68010

created by Jope

(thing) by Jope (8.9 mon) (print) ? (I like it!) 1 C! Fri Jan 19 2001 at 8:57:42

The 68010 is the successor to the 68000 processor. It has the same pinout, and instruction set. It was intended for an easy way to make existing designs faster without redesign of the hardware or firmware.

Unfortunately, one instruction was changed: move sr,dn changed from a user mode instruction to a supervisor mode instruction. This breaks many old Amiga games and demos. The fix is to replace move sr,dn instructions to move ccr,dn. A one byte patch.

The 010 optimizes single instruction loops containing multiplication and division. According to Motorola, this equals to a frequency upgrade from 10MHz to 12,5MHz.

(thing) by Potatoswatter (2 mon) (print) ? (I like it!) Sat Apr 20 2002 at 2:08:17

The main change from the venerable 68000 to the now-obsolete 68010 was the addition of support for virtual memory. A few instructions were added and a couple were modified to support the few extra complications this brought to interrupt handling and address spaces.

I'm not an expert on the processor but I think it must have been introduced simultaneously with the 68851 PMMU support chip, which did the actual logical to physical translation.

68060	UNIXpc	68000	68020
68040	One, two, three, four, I declare a thumb war!	680x0	DragonBall
PMMU	virtual memory	68030	Sun 2
Jape	Venerable	cpublit	boot loader
MMU	So you wanna be a hacker

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