Das neue EVO64 C64 Board von Dr. Stefano wird wohl gerade produziert.
"We’re only making small quantities, so expecting the price to be about $250 USD for a board that will include all of the SMD components (including the 74 series logic chips and RAM).
This will still require some through-hole soldering for the I/O ports, the IC sockets and headers, the AC filter choke, power switches, etc. And that obviously doesn’t include old-school MOS chips (SID, VICII and CIAs)."
Alles anzeigen"EVO64 was developed by Dr. Stefano (aka Auro) out of an interest to combine many of the best features that have become available for the Commodore 64, into a sleek and fully integrated system, built using modern manufacturing processes, but still remaining completely true to the original system’s heritage and architecture.
For starters, EVO delivers the best video experience available, while remaining fully authentic. The integrated ClearVideo circuit (originally developed by Jaystonian), provides vibrant colors and none of those distracting “jail bars”. Whether your display supports Composite or S-Video, both output formats are fully tunable, using high precision potentiometers for micro adjustments. You’ll get the clearest images and the sharpest text that you can imagine.
EVO was designed with compatibility in mind. You’re free to use any VIC-II chip version that you prefer, from the old ceramic 6567 (NTSC) or 6569 (PAL) chips, which required 12v power, to the later generation 8562 (NTSC) or 8565 (PAL) versions, which switched over to 5v. It’s up to you. In fact, you can easily switch between them, with adjustable jumpers for voltages and PAL vs. NTSC crystals.
Similarly, you can choose any SID chip variant(s) that you prefer, from the earliest generation 6581, with its gnarly oscillators and filter glitches (operating at 12v), to the clean and pristine 8580 (operating at 9v). And as you would expect, EVO is also fully compatible with the most popular SID clones, like the ARMSID, the FPGA SID, the SwinSID and the SwinSID Ultimate, the BackSID, etc. Best of all, you can mix and match any combination of SIDs that you like, to get the best version of that retro sound you’ve been hearing in your head.
To ensure the best dual-SID compatibility, EVO incorporates logic that has been inspired by the MixSID (originally developed by Henning Liebenau). This enables a second SID to operate in full stereo mode. By default, the primary SID will always listen on address $D400, which ensures 100% backwards compatibility. However, the second SID will receive notes and instructions from both $D420 and $D500. This enables support for hundreds of the most amazing sounding dual-SID tracks from the High Voltage SID Collection (HSVC), as well as great dual-SID capable games, like the new Mario Brothers. You can also make your own stereo music with composer software like the CYNTHCART. A simple jumper adjustment will allow the second SID to listen on $DE00 and $DF00 as well. This provides further compatibility, for tools like the MSSIAH music composition cartridge, and other music players.
EVO ROMs are fully reprogrammable and instantly swappable. In fact, a single EPROM (the W27C010) provides support for up to 8x different Kernel ROMs, 4x different versions of Basic and 8x character sets. Bring along your own JiffyDOS or JaffyDOS (must be licensed to use). Experiment with blazing-fast load times, using DolphinDOS or SpeedDOS, etc. Switching between ROMs is as easy as moving a jumper.
EVO incorporates its own PLA chip (Programmable Logic Array), with algorithms that have been tested against the most highly-compatible solutions currently available, such as the neatPLA, the PLAnkton, etc. So, there’s no need to worry about sourcing one of those increasingly rare and known to be volatile PLA chips, like the MOS 906114-01. There’s also no need to pay big bucks for a giant SuperPLA chip like the 252535-01. Your games and demos will work flawlessly.
EVO has electrical static discharge (ESD) protection for the joystick and I/O ports. This prevents static electricity and reverse voltages from damaging your system.
Most importantly, EVO is an excellent hands-on DIY project that's simply fun to build. Most of the components from the original C64 have been modernized to use newer, low profile, surface mount equivalents (SMD/SMT), which are quick-and-easy to solder by hand, and they look great! There are multiple test points, which have been strategically placed all around the PCB, for your multimeter and oscilloscope. Other conveniences have been added, like an integrated tactile reset button that you can press while taking measurements, which saves you from having to power-cycle. There’s even a SMD LED that indicates the system’s power status, while the board is outside of a case. All of this makes it easy to build, convenient to perform testing and diagnostics with and it invites your creativity to design your own mods & upgrades.
Despite all the features and flourishes, EVO is still a fully authentic C64. It’s using real MOS chips for the CPU, the CIAs and the VIC-II, although these are the only original parts that you’ll need to source. All of the DRAM, SRAM and logic chips can either use salvaged components or leverage modern and currently manufactured alternatives, which are cheap, readily available and easy to find."
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