Capcom CPS1 / CPS2 Games

[channelmaniac]

Model: Captain Commando
Symtpom: Dead

C board was bad. Replaced with a compatible C board with a CPS-B-21 chip from a Street Fighter II game.

[channelmaniac]

Model: Punisher
Symptom: Dead

Phoenixed the Q-Sound board and the C board. Replaced the 8 1Mb EPROMs on the ROM board (B board) with 2 4Mb EPROMs containing the phoenix code.

[channelmaniac]

Model: Punisher
Symptom: Board crashes with Address Error at FFFF8F68

Board had "PSE" version code on 8 1Mb EPROMs and not "PSU" code. The phoenix code is based on PSU ROMs and mixing the ROMs resulted in the error code.

Replace the 8 1Mb EPROMs with 2 4Mb 16 bit EPROMs with the 16 bit version of the Phoenix code to resolve this error.

[channelmaniac]

Model: Cadillacs and Dinosaurs
Symptom: Dead. Board suicided.

Replaced the ROM on the QSound board with a 27C020 programmed with the phoenix code. Modified board to use the code. Modified the C board and reprogrammed 2 EPROMs on the B board with phoenix code to finish resurrecting the game.

[channelmaniac]

Model: Punisher
Symptom: Dead. Board suicided.

Replaced the ROM on the QSound board with a 27C020 programmed with the phoenix code. Modified board to use the code. Modified the C board and reprogrammed 5 EPROMs on the B board with phoenix code and replaced 3 slow EPROMs (Replaced 175ns with 120ns) to finish resurrecting the game.

[channelmaniac]

Model: CPS1
Tip: Troubleshooting Sync Problems

If the CPS1 board works, but has no sync then this will apply. This will not apply if the game is not otherwise working OK.

The sync pulses are generated by the custom chip on the C board. Pins 118 and 116 on the C board carry the signal to pins 13 and 12 of the 74LS08 on the B board, directly under the C board. This chip ANDs the signals and the output pin, pin 11, connects to resistor R28 (on the smaller SMT style A board), then on to the sync pin of the JAMMA connector.

If the board is missing sync, first check for damage on R28 (220 ohm) and continuity to pin 11 of the 74LS08 on the B board. If those are good then check for pulses on pins 116 and 118 of the C board. If the pulses are there on BOTH pins and missing from pin 11 of the 74LS08, then replace the 74LS08. If one or more pulses are missing and the pins stuck low on 116/118 of the C board then reflow the custom chip on the C board. If that fails to fix the sync problem then replace the faulty C board.

[channelmaniac]

Model: Captain Commando
Symptom: Dead

Unit has a suicide battery on it. Modified the C board then reprogrammed the 22 and 23 EPROMs with suicide free code. Tested the game.

[channelmaniac]

Model: Cadillacs and Dinosaurs
Symptom: Dead

Reprogrammed the 22 and 23 EPROMs with suicide free code. Modified the C board and Q-Sound boards. Replaced the 27C010 on the Q-Sound board with a 27C020 programmed with suicide free code.

[channelmaniac]

Model: Punisher
Symptom: Dead

Replaced 5 slow EPROMs with proper ones programmed with suicide free code. Modified the C board and Q-Sound boards. Replaced the 27C010 on the Q-Sound board with a 27C020 programmed with suicide free code.

[channelmaniac]

Model: Punisher
Symptom: Dead

Replaced 5 slow EPROMs with proper ones programmed with suicide free code. Modified the C board and Q-Sound boards. Replaced the 27C010 on the Q-Sound board with a 27C020 programmed with suicide free code.

[channelmaniac]

Model: CPS1 Games
Tip: ROM speeds

When reprogramming EPROMs to run the phoenix version of code on the CPS-1 boards, the EPROMs on the board may need replacing. The AMD EPROMs labeled -155 (155ns) and -175 (175ns) are just fast enough to run the regular code. When running the phoenix code on these EPROMs the game may crash randomly.

When using AMD EPROMs, use 120ns or faster for EPROMs running the phoenix code. Intel EPROMs rated at -15 (150ns) will run fine. Any AMD EPROMs that do not need reprogramming are fine to keep using.

