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Old 05 November 2007, 08:54   #9
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 41
Posts: 17,857
68EC020: 32-bit data bus. Address bus is 24-bit.
68020+: 32-bit data and address bus.
68000/68010: 16-bit data bus, 32-bit CPU internal data bus (or more like 2x16 but this is only implementation detail ). 24-bit address bus.

Custom chip "bus": OCS/ECS 16-bit data. AGA 16, 32 or 2x32 (two fetches per memory cycle). Only bitplane and sprite DMA can use wider bus.

Chip RAM bus width: 16-bit in OCS/ECS. A3000 has special circuitry to allow 32-bit CPU access. 32-bit in AGA.

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