[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: CB developers




"Steven Hirsch" <snhirsch@gmail.com> wrote in message 2eidnbYXBvpi_YzRnZ2dnUVZ_qSdnZ2d@giganews.com">news:2eidnbYXBvpi_YzRnZ2dnUVZ_qSdnZ2d@giganews.com...
On 06/10/2010 01:30 PM, rich12345 wrote:

It would be great to have :
1)HDL tutorial
2)using CB with HDL
3)apple II bus specifics using CB

I think you've better stated where I'm blocked as well.

I would like to see code that manipulates the apple II bus.

IE:
intercept access to $XXXX r/w
store/read data to/from $XXXX using DMA
store/read data to/from $XXXX using RDY
using RDY to halt 6502

the above need correct timing to work with the bus properly

Yes, indeed. Some simple reusable bits of VHDL that can be used to compose larger useful designs.

The file 'cb.ucf' contains the pin assignments. I'm not sure exactly where the read/write slot bus routine is, but, I am pretty sure it would be in one of the 'xxxxxx.V' modules. Try 'cb1.v' as it seems to have all of the slot defines in it. That will probably be the one that you are looking for, and it is Verilog, not VHDL. Again, I'm sure it isn't too difficult to port one to another. Bill