Jump to content

ijor

Members
  • Posts

    3,004
  • Joined

  • Days Won

    3

ijor last won the day on April 10 2023

ijor had the most liked content!

Contact / Social Media

Profile Information

  • Interests
    vapi,pasti

Recent Profile Visitors

13,492 profile views

ijor's Achievements

River Patroller

River Patroller (8/9)

1.1k

Reputation

  1. Hi, thanks for your words. The main issue now, probably the only issue at this point, is to find somebody that would build and sell the hardware. A "simple" Antic chip replacement is not very lucrative, it might be difficult to find somebody interested in manufacturing and selling this as a product. We had the idea of developing a "Super" ANTIC with VBXE capabilities built-in, among other things. But again, I don't build hardware, and certainly I'm not a seller ...
  2. Double post, sorry. Please delete.
  3. Yes, most modern MCUs have 5V tolerant inputs (with some limitations). This alone by itself should reduce costs significantly. Add to this that Chinese MCUs (Artery AT32) have rock bottom prices. I suspect that Pokey might require a faster MCU than SID, though. If it works correctly with real hardware, then it is still a RespeQt issue. Not necessarily a bug in the strict sense though. If the software requires cycle exact timing for some reason, RespeQt might not be able to deliver, due to the host limitations.
  4. I'm not sure I understand why you are saying this. Are you saying that a new POKEY core should be developed because you think the Joyride's issue is PokeyMax core fault? I you read what @foft said, it seems the issue is not related to PokeyMax at all.
  5. If you have older, non-ANSI, code, it might be just easier to run the original compiler under emulation. Emulators can map host folders to emulated hard disks. So you don't even need to bother copying your source files between the host and the emulator.
  6. Please don't abuse forcing REFRESH low. It won't work with an ANTIC FPGA replacement. And to be honest, I'm not 100% convinced it is the best thing to do even for a "standard" ANTIC.
  7. We are talking here about replacing individuals chips in an original Atari motherboard, not recreating the whole computer with a single FPGA. Not saying it is better or worse, just a different thing. A FPGA based XL was already implemented by @foft in his EclaireXL product.
  8. I'm afraid I don't remember exactly. I remember it fits comfortably in the MAX10 02. I would need to run a compilation to get a better estimation. Of course, it also depends on a few factors, such as how you would handle the analog signals or the clocking.
  9. That is the faster speedgrade -7. The slower speedgrade (-8) is slightly cheaper, although some variants might be out of stock at this time.
  10. It's handled by the WD1772 FDC, which is in the XF's PCB.
  11. All MFM FDCs devices support write precompensation. The 1050 already enables write precompensation for the inner tracks on MFM (enhanced or double density).
  12. Ah, no. I was talking about the "latest" FPGA devices from the main manufacturers, Intel and AMD. Lattice usually concentrates in "niche" FPGA markets. I'm not familiar with this Lattice FPGA family, but this particular tiny FPGA might not fit. For comparison, the smallest Intel FPGA, MAX10 02, has 2K LEs.
  13. There is no need to use 5V tolerant FPGA. As noted already, you use voltage level shifters instead. That's how most FPGA based add-ons are designed, including PokeyMax, Sophia, UltimateCart, etc. Pokey, or any of the custom chips for that matter, fits in the smallest modern FPGA, that costs less than $10.
  14. The original software by Spartan was a "Chip" emulator. Years later CSS released new software, AFAIK only for the Happy 1050, that emulated a Super Archiver (with some limitations). Not sure about that Kiwi one, never tried it.
  15. @Simius will correctly if I'm wrong. But I'm pretty sure that even the first Sophia version produced the digital video completely on its own. It didn't perform an analog to digital conversion from the GTIA video output pins.
×
×
  • Create New...