| ID | Category [?] | Severity [?] | Reproducibility | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 09325 | Debugger | Minor | Always | 10 hours ago | 5 hours ago |
| Tester | jman | View Status | Public | Platform | MAME (Official Binary) |
| Assigned To | Resolution | Invalid report | OS | Windows (x64) | |
| Status [?] | Closed | Driver | |||
| Version | 0.283 | Fixed in Version | Build | x64 | |
| Fixed in Git Commit | Github Pull Request # | ||||
| Summary | 09325: r13 and r14 registers are always displayed with 0 and don't updated in ARM cpu. | ||||
| Description |
As far as I know, "r13" is stack pointer and "r14" is link register in ARM cpu. But "r13" and "r14" registers are always displayed with 0 and don't update even when "BL" (call sub-routine), "STMFD" (push) or "LDMFD" (pop) are executed. See screen shot. It is from charlien (dataeast/simpl156.cpp). "r13" is "0" after "LDR R13,&0000378" instead of "201200". |
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| Steps To Reproduce |
1) execute "mame -debug charlien" 2) press F11 2 times 3) check the value in r13 register |
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| Additional Information | I'm not sure about this problem due to my less knowledge for ARM cpu. If this is correct behavior, where should I look at stack pointer address? | ||||
| Github Commit | |||||
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Attached Files
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 No.23892
Robbbert Moderator
9 hours ago
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I don't know anything about that CPU either, so it's acknowledged. Perhaps someone who knows more can say. |
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 No.23893
hap Developer
9 hours ago
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Looks like SR13 updated here, presuming you're in the middle of a sw interrupt? No bug then. |
 No.23895
cuavas Administrator
5 hours ago
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A lot of arcade games run entirely in supervisor mode, so the user stack pointer won’t change. |