Re: HP71B - Bus Message #5 Posted by Hans Brueggemann on 7 May 2010, 2:19 p.m., in response to message #3 by Raymund Heuvel
hi raymund, i am currently working on a RAM extension, too. i did some investigations on the HP-bus and it works very well according to the hardware IDS, chapter 2.1., 2.2, 2.3. i did not test 2.4. yet. chapter 2.3.data transfer implies that single nibble transfers are possible, but i was never able to catch one in real life. maybe, someone (you?) can shed some light on as to whether there *are* single nibble data transfers, or always bytewise data transfers on the bus.
best regards, hans
Edited: 8 May 2010, 2:26 a.m.
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