Hi, let me give you some background first:
I have a Mac Classic II that I acquired a decade or so ago, it suffered from leaky capacitors a few years back, and I've recently finished replacing all those on the logic board, and given everything a good clean with surgical spirit and a toothbrush. (It was a job I was comfortable with, having done a few Sega Game Gears, but it was a matter of finding the time to do it.) In the intervening period, the 40MB hard drive gave up the ghost. The head was sticking on the rubber stop, but in lifting the platter to remove the rubber gunk my hand slipped and I decapitated the head. So that Conner is a gonner. Other than that, the machine is running fine, and happily boots a Disk Tools floppy I've made.
I understand that Apple machines of this era came with hard drives fitted with custom EPROMs, and that they would refuse to initialise a non-apple hard drive (but would use an initialised one happily enough). Rather than spend money shopping for a SCSI2SD solution immediately, I nipped up to the loft and picked out the smallest SCSI drive I had to hand, a 1Gb IBM DPES-31080. I set it to ID 0, and booted the (patched) Disk Tools diskette, but it refused to acknowledge its presence. The drive can be heard spinning up fine, and is known to work in a PC-based SCSI system.
The drive I have has jumpers to control Auto Spin Up,Unit Attention, Termination, and TI Negotiation. Other than knowing that the drive should be terminated and configured as device 0, I have no idea how the Mac expects the drive to behave. A web search hasn't provided any results either.
Can anyone enlighten me as to how the Mac's SCSI bus is meant to be configured? If I don't have a suitable drive, one of my friends may do.
I have a Mac Classic II that I acquired a decade or so ago, it suffered from leaky capacitors a few years back, and I've recently finished replacing all those on the logic board, and given everything a good clean with surgical spirit and a toothbrush. (It was a job I was comfortable with, having done a few Sega Game Gears, but it was a matter of finding the time to do it.) In the intervening period, the 40MB hard drive gave up the ghost. The head was sticking on the rubber stop, but in lifting the platter to remove the rubber gunk my hand slipped and I decapitated the head. So that Conner is a gonner. Other than that, the machine is running fine, and happily boots a Disk Tools floppy I've made.
I understand that Apple machines of this era came with hard drives fitted with custom EPROMs, and that they would refuse to initialise a non-apple hard drive (but would use an initialised one happily enough). Rather than spend money shopping for a SCSI2SD solution immediately, I nipped up to the loft and picked out the smallest SCSI drive I had to hand, a 1Gb IBM DPES-31080. I set it to ID 0, and booted the (patched) Disk Tools diskette, but it refused to acknowledge its presence. The drive can be heard spinning up fine, and is known to work in a PC-based SCSI system.
The drive I have has jumpers to control Auto Spin Up,Unit Attention, Termination, and TI Negotiation. Other than knowing that the drive should be terminated and configured as device 0, I have no idea how the Mac expects the drive to behave. A web search hasn't provided any results either.
Can anyone enlighten me as to how the Mac's SCSI bus is meant to be configured? If I don't have a suitable drive, one of my friends may do.
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