 No.19132
Steve Coomber Tester
Aug 3, 2021, 14:03
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Good spot. Progress and Time Limit both appear to be running too fast as advised. The timelimt.cpp driver has the main Z80 CPU running at 5Mhz. That seems a little fast considering the rated specification for Z80 - 2.5MHz, Z80A - 4MHz. I can't find any schematics or relevant details online for time limit or progress. Is the main Z80 CPU clock speed in the driver too high? |
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 No.19133
jkburks Tester
Aug 3, 2021, 14:50
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Hardware discussion and programming is above my level of understanding, so I can't really comment on CPU clock speeds... I posted a Time Limit pcb video link on reddit along with most of the information I have on that game: https://www.reddit.com/r/MAME/comments/ou2vkd/time_limit_chuo_co_ltd_1983/ This was in response to the Haze stream comments about the game running too fast, but I did not make a Mametesters report at the time. I knew these 2 games ran on the same driver, but have been too busy with other things to look into Progress. Then this morning I noticed that happppp made a commit to timelimt.cpp. It is not easy to find hardware reference for games like this, so I opened the report to add the Progress hardware video so that other testers could compare them. |
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No.19134
Steve Coomber Tester
Aug 3, 2021, 16:12
edited on: Aug 3, 2021, 16:13
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Actually, I was throwing the question about the CPU clock speed out there for anyone to answer as I wasn't sure myself. However, I have grabbed the latest build in github and it does look like the issue has been resolved by happppp so we should be able to be mark this issue as resolved. |