| ID | Category [?] | Severity [?] | Reproducibility | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 06732 | Gameplay | Minor | Always | Oct 25, 2017, 03:38 | Oct 25, 2017, 10:18 |
| Tester | mr_me | View Status | Public | Platform | MAME (Unofficial Binary) |
| Assigned To | Resolution | Bugs That Aren't Bugs | OS | Windows Vista/7/8 (64-bit) | |
| Status [?] | Resolved | Driver | |||
| Version | 0.188 | Fixed in Version | Build | 64-bit | |
| Fixed in Git Commit | Github Pull Request # | ||||
| Summary |
 06732: ti99_4a: Joystick "up" direction does not work |
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| Description | All joystick functions work except up (ie. left, right, down, fire). I tested using a usb game controller and the keyboard up arrow. I tried remapping the up function to another key and that didn't work | ||||
| Steps To Reproduce |
Start a game and try playing it. I tried Parsec and Donkey Kong. |
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| Additional Information | |||||
| Github Commit | |||||
| Flags | |||||
| Regression Version | |||||
| Affected Sets / Systems | ti99_4a | ||||
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 No.14323
Osso Moderator
Oct 25, 2017, 09:08
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Are you using the TI-99/4A? According to the driver: The hardware bug of the TI-99/4A: you have to release the Alphalock key when using joysticks. This is a maldesign of the board: When none of the other keyboard lines are selected the depressed Alphalock key pulls up the /INT7 line which is also used for joystick up. The joystick switch then fails to lower the line enough to make the TMS9901 sense the low level. |
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 No.14324
Tafoid Administrator
Oct 25, 2017, 10:18
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This is a confirmed BTANB. Having owned a TI 99-4a for a long time I can attest to the fact about a seemingly malfunctioning joystick up due to Alpha Lock key. |