Date   : Thu, 09 Mar 2006 13:57:00 +0100
From   : John Kortink <kortink@...>
Subject: Re: 1MHZ SCSI/ATA board.

On Thu, 9 Mar 2006 12:36:10 -0000, "David Hunt" wrote:

>> Andrew Benham wrote:
>> 
>> >> It's often amused me that the ACB4000 controlling the hard disk
>> >> on my BBC Master has an 8085 microprocessor on it, and a fair
>> >> amount of RAM.  So the hard disk SCSI->ST506 bridge board is
>> >> probably more powerful than the BBC is...
>> 
>> Methinks you overrate the Power of Intel sir! Don't confuse RPM with BHP.
>> 
>> Check the memory access timings. Cycle for cycle, I'll take a 6502 any
>> day.
>> 
>
>Yep, if IIRC the 8085 had a multiplexed address/data bus, but you could get
>force up to 6MHz with a heatsink... Didn't the 8085 suffer from the same
>problems as the Z80 regarding cycles per instruction, I vaguely remember the
>NOP being 4 cycles vs. 2 cycles on the 6502. So even doing nothing it's half
>the performance.

'Just look how fast your computer is waiting for you these days'.


John Kortink

-- 

Email    : kortink@...         
Homepage : http://www.inter.nl.net/users/J.Kortink

GoMMC, the ultimate BBC B/B+/Master storage system :
http://web.inter.nl.net/users/J.Kortink/home/hardware/gommc