In the '80s and '90s the Intel x86 and Motorola 68000 families were the two leading microcomputer architectures in the 16-bit/32-bit personal computer scene. The 68000s were even preferred by the p...
history - Why did the Motorola 68000 processor family fall out of use ...
The 68000 and 68020 are sometimes used where interrupt latency is less of a concern. 3: Ability to run at "micropower", ie. less than a milliwatt, in embedded applications that demand extremely long battery life, sometimes on the order of several years (eg. 6502s are used in pacemakers). This practically demands a "fully static" CMOS ...
m68k - Why are old CPUs like MOS Technology 6502 and Motorola 68000 ...
Are there more different ways Motorola 68000 A-line and F-line traps were used than the Classic Mac way and the Lisa way?
Are there more different ways Motorola 68000 A-line and F-line traps ...
Wikipedia says: The 68000 has a 24-bit external address bus and two byte-select signals "replaced" A0. Here is an image of the chip's pins: As Wikipedia says, A0 is not there. So instead, we've got D0 thru D15, so that the CPU can fetch or store 16 bits at a time. So what are the "byte-select" signals mentioned in the Wikipedia quote for?
m68k - What do the "byte-select signals" in the 68000 do ...
Motorola's 68000 has an instruction like ori.b #immediate, d0. This particular instruction is encoded as all zeroes, followed by a full 16 bits encoding an 8-bit immediate value. The instruction wo...
According to the 68000 bus diagram, there are 4 CPU cycles for a memory cycle, so an external frequency of 8 MHz. However, things are happening on the falling edges of the clock, so it seems like some internal state machine is running at 16 MHz.