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- 18 KB (2,398 words) - 11:29, 16 March 2015
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- The VDP is mapped to an area of the 68k's memory — it may wrap around after the end of defined addresses, but the ...ndicates the status of it, and should it become full, the [[Motorola 68000|68k]] is halted until the FIFO clears. Therefore, it's recommended practice to62 KB (9,790 words) - 10:31, 30 April 2015
- ...Drive at full speed, but still has the ability to access a 32 KB window of 68k address space that can be banked anywhere in the address space, but should ...the Z80 has stopped, bit 0 of $A11100 must be checked - if it's clear, the 68k may access the bus, but wait if it is set. Once access to the Z80 area is c9 KB (1,549 words) - 11:29, 16 March 2015
- ...in almost all cases by using the Z80 for this task to avoid locking up the 68k, and the main game logic.12 KB (1,946 words) - 11:29, 16 March 2015
- ...ry 128 68k clocks - if accessing it during refresh, it will be delayed one 68k clock.9 KB (1,467 words) - 16:19, 16 March 2015
- The 315-5364 is the Bus Arbiter/68K address decoder found in later Model 1 [[Mega Drive|Mega Drives.]] In essen ...s [[Zilog Z80#Bank Register|bank register]] used to select the appropriate 68k bank, whose address this chip puts on the bus during free cycles.965 bytes (166 words) - 11:29, 16 March 2015