August 16, 2021 @ 7:09 AM UTCmikejmoffitt removed a repair tip from Cave CV1000
Old Tip Contents
Flickering pixels on edges of sprites
Later CV1000 games, like Mushihimesama Futari, feature a bodge capacitor installed from the factory. Without this capacitor, the leading edge (i.e. bottom side when vertical) of a sprite's source data may have flickering pixels.
The capacitor is an 0603 package 56pF capacitor. It connects between ground and pin 16 of the VRAM at U6.
November 20, 2019 @ 9:32 AM UTCmikejmoffitt added a repair tip to Cave CV1000
Original Tip Contents
CPU stuck in boot loop, nothing on screen
If the CPU is stuck with the LED at D6 lit, pulsing every second or so to a slightly darker color, ensure that the SH3 RTC crystal at X2 is intact and oscillating. It is a 32.768KHz crystal. This is not to be confused with the RTC-EEPROM at U10, which has its own internal crystal.
November 20, 2019 @ 8:15 AM UTCmikejmoffitt updated a repair tip on Cave CV1000
New Tip Contents
Flickering pixels on edges of sprites
Later CV1000 games, like Mushihimesama Futari, feature a bodge capacitor installed from the factory. Without this capacitor, the leading edge (i.e. bottom side when vertical) of a sprite's source data may have flickering pixels.
The capacitor is an 0603 package 56pF capacitor. It connects between ground and pin 16 of the VRAM at U6.
Old Tip Contents
Flickering pixels on edges of sprites
Later CV1000 games, like Mushihimesama Futari, feature a bodge capacitor installed from the factory. Without this capacitor, the leading edge (i.e. bottom side when vertical) of a sprite's source data may have flickering pixels.
The capacitor is an 0603 package 50pF capacitor. It connects between ground and pin 16 of the VRAM at U6.
November 20, 2019 @ 8:13 AM UTCmikejmoffitt added a repair tip to Cave CV1000
Original Tip Contents
Flickering pixels on edges of sprites
Later CV1000 games, like Mushihimesama Futari, feature a bodge capacitor installed from the factory. Without this capacitor, the leading edge (i.e. bottom side when vertical) of a sprite's source data may have flickering pixels.
The capacitor is an 0603 package 50pF capacitor. It connects between ground and pin 16 of the VRAM at U6.
November 20, 2019 @ 8:07 AM UTCmikejmoffitt added a repair tip to Cave CV1000
Original Tip Contents
Filter cap leakage
The large electrolytic capacitor in the top-left corner has been seen leaking, causing minor corrosion. Unless it has been left unattended for a long time, repair of the corrosion should be very easy,.
The capacitor is located at C901, and is rated for 2200uF at 25v.
November 20, 2019 @ 8:05 AM UTCmikejmoffitt updated Cave CV1000
New Description
CV1000 is Cave's last dedicated JAMMA hardware platform. It features an SH3 CPU, a CyClone EP1C12 FPGA acting as a framebuffer, and a YMZ770C audio decoder for streaming compressed audio.
Old Description
November 20, 2019 @ 8:04 AM UTCmikejmoffitt updated Cave CV1000
changed the date range from "2019-2019" to "2019-2004"
November 20, 2019 @ 8:04 AM UTCmikejmoffitt updated Cave CV1000
changed the developer from "" to "Cave"
November 20, 2019 @ 8:04 AM UTCmikejmoffitt added Cave CV1000 to the wiki