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I started similar topic on Polish Atari Area. http://www.atari.org.pl/forum/viewtopic.php?id=13760 I have crazy idea. What about STM32 cartridge. It will make faster only some of CPU instructions so Atari will stays Atari. For demos or to have hundred sprites on screen...? Why STM32? Its cheaper than ATMEL and more common than PIC. It is 32bit... Bigger EEPROM, RAM in MCU. There will be no new graphics, no new sound. Only massive CPU upgrade but only for some instructions. For example 256 sprites, fast 3d or vector, game with 128 sprites and sample playback on pokey (as you know MOD on Pokey eats CPU). Or I can image pictures in lot of colors (multiple pages switching). So they will be not blinking... I know there is Veronica. It is beautiful but price of 65816 is higher than STM32 (few cents max to 10 dollars). I know there is very nice Tomek8 but as I wrote PIC is not so powerful as same priced STM32... And as bonus you can get STM32 in huge quantities... I somewhere read something exactly same exists for ColecoVision or 2600... For example 6502 emulator on STM32: GITHUB https://github.com/BigEd/a6502 "On that dev board, the CPU runs at 168MHz and the emulated speed of the 6502 is 18MHz." Thats almost 10x+ faster as original Atari. And there is also 180MHz model STM32... Price is 10Euro... for STM32F407VGT6: 32 Bit Microcontroller, Ethernet MAC, Camera Interface, ARM Cortex-M4, 168 MHz, 1 MB, 196 KB, 100 Maybe we can have Ethernet too on that cartridge for multiplayer games. I can imagine NUMEN engine shooter and LANPARTY! like QUAKE! Or DUNE2 / Settlers 2 game !!! Multiplayer / online... This will adds new dimension to our ATARIs... Playing games together. New speed for CPU. Lot of sprites, pokey sample playback etc etc... So it will be turbocard but also will accelerate graphics and sound. Plus online multiplayer gaming or local LAN party as bonus. Bad or good idea? Lets brainstorm this. I can imagine games in hires with huge sprites. Or 160x200 games with ultra fast scrolling (space shooter) for example. Or vector game with samples. Or 3D demo looking almost like from Amiga 500... When price of cartridge will be 20-30Euro. Everyone will be able to buy it.