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Mailbox (for comms between cogs)
Got some ancient code here that needs updating... Was started back in the P123 days... 'Mailbox for USB keys Mailbox3=$3FFF8CON 'graphics constants OffscreenBufferAddress=$40000 '320x240 =$12C00 DisplayBufferAddress=$50000+$3000 'size is 320x240=$12C00 (was 640x480=$4B0000) It also has two big screen buffers that are… -
Assembly NOP-ify extended line
Ran into an issue today that thought figured out, but still didn't work... Had an assembly line something like: asmadd1 add ptra, ##640*100 But, using same code for two different cogs and they need some adjustments. So, tried: asmadd1:=0 (To make it a NOP) in Spin2 before launching second cog into same code. After some… -
P2 Silicon Doc - now without the headache!
I ported Chip's P2 Silicon google doc (you know the one) to my Markdown-based website format. Check it out: https://p2docs.github.io/mirror/p2silicon.html There may still be some errors, please point them out if you see them. This has many potential advantages over the original google docs version: * Loads quickly and… -
Platform3 (Concept)
Need a new P1 board for a battery powered full color E-Ink display... Haven't made a P1 board in a very long time, so this is fun. Here's the concept so far (see image). Think the last "platform" board for P1 that we made was called "Express". This is an expanded update. USB connectors updated to USB-C FTDI chip updated to… -
1280 x 400 HDMI display code for P2?
has anyone used this wide display on P2: https://www.amazon.com/gp/product/B0F3C5R2BZ -
"Full Color" E-Ink displays
Just noticed these things on Seeed: https://www.seeedstudio.com/7-3-Seven-Color-ePaper-Display-with-800x480-Pixels-p-5787.html Was excited for a minute, but calmed down a bit when saw "full color" means 7 colors. Still, that is nice. 32 second full screen refresh isn't that great for "dynamic" displays, but if you only… -
Re: P2 Silicon Doc - now without the headache!
Read the doc again if you think that :P It just so happens that the 512K real chip we have has memory gaps, but the full 20-bit address space still exists. Anyways, the point is not to editorialize the doc, that's what the main pages are for. -
Re: Logicon
Yeah it's just another game for this purpose. What you want is * Options -> set width to 320 (before doing anything) * Test Patterns -> Geometry -> Grid and Overscan (both help with image alignment) * Video Tests -> Checkerboard or Vertical Stripes (helps with clock phase issues) -
Re: Mailbox (for comms between cogs)
Looked up where the debug stuff goes: The debugging program occupies the top 16 KB of hub RAM, remapped to $FC000..$FFFFF and write-protected. The hub RAM at $7C000..$7FFFF will no longer be available. Don't understand that "remapped" business, but looks like mailbox should be just below $7C000 to avoid the risk of being… -
Re: P2 Silicon Doc - now without the headache!
One thing that maybe could use fixing in both is the memory space? Seeing this a lot: $00400..$FFFFF hub RAM But, hub ram only goes to $7FFFF Seems the docs are still imagining a universe where there'll be a new P2 with more ram? Seems unnecessarily confusing to me...