3 ms·
I am doing that for PalmOS 5.0 with reSpring actually: http://dmitry.gr/?r=05.Projects&proj=27.%20rePalm http://dmitry.gr/?r=05.Projects&proj=27.%20rePalm
by dmitrygr 7y ago
I am doing that for PalmOS 5.0 with reSpring actually: http://dmitry.gr/?r=05.Projects&proj=27.%20rePalm http://dmitry.gr/?r=05.Projects&proj=27.%20rePalm
- zokier 7y ago> I settled on the 4KB part purely based on cost. Even at this measly 4KB size, this one RAM is by far the most expensive component on the board at $25. Given that the costs of putting in a 64KB part (my preferred size) were beyond my imagination (and beyond my wallet's abilities), I decided to invent a complex messaging protocol and make it work over a 4KB RAM used as a bidirectional mailbox. Is this not the sort of memory you'd need? https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/CY7C0241E-15AXC/428-3064-ND/2485900 https://www.digikey.com/product-detail/en/cypress-semiconduc... or https://www.digikey.com/product-detail/en/idt-integrated-device-technology-inc/70V24L20PFGI/800-2606-ND/2010029 https://www.digikey.com/product-detail/en/idt-integrated-dev... just trying to understand the details here.
- dmitrygr 7y agoThose are similar to the ones I am using. Yes. And prices are similar too. Sadly.... Next rev I am replacing it with a small FPGA which will act as dual port memory. Believe it or not, that is much cheaper.
- lostgame 7y agoWhaaa? This, good sir, is fascinating! I am a huge fan of PalmOS and still use my Palm every day. I would love to make a custom Palm with a custom PalmOS but never even considered the plausibility or possibility. I’m gonna read through this now.