nesdev.org

Pretty sure you're missing some #s. LDA num = load .A from address num; while LDA #num = load immediate value into .A.

While it is a bit drastic, to avoid home ISP constraints you could run Tor or I2P on your home machine. It can connect outbound-only into its respective anon-net, and then you can address your machine by hash, no matter where it ends up moving in the future. It's technically easier, more portable, a...

The matrix coefficients can be seen as simple deltas. Every time the raster moves 1 pixel to the right, the 2D texel coordinate moves by +(A,C). Every time the raster moves 1 pixel down, the texel moves by +(B,D). If the horizon is vertical on the screen, then the boundaries between tiles on a singl...

lidnariq wrote:Too bad the dots for "excellent" and "fair" in the scanned copy I found are indistinguishable:

This text version has it distinguishable, starting at line 7898.

Optional analog sticks I'm willing to forgive, as 8-bit arcade games were already using pot paddles ( Pong ), spinners ( Arkanoid ), trackballs ( Missile Command ), and the so-called "49-way joystick" ( Sinistar ) around that time. Wait, "so-called"? It's genuinely a 49-way digi...

Stepping back a bit, if you have more than 256 items to dispatch on, then your identifier will be at least 2 bytes. It can make sense then to just use address pointers for IDs instead of enums & dispatch tables at all. Whether or not those pointers point to code to jump to, point to a data struc...

I made an interesting 8*8=8bit shift-add multiply routine in 15 bytes (over in Commodore 64 land). It shrinks down to 11 bytes if you initialize .A yourself, for the added portion of a multiply-accumulate. The "interesting" part is that It exits early whenever the right-shifting multiplier...