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From: heinola@hkkk.fi (Bror Heinola)
Newsgroups: comp.sys.amiga.hardware
Subject: A590 and ancient accelerator problems
Keywords: A590, 68020
Message-ID: <1991May27.080406.10365@hkkk.fi>
Date: 27 May 91 08:04:06 GMT
Organization: Helsinki School of Economics, Finland
Lines: 35


	I got my hands on this ancient accelerator board, originally
	designed for A1000. It runs on 12MHz clock, with 12MHz 68020
	and 68881 FPU. It has 32-bit wide memory expansion facility 
	if daughtercard is added on top of accelerator board.

	Card has two parts, first small daughtercard which plugs into
	68000-socket, having two sockets, other for the 68020-card and
	other for the original 68000 processor. (Switch selectable)

	It is also fairly tall, the A500 keyboard won't fit in its
	place when the card is installed.

	The problem is, it won't work with my A590. 
	Drive led blinks, but screen stays grey. I tried it without
	autoboot, still no luck. Without A590 system works fine, but
	on power-on the screen is blue approx. 2 seconds and then 
	machine boots up normally. 

	Hardware setup;

	A500 with rev6 motherboard, 512k CHIP ram, old agnus
	512k expansion with clock in expansion slot
	External floppy drive
	A590 with 1MB FAST ram and that clunky WD XT-IDE drive
	Unknown 68020 accelerator board




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