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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08046 Original Reference Minor Always Aug 3, 2021, 12:50 Aug 4, 2021, 05:44
Tester jkburks View Status Public Platform MAME (Official Binary)
Assigned To hap Resolution Fixed OS Windows 10 (64-bit)
Status [?] Resolved Driver
Version 0.234 Fixed in Version 0.235 Build 64-bit
Fixed in Git Commit f6c71a1 Github Pull Request #
Summary 08046: progress, timelimt: Reference PCB video
Description Adding video link to assist the recent efforts to correct the speed issues on the Time Limit driver. This PCB output video confirms that the enemies in Progress move too fast in MAME. It is the only online hardware video I am aware of for this game.
I have not had a chance to fully compare the video to MAME or the recent github commit to see if anything else needs adjustment.
Steps To Reproduce
Additional Information
Github Commit
Regression Version
Affected Sets / Systems progress, timelimt
Attached Files
There are no relationship linked to this issue.
User avatar
Steve Coomber
Aug 3, 2021, 14:03
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?
User avatar
Aug 3, 2021, 14:50
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:
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.
User avatar
Steve Coomber
Aug 3, 2021, 16:12
edited on: Aug 3, 2021, 16:13
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.