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Thanks to the efforts of foft (Mark Watson) and his Atari FPGA project, there is an open source FPGA pokey implementation available. As a little Easter bank holiday project, I thought I'd have a go at using it to make a dual pokey cartridge using a prototype of the Ultimate Cart as the starting point... Two of the fpga pins act as audio left and right, and I've hooked them up to a low pass filter on some perfboard, along with a 3.5mm stereo jack (which leads to my TV's audio input). It was pretty easy to make a firmware for the Ultimate Cart that included two of foft's pokeys, his DAC and a bit of VHDL to hook them up to the cartridge port. Then I modified TMC and RMTPlayer (with a hex editor) to output to the two pokeys at $D50x and $D58x. I guess technically this atari has 3 pokeys now (one inside, and two on the cartridge). The two pokeys use about 10% of the Ultimate Cart's FPGA, so there is plenty room for more. This was just for fun, and perhaps to show a little of what is possible with a FPGA hooked up to the cart port. To make a proper external dual pokey, we'd probably want to use ECI+Cart port, so the pokeys could appear in the correct places in the memory map. MP3 of TMC playing via the dual pokeys attached. SynthyGambol_vhdl_pokey.mp3
I have looked all over, and not found a list of verified compatible SD and CF media for Ultimate Cart (SD) and Incognito/SIDE (CF). Is there such a list? If not, let's start one here. For example, I am using red & blue style Sandisk 4GB SD card and 1GB CF. They work well, but the CF is getting full and I want to know what to buy to replace it with a larger one. Also, in the Ultimate SD cart thread, a Toshiba FlashAir SD card was mentioned. I found both W-02 and W-03 versions of this available. I ordered the W-03 version in hopes that it will work. The thread didn't mention what version it was that is known to work, although the link pointed to a W-03, so I'm hoping I don't get burned again. So, the question is: What media do YOU use? And, just as important: What media is to be avoided? Thanks in advance.
Hi all, The original shell for my Ultimate Cart was a hacked Atari grey cart shell, which I spray painted blue. Unfortunately the paint has rubbed off a bit, and its now looking rather tatty. So, now that I've got a 3d printer of my very own, I decided to design a shell for the Ultimate Cart. Like the rest of the project, this shell is open-source. I've uploaded both the STL files and the design files (OpenSCAD) to the github site: https://github.com/robinhedwards/UltimateCart/ The shell should fit any PCBs produced using the board files on github. This should be most of the boards out there, with the exception of the redesign by Panos that he used for his later runs (but I think these came with nice shells anyway). If you're not sure, compare your board to the pictures on github - if the connectors and screw holes are in the same places, it should fit. The cart has been tested for fit in my 65XE, and 800XL. Flashjazzcat has been kind enough to test it for me in a XEGS, 800 and 1200XL, and reports it fits well. If you don't have access to a 3d printer, I'm happy to make a few of these for others. This would be using the same printer and filament colours (bronze & red) as the pictures above. The price would be £22 + P&P (£1 to UK, £3 elsewhere). Send me a PM if interested. Robin
Hi All, One thing I really wanted to add to the Ultimate Cart was an easy way to use XEX files on the cartridge. Thanks mainly to flashjazzcat, we've now added this as a feature to the firmware. XEX files present on the SD card can now be browsed and launched just like cartridge/ROM files. Loading is practically instantaneous. You can program the attached new firmware to your Ultimate Cart using the (free download) Quartus 15.1 programmer. You will also need a USB Blaster (<$10 on ebay). Consider it a beta - there may be the odd bug. This firmware also replaces my original menu with the improved version by flashjazzcat. Since this is now part of the firmware, you should remove any older version of it from the SD cart (i.e. remove _BOOT.ROM if you have it). This will become the current firmware, and I'll upload the source files to github once this has had a bit of a wider test. I'm sure this will be a very welcome addition to the cartridge firmware, and praise and thanks should be directed to flashjazzcat who wrote the XEX loader and the improved menu - tasks both way beyond my 6502 skills! Robin 10M08SAE144C8G.zip