Beiträge von mega65 im Thema „WHAT MICROPROCESSOR ?“

    It is really all a question of work. I believe 100MHz - 150MHz would be possible. Moreover, that would be with a pipelined (but not speculative) CPU that would be able to dispatch one instruction almost every cycle, compared with every ~3 - 4 cycles in a standard 6502. Thus it would be something like 3x clock speed and 3x instruction throughput, so would be getting close to 10x faster than the current CPU.

    But that will definitely not be happening before the MEGA65 is released for sale.

    Paul.

    The MEGA65 uses an FPGA implementing an enhanced 6502 processor, the 45GS02, that supports all the instructions of the C65's 4510, as well as being able to switch to 6502 mode, where we intend to have full illegal opcode support. The CPU currently supports 1MHz, 2MHz, 3.5MHz and 40MHz modes (the final top speed may vary around that 40MHz point. It was 48, then 50, now currently 40. The final decision will be made soon before release, when we have timing closure and exact FPGA part selection nailed down).

    There is no "modern" processor. Just pure 8-bit. i.e., the MEGA65 is very different to the C64 Mini, for example.

    Paul.