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1. waving at the shore (xj9@social.sunshinegardens.org)'s status on Friday, 15-Mar-2019 23:18:03 JST waving at the shore

   • waving at the shore
   > Building a 'Homebrew' Video Game Console
   
   CPU:
   
   8-bit CPU Zilog Z80 operating at 10Mhz.
   8KB of ROM for bootloader.
   56KB of RAM.
   
   IO:
   
   Reading data from FAT16/FAT32 SD Card.
   Reading/writing to RS232 port.
   2 MegaDrive/Genesis-compatible controllers.
   PS2 Keyboard.
   
   Video:
   
   224x192 pixel resolution.
   25 fps (half PAL fps).
   256 Colors (RGB332).
   2x2 virtual background space (448x384 pixels), with bi-directional per-pixel scrolling, described using 4 name tables.
   64 sprites with width and height 8 or 16 pixels with possibility of being flipped in X or Y axis.
   Background and sprites composed of 8x8 pixels characters.
   Character RAM with 1024 background characters and 1024 sprite characters.
   64 independent background horizontal scrolling in custom lines.
   8 independent background vertical scrolling in custom lines.
   Overlay plane with 224x48 pixels with or without colorkey transparency.
   Background attribute table.
   RGB and Composite PAL output through SCART socket.
   
   Sound:
   
   PWM generated 8-bit 4 channel sound, with pre-defined waveforms (square, sine, sawtooth, noise, etc.).
   8-bit 8Khz PCM samples in one of PWM channels.
   YM3438 FM synthesis chip updated with instructions at 50Hz.
   
   
   https://internalregister.github.io/2019/03/14/Homebrew-Console.html
   • Protected Moomin repeated this.
   • Protected Moomin (moonman@shitposter.club)'s status on Friday, 15-Mar-2019 23:37:17 JST Protected Moomin

     • Protected Moomin
     @xj9 This is particularly interesting for two reasons:
     1. he's generating a raw PAL signal from a microcontroller
     2. It's tile-based, like all classic consoles, and unlike every other "retro homebrew" setup.