[channelmaniac]

Model: Capcom CPS2 A board
Symptom: Low audio

Board shows the audio being up all the way in the test menu, but the audio is very low. Powered up the game with the volume down button held down to reset the audio levels. Adjusted audio and tested.

[channelmaniac]

Model: Super Street Fighter II Turbo (CPS2)
Symptom: Dead

Board would display a solid green screen. Removed battery and reprogrammed the EPROMs with the phoenixed version of code to resurrect the game. Tested.

[channelmaniac]

Model: Capcom CPS2 cartridged
Tip: Trouble when phoenxing

When the CPS2 carts are being phoenixed the chip that does the decoding sometimes has a corrupted key in memory. AFTER cutting the battery off the board, take something, such as a pair of hemostats or Kelly clamps and short across capacitor CCI for several seconds. This is the capacitor next to the positive lead of the battery. This will kill the battery backed memory on the cartridge and allow the phoenixed code to work as designed.

[channelmaniac]

Model: Street Fighter 2
Symptom: Graphics corruption

Game had corrupt player graphics and missing health bar segments. Replaced faulty A board and tested.

[channelmaniac]

Model: Saturday Night Slam Masters
Symtpom: Dead - Suicided

Modified the C-board and replaced the EPROM at position 23 of the B board with one programmed with suicide free code. Modified the Q-Sound board with a 4002 IC and replaced the 27C010 EPROM with a 27C040 programmed with suicide free code. Tested.

[channelmaniac]

Model: Marvel Vs. Capcom, Asia Region
Symptom: Dead

Removed the dead battery. Reprogrammed the game ROMs with the MVCA Phoenix code and tested.

[channelmaniac]

Model: Marvel Vs. Capcom, US Region
Symptom: Dead

Removed the dead battery. Reprogrammed the game ROMs with the MVCU Phoenix code and tested.

[channelmaniac]

Model: Captain Commando
Symptom: Dead

Performed suicide fix on C board and reprogrammed the 22 and 23 ROMs. Replaced a missing graphics ROM in socket 1. Tested board and found the game had corrupt graphics. 2 data lines on ROMs in sockets 1, 2, 5, and 6 were stuck low. Traced the problem back to a bad chip on the C board. Modified the C board from a Street Fighter II game that had the same chip (CPS-B-21) and installed it to fix the graphics problem. Tested board.

[channelmaniac]

Tip: Modifying C boards

Captain Commando uses the 90631C-5 labeled C board while some versions of Street Fighter II uses the 92631C-6 and they both have the CPS-B-21 chip on them. This version of SFII is easy to identify as it has the blank spot for the suicide battery on it.

To modify the SFII board cut the ground trace going to pin 42 and 44 of the CPS-B-21 chip. Pins 45 and 46 are already tied high so they do not need to be modified as on the Capt Commando C board. Install 1K SMT resistors at locations R1 and R2. These can be pulled from the bad C board and transferred over.

Ensure that there are no shorts between +5v and ground then install the board and test the game!

[channelmaniac]

Model: Punisher
Symptom: Dead

Game had suicided. Removed the 2 lithium batteries from it, modified the C board, and modified the Q-sound board. The existing EPROMs on the B board (-175) were too slow to be reused and were replaced with 120ns (-12) EPROMs programmed with suicide free code. Installed a replacement EPROM programmed with suicide free code on the Q-sound board.

[channelmaniac]

Model: Punisher
Symptom: Dead

Game had suicided. Removed the 2 lithium batteries from it, modified the C board, and modified the Q-sound board. The 5 existing EPROMs on the B board (-175) were too slow to be reused and all 8 were replaced with 2 x 16 bit, 120ns (-12) EPROMs programmed with suicide free code. Installed a replacement EPROM programmed with suicide free code on the Q-sound board.

[channelmaniac]

Model: X-Men COTA
Symptom: Dead

Board had suicided and battery has leaked. Removed battery and one capacitor. Cleaned battery damaged area and installed a new cap. Installed 8 EPROMs programmed with the phoenix code and tested.

[channelmaniac]

Model: Captain Commando
Symptom: Suicided

Removed battery, modified C board, and replaced 2 EPROMs with ones programmed with suicide free code. Tested.

[channelmaniac]

Model: CPS2 A board
Symptom: White screen

Board had damaged pins on one connector. Replaced bad connector and tested.