PSP Book Reader v1.9.0 by sabraman

Reads EPUB books, with a library that shows their covers and remembers your page in each one. There are Night, Sepia and Light themes, font size and margin settings, a chapter menu, and Circle turns the screen sideways for a tall 9:16 page. Chinese, Japanese and Korean books get their own font. The CPU drops to 66 MHz after two seconds without a button press to save battery.

Keep the fonts folder next to EBOOT.PBP.

- L and R: turn the page
- Triangle: chapters
- Circle: rotate
- Select: settings
- Start: back to the library

Release v1.9.0: The "Power Save" Update 🔋⚡

This release introduces dynamic power management to significantly extend PSP battery life during reading sessions.

Install

1. Download PSP-BookReader-v1.9.0.zip from the release assets.
2. Copy the included PSP-BookReader folder to PSP/GAME/ on your Memory Stick.
3. Keep the bundled fonts/ directory next to EBOOT.PBP.
4. Launch the app from the PSP Game menu.

🚀 Changes

🔋 Battery Optimization

• Dynamic Frequency Scaling (DFS):
• Automatically downclocks the CPU to 66MHz after 2 seconds of inactivity.
• Scales up to 222MHz for smooth UI interaction.
• Peaks at 333MHz for intensive tasks like library scanning.
• Frame rate throttling: Reduces main loop wake-ups when the device is idle, further saving power.
• Activity Detection: Intelligent input monitoring ensures the device stays at full speed whenever you are interacting with it.

⚡ Optimization & Stability (from v1.8.0)

• Stable I/O: Resolved excessive disk activity caused by high-frequency logging.
• Quiet Logger: Removed frequent flushes and reduced log noise for better performance.

🛠 Improvements

• Responsive Wake-up: Instant transition from power-save to performance mode upon any button press.
• System Longevity: Reduced heat and wear by running the hardware at lower clock speeds when idle.