest, what sort of effort would be likely to be required to
> add KL10E support to SimH?

Hi, Rob,

Off the top of my head, a few things are

1) completely different I/O instruction set
2) RH20 vs. RH11 MASSBUS for disk and tapes
3) addition of CI-20 (MSCP) channel for disk
4) addition of NIA-20 Ethernet interface
5) full extended addressing
6) completely different front-end architecture emulation

                                                                Rich