aiden/h8-536-decoder
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further digging and basic emulator

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Aiden
2026-05-25 17:42:58 +10:00
parent 07f48c76e0
commit b264037e82
11 changed files with 1628 additions and 3 deletions
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256
build/rom_report_sources.json Normal file
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{
"calls": [
{
"address": 5622,
"address_hex": "H'15F6",
"assessment": "Direct static enqueue source for 0x0081, not 0x0007.",
"can_directly_enqueue_report_index": false,
"dataflow_block": 5609,
"function_label": "loc_15E0",
"function_start": 5600,
"function_start_hex": "H'15E0",
"instruction": "BSR loc_3E54",
"r2": {
"bit7": true,
"classification": "constant",
"evidence": {
"address": 5617,
"address_hex": "H'15F1",
"instruction": "MOV:E.B #H'80, R2",
"mnemonic": "MOV:E.B",
"operands": "#H'80, R2"
},
"reason": "immediate load",
"register": "R2",
"value": 128,
"value_hex": "0x80"
},
"r3": {
"classification": "constant",
"evidence": {
"address": 5619,
"address_hex": "H'15F3",
"instruction": "MOV:I.W #H'0081, R3",
"mnemonic": "MOV:I.W",
"operands": "#H'0081, R3"
},
"reason": "immediate load",
"register": "R3",
"value": 129,
"value_hex": "0x0081"
},
"table_hints": [],
"target": 15956,
"target_hex": "H'3E54",
"window_instruction_count": 4,
"window_start": 5609,
"window_start_hex": "H'15E9"
},
{
"address": 6673,
"address_hex": "H'1A11",
"assessment": "No static 0x0007 constant here; R3 is dynamic/table-derived.",
"can_directly_enqueue_report_index": false,
"dataflow_block": 6665,
"function_label": "loc_19DB",
"function_start": 6619,
"function_start_hex": "H'19DB",
"instruction": "BSR loc_3E54",
"r2": {
"bit7": true,
"classification": "constant",
"evidence": {
"address": 6669,
"address_hex": "H'1A0D",
"instruction": "MOV:E.B #H'80, R2",
"mnemonic": "MOV:E.B",
"operands": "#H'80, R2"
},
"reason": "immediate load",
"register": "R2",
"value": 128,
"value_hex": "0x80"
},
"r3": {
"classification": "dynamic/table-derived",
"evidence": {
"address": 6671,
"address_hex": "H'1A0F",
"instruction": "MOV:G.W R5, R3",
"mnemonic": "MOV:G.W",
"operands": "R5, R3"
},
"reason": "copied from unresolved R5",
"register": "R3",
"value": null,
"value_hex": null
},
"table_hints": [
{
"address": 6665,
"address_hex": "H'1A09",
"instruction": "MOV:G.W R1, @(-H'1800,R3)",
"operand": "@(-H'1800,R3)",
"table": "current_value_table_candidate"
}
],
"target": 15956,
"target_hex": "H'3E54",
"window_instruction_count": 3,
"window_start": 6665,
"window_start_hex": "H'1A09"
},
{
"address": 6777,
"address_hex": "H'1A79",
"assessment": "No static 0x0007 constant here; R3 is dynamic/table-derived.",
"can_directly_enqueue_report_index": false,
"dataflow_block": 6769,
"function_label": "loc_1A35",
"function_start": 6709,
"function_start_hex": "H'1A35",
"instruction": "BSR loc_3E54",
"r2": {
"bit7": true,
"classification": "constant",
"evidence": {
"address": 6773,
"address_hex": "H'1A75",
"instruction": "MOV:E.B #H'80, R2",
"mnemonic": "MOV:E.B",
"operands": "#H'80, R2"
},
"reason": "immediate load",
"register": "R2",
"value": 128,
"value_hex": "0x80"
},
"r3": {
"classification": "dynamic/table-derived",
"evidence": {
"address": 6775,
"address_hex": "H'1A77",
"instruction": "MOV:G.W R5, R3",
"mnemonic": "MOV:G.W",
"operands": "R5, R3"
},
"reason": "copied from unresolved R5",
"register": "R3",
"value": null,
"value_hex": null
},
"table_hints": [
{
"address": 6769,
"address_hex": "H'1A71",
"instruction": "MOV:G.W R0, @(-H'1800,R3)",
"operand": "@(-H'1800,R3)",
"table": "current_value_table_candidate"
}
],
"target": 15956,
"target_hex": "H'3E54",
"window_instruction_count": 3,
"window_start": 6769,
"window_start_hex": "H'1A71"
},
{
"address": 9896,
"address_hex": "H'26A8",
"assessment": "No static 0x0007 constant here; R3 is unknown.",
"can_directly_enqueue_report_index": false,
"dataflow_block": 9896,
"function_label": "loc_2650",
"function_start": 9808,
"function_start_hex": "H'2650",
"instruction": "BSR loc_3E54",
"r2": {
