Re: FPGA Implementations
Posted: Wed Jun 28, 2017 7:37 pm
test
They were NOT standard "atari" joystick pinouts. I had to rewire the A15 board on my C4P to be able to get them working.w4jbm wrote: ↑Wed Jun 28, 2017 7:59 pm One other thing I haven't seen mentioned and had forgotten about is that the C4P (and I believe the later C1Ps) had a pair of joystick ports. I believe they were compatible with the old Atari joysticks. But basically it just had four directions and a fire button. It supported a pair of them.
I like the idea of an external module which could also be used as a drive emulator on a real machine.w4jbm wrote: ↑Wed Jun 28, 2017 7:55 pm On disk emulation, I have mixed feelings...
Building something external would let you use it with either the FPGA or as a replacement for the drives on one of the original system. (I have a C4P MF stored away, but I know the disk drives and diskettes are the weak point and hesitate to fire it up and burn through what life they have left.)
...
For this project, I'm using the Terasic DE0-CV (Cyclone V) board:w4jbm wrote: ↑Fri Jun 30, 2017 3:22 am That really is amazing. FPGAs are something I think I could eventually make do a lot of things, but you are cranking out in days more than I realistically could in years.
Are you still using the Terasic Cyclone DE0 board? I feel like its time to step up from the Cyclone 2C5 board I've been using.
I've uploaded the current snapshot of the code + programming file to:w4jbm wrote: ↑Fri Jun 30, 2017 5:30 pm I just ordered the Terasic DE0-CV from Digi-Key and also found the book you mentioned. I had been wanting a stouter FPGA board and this seems to do what I'd like to do for some other projects also.
....
I'm kind of wondering if a full binary of OS65D could be loaded using a hex file loader bootstrap or something just to see if it works I'd have to take a look at the disk images available to see if I could pull that together.
As strange as it sounds, one thing I'd like to do is get the editor / assembler / monitor program that came with OS65D going. I did a fair amount of programming in that.
Thanks, Jim