http://www.verycomputer.com/154_4a8cccf80be2a821_1.htm

68000 box
Post by Wolfgang Zoch » Wed, 30 Nov 1994 21:31:46

I recently got an old (<1984) 68000 box. Included are several
Multibus cards from Omnibyte (OB68k1A, OB68k/INT), an additional
memory card, a hard disk and one (8") floppy drive. The box
was manufactured from Scientific Micro Systems. The OS is
IDRIS (??).

When I boot the system, a monitor program called MACSBUG is
started and that's all what happens ..
Does anybody know this box? Does anybody know IDRIS or can give
some pointers to books, manuals, etc.? Does anybody know MACSBUG?
Thanks in advance 

by Richard Meredit » Wed, 07 Dec 1994 05:18:40

The 68000 was originally marketed as 'Motorola Advanced Computer System
on Silicon', aka MACSS, and MACSbug came from there.
IDRIS ISTR was a clone or port of Unix version III, marketed by
Whitesmiths, and much modified.
Richard.

 by J. Janse » Tue, 06 Dec 1994 21:23:58

IDRIS was a Unix like operating system (i think System 7 modelled) that
allowed running on a non MMU environment. EKF had it running (really) on
a 68008 based system.
I think EKF has the full documentation set (several thousand pages).

Might be that Bernie Bardohl has the same box as you have, write to him

[Wikipedia describes IDRIS as binary compatible with Unix V6, and
developed initially by P.J. Plauger in 1978; then ported to several machines.]

==================================

https://github.com/mamedev/mame/blob/master/src/mame/drivers/ob68k1a.cpp

describes support for the Omnibyte OB68K1A board, and apparently support for
MIKSBUG and two OMNIBYTE ROM binaries. 

ROM_START( ob68k1a )
	ROM_REGION16_BE( 0x10000, MC68000L10_TAG, 0 )
	ROM_LOAD16_BYTE( "macsbug.u60",     
	ROM_LOAD16_BYTE( "macsbug.u61",     
	ROM_LOAD16_BYTE( "idris_boot.u62", 
	ROM_LOAD16_BYTE( "idris_boot.u63",  

https://edgeemu.net/details-41580.htm 

ROM Information
Name: OB68K1A Single Board Computer
Download: ob68k1a.zip
System: MAME .208 ROMs
Size: 9.08 kb
DL Count: 90
File Listing
Filename	Filesize	CRC
 idris_boot.u62	 8192	 091E900E
 idris_boot.u63	 8192	 A132259F
 macsbug.u60	 8192	 7C8905FF
 macsbug.u61	 8192	 B5069252