Memory Addressing Architecture

Zetr0 · 10 July 2007, 14:42

Hiyas Forum Fiends (ahem i mean friends)

Okay I have been having a ponder (as Zetr0's do) and a query has entered my mind.

could anyone confirm or debunk this analysis.

CPU MAA (16bit - 24 bit and 32 bit)

The 68000 use a 16bit memory addressing structure?

The 020's & 030's use a 24bit memory adressing structure ?
*was there some that used 32bit ?*

The 040's and 060's use a full 32bit adressing structure?

I appreciate the help

rgen · 10 July 2007, 15:14

Don't know what MAA means but besides that, all 68Ks have 32bit internal addresses.
The 68000 and 010 have 24 adress lines external and a 16bit data bus.
The 68ec020 have 24 address lines and a 32bit data bus and the 68020 and above have the complete 32 address lines.

Zetr0 · 10 July 2007, 16:55

thanks rgen, that clears up the confusion i was having

TA

10 July 2007, 14:42	#1
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 38 Posts: 9,185	Memory Addressing Architecture Hiyas Forum Fiends (ahem i mean friends) Okay I have been having a ponder (as Zetr0's do) and a query has entered my mind. could anyone confirm or debunk this analysis. CPU MAA (16bit - 24 bit and 32 bit) The 68000 use a 16bit memory addressing structure? The 020's & 030's use a 24bit memory adressing structure ? was there some that used 32bit ? The 040's and 060's use a full 32bit adressing structure? I appreciate the help

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10 July 2007, 15:14	#2
rgen Registered User Join Date: Mar 2002 Location: Aachen/Germany Age: 35 Posts: 190	Don't know what MAA means but besides that, all 68Ks have 32bit internal addresses. The 68000 and 010 have 24 adress lines external and a 16bit data bus. The 68ec020 have 24 address lines and a 32bit data bus and the 68020 and above have the complete 32 address lines.

10 July 2007, 16:55	#3
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 38 Posts: 9,185	thanks rgen, that clears up the confusion i was having TA

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