LUNA-88K² is still running

LUNA-88K²is a workstation made by OMRON Corporation in 1992, a successor of LUNA-88K. It is driven by 33MHz Motorola 88100s (up to four) and Mach OS.

There are little information about LUNA-88K and LUNA-88K² on the web, so I collect some information here.

I'm looking forward to success to port NetBSD on LUNA-88K, but its progress is very slow, so I myself have ported OpenBSD.

Hardware

Comparison of LUNA-88K and LUNA-88K²

	LUNA-88K	LUNA-88K²
Model	DT8840/DT8860	DT9581
CPU	88100(25MHz)	88100(33MHz)
# of CPU	1/2/4(selectable)	1/2/4(selectable)
FPP	CPU internal	CPU internal
CMMU	88200(25MHz) x 2 per 1 CPU Cache 16Kbytes x 2 MMU TLB 56 entries x 2	88200(33MHz) x 2 per 1 CPU Cache 16Kbytes x 2 MMU TLB 56 entries x 2
Processing speed	100MIPS(4CPU, at peak)	147MIPS(4CPU, at peak)
Main memory	16MB(DT8840) 32/64MB(DT8860)	16/32/48/64MB or 16/48/80/112MB
Internal disk	250MB	520MB
Internal tape drive	155MB stream tape drive	155MB stream tape drive
PC-98 bus	N/A	2 slots
Interfaces	RS-232C x 2channel(1 for modem), External FD, SCSI, Centronics	RS-232C x 3channel(1 for modem), SCSI, Centronics, GPIB(optional)
LAN	Ethernet/Cheapernet	Ethernet/Cheapernet, 2 ports LAN(optional)
Bitmap board(selectable) Hsync 60Hz	2048x1024pixels, 1plane (1280x1024 CRT) 2048x1024pixels, 4plane, 16 out of 4096 colors	2048x1024pixels, 1plane, (1280x1024 CRT) 2048x1024pixels, 4plane, 16 out of 4096 colors 2048x1024pixels, 8plane, 256 out of 16.7M colors

(From "LUNA-88K Hardware manual" and "LUNA-88K² Hardware manual"(they are written in Japanese))

	disable	enable
SW1 1 Boot mode	Go into multi-user mode	Stop at ROM monitor
SW1 2 Console	Internal bitmap	External serial