"bit7": null,
"classification": "unknown",
"evidence": null,
"reason": "decompiler dataflow: block_entry",
"register": "R2",
"value": null,
"value_hex": null
},
"r3": {
"classification": "unknown",
"evidence": null,
"reason": "decompiler dataflow: block_entry",
"register": "R3",
"value": null,
"value_hex": null
},
"table_hints": [],
"target": 15956,
"target_hex": "H'3E54",
"window_instruction_count": 0,
"window_start": 9896,
"window_start_hex": "H'26A8"
},
{
"address": 18726,
"address_hex": "H'4926",
"assessment": "Direct static enqueue source for 0x00f6, not 0x0007.",
"can_directly_enqueue_report_index": false,
"dataflow_block": 18709,
"function_label": "loc_48FA",
"function_start": 18682,
"function_start_hex": "H'48FA",
"instruction": "BSR loc_3E54",
"r2": {
"bit7": true,
"classification": "constant",
"evidence": {
"address": 18721,
"address_hex": "H'4921",
"instruction": "MOV:E.B #H'80, R2",
"mnemonic": "MOV:E.B",
"operands": "#H'80, R2"
},
"reason": "immediate load",
"register": "R2",
"value": 128,
"value_hex": "0x80"
},
"r3": {
"classification": "constant",
"evidence": {
"address": 18723,
"address_hex": "H'4923",
"instruction": "MOV:I.W #H'00F6, R3",
"mnemonic": "MOV:I.W",
"operands": "#H'00F6, R3"
},
"reason": "immediate load",
"register": "R3",
"value": 246,
"value_hex": "0x00F6"
},
"table_hints": [],
"target": 15956,
"target_hex": "H'3E54",
"window_instruction_count": 5,
"window_start": 18709,
"window_start_hex": "H'4915"
}
],
"caveats": [
"This is a bounded local static trace, not an emulator run.",
"R3 values classified as dynamic/table-derived may still become 0x0007 at runtime.",
"Indirect dispatch, table handlers, interrupt interleavings, or callers absent from the JSON may still enqueue 0x0007.",
"The generic queue-to-TX path only emits queued entries; this tracer looks for direct report-index sources at loc_3E54 callers."
],
"kind": "report_source_trace",
"queue_function": 15956,
"queue_function_hex": "H'3E54",
"report_index_of_interest": 7,
"report_index_of_interest_hex": "0x0007",
"summary": {
"conclusion": "No direct loc_3E54 caller in this JSON statically loads report index 0x0007. 0x0007 remains an observed runtime/capture value unless another indirect or table-dispatch path is proven.",
"direct_call_count": 5,
"direct_static_hit_count": 0,
"dynamic_or_unknown_candidate_count": 3,
"status": "not_statically_proven"
}
}

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H8/536 loc_3E54 Report Source Trace
Queue function: H'3E54
Report index of interest: 0x0007
Direct callers: 5
Direct static 0x0007 hits: 0
Dynamic/unknown candidates: 3
Conclusion: No direct loc_3E54 caller in this JSON statically loads report index 0x0007. 0x0007 remains an observed runtime/capture value unless another indirect or table-dispatch path is proven.
Call sites:
- H'15F6 in loc_15E0: R2.bit7=set, R3=0x0081 (constant); direct_0x0007=False
R2 evidence: H'15F1 MOV:E.B #H'80, R2
R3 evidence: H'15F3 MOV:I.W #H'0081, R3
- H'1A11 in loc_19DB: R2.bit7=set, R3=<dynamic> (dynamic/table-derived); direct_0x0007=False
R2 evidence: H'1A0D MOV:E.B #H'80, R2
R3 evidence: H'1A0F MOV:G.W R5, R3
table/context hints: H'1A09 current_value_table_candidate via @(-H'1800,R3)
- H'1A79 in loc_1A35: R2.bit7=set, R3=<dynamic> (dynamic/table-derived); direct_0x0007=False
R2 evidence: H'1A75 MOV:E.B #H'80, R2
R3 evidence: H'1A77 MOV:G.W R5, R3
table/context hints: H'1A71 current_value_table_candidate via @(-H'1800,R3)
- H'26A8 in loc_2650: R2.bit7=unknown, R3=<dynamic> (unknown); direct_0x0007=False
- H'4926 in loc_48FA: R2.bit7=set, R3=0x00F6 (constant); direct_0x0007=False
R2 evidence: H'4921 MOV:E.B #H'80, R2
R3 evidence: H'4923 MOV:I.W #H'00F6, R3
Caveats:
- This is a bounded local static trace, not an emulator run.
- R3 values classified as dynamic/table-derived may still become 0x0007 at runtime.
- Indirect dispatch, table handlers, interrupt interleavings, or callers absent from the JSON may still enqueue 0x0007.
- The generic queue-to-TX path only emits queued entries; this tracer looks for direct report-index sources at loc_3E54 callers.