chipped PS1 and PS2 consoles for sale via minifree.org (and PS1 PSIO installs)
Posted: February 7th, 2020, 9:22 pm
HI everyone,
I'm relatively new to the scene. Recently I've been modding PS1s and PS2s
I sell them here:
https://minifree.org/consoles/
PS2s have the modbo4 modchip allowing to play burned CD-R/DVD-R games
PS1s have the 8wire MM3 modchip aswell as: CSYNC mod, dual PAL/NTSC oscillators for correct PAL/NTSC vsync timings
All consoles come with RGB SCART cable, controller, memory card and power cable. I also do general refurbishments; e.g. replace broken fuses, broken caps etc. I also clean the DVD/CD laser and adjust trimpot so that they read discs again like new.
"CSYNC" (composite sync) replaces composite video and luma (so composite video and svideo won't work anymore). Composite Sync is what's used to sync the display so that you get a stable image. Normally it's extracted from either the luma or composite video channel, but with some interference issues. It's used on RGB SCART output.
RGB SCART cables usually get sync from luma or composite video, so what I've done is:
hooked up a 470ohm resistor and 220uF capacitor in series to pin 156 of the GPU which is TTL csync. the resistor and cap attenuates it so that it's at 75ohm transmission level, ready for common TVs/upscalers. No sync stripper required!
RGB with pure csync is the best way to get the best possible picture quality. You wouldn't really notice any issues on a CRT TV without the csync mod, but on flat screen TVs using an upscaler you'd notice serious interference issues in the video output. With the csync mod, modern HDTVs look great on PS1 games.
For PS2 I don't really bother with CSYNC that much. sync on luma still looks great and the PS2 also supports Sync on Green, which some upscalers (e.g. OSSC) support and you can use Component Video cables on PS2 which look great.
As for the dual PAL/NTSC oscillator:
These are PAL PS1s, which have the 53.2mhz oscillator by default. This is correct for PAL and feeds into the GPU's PAL clock input (pin 192). However, it's also hooked up to pin 196 (NTSC clock input). I cut the trace leading to pin 196 and connect a 53.69mhz oscillator instead. Without this mod, NTSC games would have vsync of about 59.3hz which is off-spec. With this mod, they are closer to 59.9hz which fixes game compatibility and also fixes compatibility with certain upscalers e.g. framemeister
Here are two YouTube videos I did, showing how I do the mods.
PS1: https://www.youtube.com/watch?v=618PsJKPxLI
PS2: https://www.youtube.com/watch?v=lWZxDqfPERw
I ship worldwide from my lab in the UK.
I'm relatively new to the scene. Recently I've been modding PS1s and PS2s
I sell them here:
https://minifree.org/consoles/
PS2s have the modbo4 modchip allowing to play burned CD-R/DVD-R games
PS1s have the 8wire MM3 modchip aswell as: CSYNC mod, dual PAL/NTSC oscillators for correct PAL/NTSC vsync timings
All consoles come with RGB SCART cable, controller, memory card and power cable. I also do general refurbishments; e.g. replace broken fuses, broken caps etc. I also clean the DVD/CD laser and adjust trimpot so that they read discs again like new.
"CSYNC" (composite sync) replaces composite video and luma (so composite video and svideo won't work anymore). Composite Sync is what's used to sync the display so that you get a stable image. Normally it's extracted from either the luma or composite video channel, but with some interference issues. It's used on RGB SCART output.
RGB SCART cables usually get sync from luma or composite video, so what I've done is:
hooked up a 470ohm resistor and 220uF capacitor in series to pin 156 of the GPU which is TTL csync. the resistor and cap attenuates it so that it's at 75ohm transmission level, ready for common TVs/upscalers. No sync stripper required!
RGB with pure csync is the best way to get the best possible picture quality. You wouldn't really notice any issues on a CRT TV without the csync mod, but on flat screen TVs using an upscaler you'd notice serious interference issues in the video output. With the csync mod, modern HDTVs look great on PS1 games.
For PS2 I don't really bother with CSYNC that much. sync on luma still looks great and the PS2 also supports Sync on Green, which some upscalers (e.g. OSSC) support and you can use Component Video cables on PS2 which look great.
As for the dual PAL/NTSC oscillator:
These are PAL PS1s, which have the 53.2mhz oscillator by default. This is correct for PAL and feeds into the GPU's PAL clock input (pin 192). However, it's also hooked up to pin 196 (NTSC clock input). I cut the trace leading to pin 196 and connect a 53.69mhz oscillator instead. Without this mod, NTSC games would have vsync of about 59.3hz which is off-spec. With this mod, they are closer to 59.9hz which fixes game compatibility and also fixes compatibility with certain upscalers e.g. framemeister
Here are two YouTube videos I did, showing how I do the mods.
PS1: https://www.youtube.com/watch?v=618PsJKPxLI
PS2: https://www.youtube.com/watch?v=lWZxDqfPERw
I ship worldwide from my lab in the UK.