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Re: Roland MPU-401 more ROM dumps and info

I've dumped MPU versions 1.3, 1.3A, 1.5A, and 1.5A_JMSC. The 1.5A version was found in an earlier, upgraded MPU-401, and matches the MAME dump. The (8KB) "JMSC" version was found in a couple of "tester" MPU-401 units. Roland's integrated MPU-401 daughterboard, the RJA-401-HB, contains MPU version …

Re: Update SC-55 ROM

keropi wrote on 2024-09-17, 13:31: Karmeck wrote on 2024-09-17, 12:56: So, this was a little big. The seller tells me to bend the legs? Is this a tested method? which is the original chip? the one with the 3 blobs? that looks like a combo chip used for something else... That is somthing els. The …

Re: Update SC-55 ROM

Would this one suffice? https://www.tradera.com/item/408322222 What is that "70" at the end of the name? yes it will be perfect -70 is the speed rating in ns - it is a faster eeprom than needed so no issues there So, this was a little big. The seller tells me to bend the legs? Is this a tested …

Mattw gone missing, can we check if he is okay?

in Milliways
Asked permission from DosFreak befor crating this thread. https://www.vogons.org/memberlist.php?mode=viewprofile&u=42147 I had an ongoing project with mattw, we talked here and later over email. Then, after the 8th of June, he stopped responding. That is also the last day he was logged in here. Now, …

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