Interesting. You already have me thinking about getting one of these.
Right now I'm working on a software emulation of the CDP1802 and the CDP1861. To get this to work you will have to imitate the entire interaction between those two chips over interrupts and DMA. And The CDP1802's DMA servicing is not what you may expect from other processors. The timing must be in sync with the interrupt routine which takes care of the vertical resolution by manipulating the memory address for DMA.
ya not working on that at the moment, I'm working on a real one, i have get addressing working.
let me how your project goes.
wel97459 2 years ago
Interesting. You already have me thinking about getting one of these.
Right now I'm working on a software emulation of the CDP1802 and the CDP1861. To get this to work you will have to imitate the entire interaction between those two chips over interrupts and DMA. And The CDP1802's DMA servicing is not what you may expect from other processors. The timing must be in sync with the interrupt routine which takes care of the vertical resolution by manipulating the memory address for DMA.
CDP1861 2 years ago
@CDP1861 when I made that i did not really do it the right way and it was more of just getting the timing right and the VGA work.
But sens then I have made a real working version of the Cosmac VIP running on real hardware, and I have the chip 8 games running on it.
wel97459 1 year ago
@wel97459
You mean you have rebuilt a VIP with a real CDP1802? Great!
Meanwhile I have been doing some repairs on my old Elf II and now am getting together the parts for a more modern Elf.
CDP1861 1 year ago
@CDP1861 sweet are going to make any videos of it?
wel97459 1 year ago