Stamina

References

1. ^ abLittle Mac's hearts in the NES Rev 1 are a two-digit decimal count. Glass Joe's fight data, in its comments, starts rounds 1, 2, and 3 at 20, 20, and 15 hearts, with normal recoveries of 15, 15, and 10 and reduced ones of 9, 9, and 5. The round setup routine, uncommented (it also loads the round's clock rate and starts the round timer), sets hearts to the table's value in round 1 and raises them to it in rounds 2 and 3 if they're lower, and it copies the two recovery values for the round. An uncommented routine at $843E takes hearts away, 1 or 3 at each of its six callers; when the count reaches zero or below it clears MacCanPunch, which the define reads as "Little Mac can't punch".Codenmikstas/mike-tysons-punch-out-disassembly
   How we know

   1100;Glass Joe Fight data. Loaded into $05A0 through $05FF.
   ⋮
   1104L931C:  .byte $20               ;Starting number of hearts, round 1(base 10).
   1105L931D:  .byte $15               ;Normal heart recovery, round 1(base 10).
   1106L931E:  .byte $09               ;Reduced heart recovery, round 1(base 10).
   1107L931F:  .byte $20               ;Starting number of hearts, round 2(base 10).
   1108L9320:  .byte $15               ;Normal heart recovery, round 2(base 10).
   1109L9321:  .byte $09               ;Reduced heart recovery, round 2(base 10).
   1110L9322:  .byte $15               ;Starting number of hearts, round 3(base 10).
   1111L9323:  .byte $10               ;Normal heart recovery, round 3(base 10).
   1112L9324:  .byte $05               ;Reduced heart recovery, round 3(base 10).
   

   207.alias HeartTable       $05A3   ;Table of heart values for this fight. (Indexing starts at 3)
   

   2733LB5A9:  LDA #$01
   2734LB5AB:  STA MacCanPunch
   2735LB5AD:  LDA RoundNumber
   2736LB5AF:  CMP #$04
   2737LB5B1:  BCC $B5B6
   2738LB5B3:  JMP $B621
   2739LB5B6:  ASL
   2740LB5B7:  ADC RoundNumber
   2741LB5B9:  TAX
   2742LB5BA:  CMP #$03
   2743LB5BC:  BEQ $B5CB
   2744LB5BE:  LDA HeartTable,X        ;($05A3)
   ⋮
   

   514L843E:  TAX
   515L843F:  LDA CurHeartsLD
   516L8442:  ORA CurHeartsUD
   517L8445:  BEQ $849E
   518L8447:  TXA
   519L8448:  SEC
   520L8449:  STA $E7
   521L844B:  LDA CurHeartsLD
   522L844E:  SBC $E7
   523L8450:  BCS $8455
   524L8452:  ADC #$0A
   525L8454:  CLC
   ⋮
   

   109L80D1:  LDA #$01
   110L80D3:  JSR $843E
   

   163L8143:  LDA #$03
   164L8145:  JSR $843E
   

   94.alias MacCanPunch      $BC     ;#$00=Little Mac can't punch, #$01=Little Mac can punch.
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   In the claim ledger

2. ^ abIn the US release, toolToFatigueScore gives each tool a stamina cost per charge level: the sickle and hoe 2, 4, and 6; the ax and hammer 1, 2, and 3; the watering can 1, 2, and 6; the milker, bell, brush, clippers, the seed bags, and grass seeds 1; the rest 0. Releasing B subtracts the cost from stamina. If it is raining or snowing, or the hour is before 6:00 or from 18:00, and the player isn't in the greenhouse, the same cost is added to fatigue (out of 100), or half of it once a life-event flag the decompilers name KAPPA_POWER_NUT_GIFT is set. Holding B raises the charge level each time a hold counter reaches 16, up to the tool's upgrade level, while stamina covers the next level's cost.Codeharvestwhisperer/hm64-decomp
   How we know

   291    { 2, 4, 6 },
   292    { 2, 4, 6 },
   

   61#define WATERING_CAN 5
   

   1635                if (((SUNNY < gWeather && gWeather < 4) || !(5 < gHour && gHour < 18)) && gBaseMapIndex != GREENHOUSE) {
   

   8#define SNOW 3
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   In the claim ledger

3. ^ abIn the US release, going to bed refills stamina to its maximum and, unless fatigue is at 100, takes 2 points of fatigue off for each hour of sleep before 6:00, 3 with the cushion (life event HAVE_CUSHION): the hour taken is the bedtime, plus 24 if before 6:00, subtracted from 30. Staying up until 6:00 runs the next day's update by another path that doesn't touch stamina or fatigue. Food and drink add the item's stamina value and take off its fatigue value.Codeharvestwhisperer/hm64-decomp
   How we know

   2531                gPlayer.fatigueCounter += adjustValue(gPlayer.fatigueCounter, -((30 - tempTime) * 2), 100);
   

   3254                    handleExitLevel(8, END_OF_DAY_1);    
   

   61            handleExitLevel(1, END_OF_DAY_2);
   

   2600        startNewDay();
   

   1791            gPlayer.currentStamina += adjustValue(gPlayer.currentStamina, getItemStaminaIncreaseValue(gPlayer.heldItem), gMaximumStamina);
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   In the claim ledger