Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08673 DIP/Input Minor Always Jun 19, 2023, 22:06 Jun 21, 2023, 12:34
Tester Balthier View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10/11 (64-bit)
Status [?] Acknowledged Driver
Version 0.255 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08673: harddriv and clones: Service Mode Self Test shows "BAD GSP VRAM", "BAD SOUND WAVE ROM CHECKSUMS", Operator Screen errors
Description The self test run when the game is put into service mode displays a red message "BAD GSP VRAM". Running the associated VRAM SHIFT REGISTER TEST in the SPECIAL FUNCTIONS -> MAIN BOARD GSP TESTS menu shows red blocks related to the vram. All other tests show these as green.

Self test also shows "BAD SOUND WAVE CHECKSUMS", and running the sound tests also confirm this.

There are also errors on some screens when cycling through the OPERATOR SCREENS. These can be cleared (hold 2 key and press 1) and don't ever return, but they are always present from the first time the game is run until you clear them.
Steps To Reproduce 1. Run harddriv or any of its clones.
2. Let it run for a minute or so, then press F2 or just change the dipswitch setting for Service Mode to ON.
3. Let it run the self test, do not press start to skip it. After a bit you should see some messages and a red "BAD GSP VRAM" and "BAD SOUND WAVE ROM CHECKSUMS".
4. Tap 1 to get through the next screens, use 5 and 6 to navigate and press 1 to go to the SPECIAL FUNCTIONS menu.
5. Now go to MAIN BOARD GSP TESTS -> VRAM SHIFT REGISTER TEST and run it. Should see a set of red blocks.
6. Tap 1 and find your way to SOUND BOARD TESTS -> SD ROM CHECKSUMS. Tap 1 but it is tricky. Hold too long and it jumps out of that menu, and if you tap the 1 key and let go too fast it won't work either. Should show the bad checksums once that test runs.
Additional Information For some reason some of the sound board menu options are very touchy when pressing the start button to enter them. I think there was one item where I had to hold the start button the whole time to see anything otherwise it would just exit back right away.

Attached images of the errors. Last image says in red text "BAD CHECKSUM DATA MAY BE INVALID", but is hard to read.
Github Commit
Regression Version
Affected Sets / Systems harddriv and clones
Attached Files
png file icon harddriv_errors.png (22,981 bytes) Jun 19, 2023, 22:06 Uploaded by Balthier
related to 08672Acknowledged  stunrun and clones: Self Test produces "BAD GSP VRAM" message in Service Mode, VRAM SHIFT REGISTER TEST shows vram is bad, Operator Screens errors 
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