13 hours ago, Fabio said:
i was thinking: isn't flash memory much slower when written? can it sustain the 12 Mz frequence ?
the vera fpga has proved to be capable to integrate at least the 65c02 cpu and a usb controller: wouldn't be a less controversial saving to use it to emulate an FM CHip in the X16?
No, I meant as ROM ... one of the things that RAM banks will be used for is to load code or data from SD card to have it available at the flip of the RAM bank ... if it can be in simulated ROM Banks already, that would cover that use.
If that is 2MB of flashROM that is loading the FPGA implementation code into the FPGA, which seems likely, the effective simulated flashROM for the running X8 system will be substantially smaller. Whether it is only enough to hold the Kernel and Basic (32KB), or is substantially more is one of the open questions to be answered by getting the LX8 system specs. It seems unlikely it would be substantially more.
Edit: Aha, it seems if the project sources "unofficially available" are correct, it's 512 bytes of ROM, overlaid on $FE00-$FFFF on power up to load the RAM with the system then quit ... so somewhere between 24KB and 32KB used by the system, depending on how much space the Kernel requires.