Michael_Kelly@61ssc1.ceo.dg.com (02/08/91)
I have an A1000 (European/PAL model) with a fully populated (1.5Mb) IN-1000 memory expansion board and two 20Mb disk drives hanging off an HDA-506 MFM Disk controller. I am unable (most of the time) to boot from the hard disk. The symptoms are 'Out of memory' and 'Checksum' validation errors and Read/Write errors. The system will boot from DF0: without any problems. If I run the Hadr disk verify program, it doesn't find any errors. I have ran all Spirit's memory diagnostics without a single error. I've even tried removing 1Mb of the 1.5Mb without success. If I remove the IN-1000 board the HD boots without error. Occasionally I can succeed in booting the HD but only after zillions of presses on the 'Retry' button in the System Request window. Occasionally the system GURU's with error code 3 and an address in fast ram. Since both of these products were manufactured by Spirit, I would assume that they should be able to coexist happily together, or do they? Does anyone out there know different? Is there any other memory expansion products I could add on in place of the IN-1000 as the disk controller has a through port for the expansion bus? Thanks in advance for any help. Michael.