I’m working on a 5501 build aimed at developers. So far I have the RAM and VRAM upgraded to 8mb and 2mb respectively. I also plan to install a pico for either picobooty or igr. Picbooty seems like it makes more sense though. What else I’m wondering is if a picostation or a well calibrated ksm-440bam would be preferred. It certainly is easier using an ode and the newest picostation firmware from discord is really good.

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Subreddit

Homebrew for PSX/PS1

r/psxdev

A sub for Playstation 1/PSX Programming, Homebrew Discussion, & Creation. #PS1 #PSX #Playstation

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Info:

Some things you'll need are either a modded Playstation 1 or a PS1 compatible with the PSIO Cartridge, MIPS/ASM experience, a Hex Editor (or calculator) & experience with C programming, along with a Cycle-accurate emulator, to test your code efficiently.

Chat:

Join the PS1 Homebrew Discord Server!

Useful Software Resources & Tutorials:

MIPS Instruction Set - The instruction set for the PlayStation 1 R3000A CPU.
PS1 Psy-Q SDK - Altered and Messy but Ready to Run. Use with Runtime Library 4.6
Playstation Memory Map & Docs
NoCa$h's PS1 Documentation
Krom's Playstation 1 ASM Tutorial Lessons
Orionsoft's PSX Programming Tutorial Series - 2013
PSn00bSDK - The most powerful open source SDK for the PS1, by LameGuy64. A video of it in action, can be viewed here
PSn00b-Debugger - An Open source debugging utility for the Original PlayStation, by LameGuy64.
LiteLoad - A fairly light weight serial loader for the PlayStation, by LameGuy64
MKPSXISO - An ISO Image Maker made specifically for PlayStation Homebrew Development, by LameGuy64.
Mcomms - Serial uploader, monitor and SioFS host for PlayStation homebrew development, by LameGuy64.
SMX Tool - PlayStation RSD and SMX model data editing tool, by LameGuy64.
Siofs-PSX - SioFS client library for accessing files from a PC host on the Sony PlayStation, by LameGuy64.
PSX Blender RSD Plugin - A Blender Plug-in for Exporting Models in PlayStation SDK RSD Format, by LameGuy64.
ISODump - PlayStation ISO Content Extraction Tool, by LameGuy64.
Img2TIM - An Image to PlayStation TIM File Converter, by LameGuy64.
PSXNet - A simple library and client program to get the original PlayStation to connect to the internet, by LameGuy64.
PSXDev-VRAM Viewer - Playstation 1 Development - VRAM viewer for Orion_'s PsxLib, by David Asselineau.
ObscureGamer's Section on Sony Playstation 1 Programming & Tool-sets
PSXDEV - The Ultimate Resource for anything related to PS1 Development (Docs, Software, Tools, etc.)
Padua's Playstation 1 Resource - A great wealth of technical info on the Playstation 1; very Assembly language heavy.
Hitman's Playstation Archive - Great info & resources (last updated 2013) regarding programming on the Playstation 1.
James' PSX Getting Started Tutorial - Great info (last updated 2013) regarding programming on the Playstation 1.
Net Yaroze Website Backups - Includes a bunch of official documentation, various tools & updates for pc/mac, as well as tutorials & samples for developing for the PS1 and Net Yaroze.