From 639e39a83b7e07678fac8b4d5755d44311c4fdac Mon Sep 17 00:00:00 2001 From: Vitor Vilela Date: Wed, 8 May 2019 02:38:52 -0300 Subject: [PATCH] Update readme --- README.md | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 96 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index edfffdc..2193f8f 100644 --- a/README.md +++ b/README.md @@ -1,2 +1,96 @@ -# SA1-Root -Base pack of patches for activating SA-1 for many different games. +``` + _____ __ _____ _ + / ____| /\ /_ | | __ \ | | +| (___ / \ ______| | | |__) |___ ___ | |_ + \___ \ / /\ \______| | | _ // _ \ / _ \| __| + ____) / ____ \ | | | | \ \ (_) | (_) | |_ +|_____/_/ \_\ |_| |_| \_\___/ \___/ \__| + Version 1.0 by Vitor Vilela +``` + +SA-1 Root is the base pack of patches for activating and using SA-1 +on many different games. SA-1 Root currently has patches for the +following games: + +* [Gradius III](Gradius-III) v1.4 +* Super Mario World ([SA-1 Pack only](https://github.com/VitorVilela7/SA1-Pack)) + +What is it? +=========== + +SA-1 is a co-processor used on some special SNES games, made to work together +with the Super NES CPU and enhance its processing speed, graphics and memory. + +With its base 10.74 MHz clock, the SA-1 CPU is four times faster than the +normal SNES CPU processing. The SA-1 CPU and SNES CPU also runs +simultaneously, which can result in five times faster processing over game with +a standard cart setup. With that much power, the Super Accelerator System (SAS) +can be used to process game engines much faster than the normal, allowing more +sprites to be processed at once, more in-game effects, faster loading and much +more. + +SA-1 Root not just activates the co-processor, but also modifies a good part of +the game engine to use and explore the chip features, which gives an extreme +boost to the overall performance of the game. + +## System Features +* 16-bit 65c816 processor clocked at 10.74 MHz. +* 2 kB fast internal work memory (I-RAM), clocked at 10.74 MHz. +* Multi-processor processing, with parallel operating mode and memory sharing +control. +* Large capacity memory, with a total capability of 8 MB of ROM clocked at +10.74 MHz and 256 kB of BW-RAM, clocked at 5.37 MHz. +* High speed arithmetic hardware of multiplication, division and cumulative +sum. +* Bitmap and Character Conversion functions for fast graphics manipulation. +* Custom DMA circuit for fast transfers between ROM, I-RAM and BW-RAM. +* Variable-Length Bit data processing for enhanced algorithms such as graphics +and data compression. +* Super MMC memory mapping capabilities for BW-RAM and bank switching for +multiple ROM image access and mirroring. + +## Differences with SA-1 Pack + +SA-1 Root is intended to be the base pack for enabling SA-1 on the games +and optimizing it. SA-1 Pack is intended to be a full featured pack that +not just enables SA-1 and accelerate the game, but also improve the game +engine and provide additonal tools for ROM hacking. + +For example, Super Mario World's SA-1 Pack doubles the maximum phisical +amount of allowed enemies on screen and includes different shared +routines for additional SA-1 features. + +Compatibility +============= + +SA-1 Root is warranted to work with real hardware, including SA-1 carts +plus the most up-to-date SNES emulators including bsnes and Snes9x. + +ZSNES is not compatible with the SA-1 Root patches. + +Credits +======= + +SA-1 Root wouldn't be that awesome without help from these people: + +* indcsion (additional testing) +* Vitor Vilela (crazy author that did most of the patches) +* You (for using it :D) + +Useful Links +============ + +#### Technical documents + +Useful documents for understanding SA-1: + +* SNES Dev. Book: https://www.romhacking.net/docs/226/ +* SA-1 Registers: https://wiki.superfamicom.org/sa-1-registers +* SA-1 Doc: https://github.com/VitorVilela7/SNES-SA-1-doc/ + +#### Personal + +You can contact make though the following links: + +* My Github profile: https://github.com/VitorVilela7 +* My Twitter profile: https://twitter.com/HackerVilela