[Coco] Q: Burke & Burke hard disk controller
Steven Hirsch
snhirsch at gmail.com
Tue Sep 30 20:36:20 EDT 2008
On Tue, 30 Sep 2008, Chuck Youse wrote:
> On Tue, 2008-09-30 at 10:23 -0400, Steven Hirsch wrote:
>> On Tue, 30 Sep 2008, Ciaran Anscomb wrote:
>>
>>> Steven Hirsch wrote:
>>>>
>>>> Or, will a 16-bit IDE drive work while throwing away half its
>>>> capacity (no access to the upper byte of data)?
>>>
>>> Yes, this definitely works. I recently picked up an IDE/CompactFlash
>>> interface off Ebay for the BBC Master, and it is an 8-bit interface.
>>> 8 bits of each 16-bit transfer are simply discarded.
>>>
>>> Looking around a bit revealed that at least the most common ATA commands
>>> are all contained within 8 bits.
>>
>> Good, I thought I remembered hearing this from an Apple 2 owner. There
>> are several IDE adapters for that platform, but almost no availability of
>> IDE hard drives with support for 8-bit data transfer.
>>
>> It's "iffy" whether the B&B support software will recognize the
>> controller, but trying it won't hurt anything.
>
> The HDISK, which will be available for sale within days (just need to
> find the time to assemble them!) does precisely that- 8-bit IDE
> transfers, truncating the upper 8 bits. This means it'll work
> half-capacity IDE disks and won't support ATAPI.
Haven't heard of this device. Is it a CoCo adapter?
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