The next frame, the SNES will check for this vector, and respond accordingly.įor the game HUD, almost every reference to its WRAM buffer has been changed to a location in BWRAM where the SA-1 can see it. If a shortcut is found, a vector pointing to its routine in ROM will be saved in memory. The SNES CPU then sends an interrupt request which tells the SA-1 to process controller input for shortcuts. The clearing routine isn't coded very efficiently, so it's been optimized to about twice its original speed. There are specific routines that get run at the beginning and end of every frame to manage the OAM buffer. Due to the limitations on memory access, not every feature can be handled lag-free on the SA-1.įeatures that run on the SA-1 will be marked with this badge: SA1. This allows the practice hack to handle certain features with minimal lag change from vanilla.
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It can run code faster, but, more importantly, it can run at the same time as the SNES CPU without slowing it down. The SA-1 is a coprocessor that can be used alongside the main SNES CPU. Here's a quick rundown of how it works: SA-1 Increment/Decrement by larger amounts no wrappingĬommon concerns How accurate is lag compared to the vanilla game?Īs of version 14, very about 1/10th of a scanline off. When disallowed, shortcut bindings will play a beep and resume normal action. This menu and other shortcuts can be activated during most gameplay modes, but will be prohibited during some modules (such as the file select menu). The practice hack menu can be accessed by having the R and Start buttons held down together on the same frame. Input display for displaying your inputs on your display.Ĭonfiguration settings will persist across practice hack versions if newly downloaded hacks are given the same file name as previous versions on whatever system you use.Timers for comparing strategies and execution against yourself and others.Built-in save states for practicing anything repeatedly.Presets to load a specific section of the run with the appropriate equipment.
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The practice hack comes loaded with a full suite of HUD changes, features, and wedges to facilitate RTA practice and glitch hunting.
This version should be used by any system that can properly emulate the SA-1 with 256kb of BWRAM.
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