I'm on summer break from college classes, so I have time to focus on this more now.

Since then I decided that I should skip the second processor and just focus on one cpu.

Thinking about it, this thing is going to be running somewhere between 7-8Mhz, and clock for clock it's much faster than the ...

I'm curious if a dual ported ram such as this would suffice.

https://www.mouser.com/ProductDetail/Re ... FA4Q%3D%3D

Yea, sorry. I was needing a nap when I posted earlier.

Yeah, I meant that the W65C265S as the host processor.

I assumed too much about the '134S. I thought the SIB was a little odd. I just assumed the I/O port was the same thing.

Welp, live and learn. Oh well, I can just swap it out for a second ...

I'm thinking of using a W65C134s to control some secondary chips so as to offload the main cpu to give all of its grunt to the video chip.

Would it be possible to control the 8 bit MCU with the 16 bit one using one Parallel Interface Bus on each chip?

Would there be a particular set of pins I ...

Would it be possible to use the original 65SPI and use the newer one later when it's been perfected? I mean from a programming perspective. I have a project that needs SPI, and this is the only reasonable method of getting it.

At 7.3728 MHz would 55ns ram still be the correct one to use, or should it be a different speed? If I need a different speed ram/rom, what should I be using for that clock rate?

What would be a "baud-friendly" clock rate for the cpu to run at that's as close to 8Mhz as possible? I fully intend to use at least one Uart for a Serial port, but I want it to run fast as it can while doing so.

I'm at the PCB layout and schematic phase currently. I want to do an RS232 serial port. Would I be better off just running the Midi off of a separate 65C51 and feed it a 500Khz crystal, or giving it even feeding it off the clock output of one of the Uarts?

As for the SPI lines, is there a specific ...

What if I'm trying to also run SPI and receive PS/2 keyboard commands with the Midi? Would all of that even be possible on the Uarts at the same time? I'm guessing this would nix any possibility of a serial port if I run Midi.

I'm trying to figure out how to use one of the UARTs to send Midi data to the synthesizer chip I'm using. Does anyone know where I can find resources on how to do it on the microcontroller?

I finally found the time to figuring out more exactly what hardware I want to put into the design.
I put together a block diagram to give a loose idea of what I'm looking to do.
Tell me what y'all think. Keep in mind that the diagram is still a work in progress.

http://forum.6502.org/images ...

From the response email Bridgetek sent me:

railsrust:



In addition to display lists, you can also load bitmaps and configure font styles via the SPI lines from the microcontroller host.

For a first version I'll just use DIP Switches to sort between a NOR flash and an SD card just in case they ...

I had thought I read it would run in an 8Bit data mode with a lower BPP (or something like that), but it looks like I was mistaken. My only real issue with the BT816 is that I'd like the ability to have some graphics/sound/text data stored in a NOR permanently on the main board, but I'd like to pull ...

I have a backup chip that might be more authentic in its capabilities.
Sure, for assorted values of "authentic".

20-50Mhz, 16 alpha blended, with arbitrary rotation, reversible, full 24bit color sprites up to 1280x1280.

Sure is nice to have some horsepower.

It's a 256 pin chip, and has a 16b ...

As a backup in case the multi-processor thing doesn't pan out, I have a backup chip that might be more authentic in its capabilities. The only problem is that the bus speed is limited to 20 Mhz at a minimum. What would be the best way to get around this? Would it be possible to overclock the ...