mirror of
https://github.com/thornAvery/kep-hack.git
synced 2025-12-02 17:44:30 +13:00
disasm of number printing functions and other minor changes
hg-commit-id: ca84e561db2c
This commit is contained in:
YamaArashi
parent
8573d9f7bd
commit
1440cf9321
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@ -780,6 +780,12 @@ H_DIVISOR EQU $FF99 ; 1 byte
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H_QUOTIENT EQU $FF95 ; 4 bytes, big endian order
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H_REMAINDER EQU $FF99 ; 1 byte
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; used to convert numbers to decimal
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H_PASTLEADINGZEROES EQU $FF95 ; flag to indicate that a nonzero digit has been printed
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H_NUMTOPRINT EQU $FF96 ; 3 bytes, big endian order
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H_POWEROFTEN EQU $FF99 ; 3 bytes, big endian order
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H_SAVEDNUMTOPRINT EQU $FF9C ; 3 bytes, big endian order (to back out of a subtraction)
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; is automatic background transfer during V-blank enabled?
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; if nonzero, yes
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; if zero, no
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425
main.asm
425
main.asm
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@ -2846,7 +2846,85 @@ SwitchToMapRomBank: ; 12BC
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pop hl
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ret
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INCBIN "baserom.gbc",$12DA,$1627 - $12DA
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INCBIN "baserom.gbc",$12DA,$15CD - $12DA
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; function to print a BCD (Binary-coded decimal) number
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; de = address of BCD number
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; hl = destination address
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; c = flags and length
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; bit 7: if set, do not print leading zeroes
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; if unset, print leading zeroes
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; bit 6: if set, left-align the string (do not pad empty digits with spaces)
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; if unset, right-align the string
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; bit 5: if set, print currency symbol at the beginning of the string
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; if unset, do not print the currency symbol
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; bits 0-4: length of BCD number in bytes
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; Note that bits 5 and 7 are modified during execution. The above reflects
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; their meaning at the beginning of the functions's execution.
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PrintBCDNumber: ; 15CD
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ld b,c ; save flags in b
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res 7,c
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res 6,c
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res 5,c ; c now holds the length
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bit 5,b
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jr z,.loop\@
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bit 7,b
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jr nz,.loop\@
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ld [hl],$f0 ; currency symbol
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inc hl
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.loop\@
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ld a,[de]
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swap a
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call PrintBCDDigit ; print upper digit
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ld a,[de]
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call PrintBCDDigit ; print lower digit
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inc de
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dec c
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jr nz,.loop\@
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bit 7,b ; were any non-zero digits printed?
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jr z,.done\@ ; if so, we are done
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.numberEqualsZero\@ ; if every digit of the BCD number is zero
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bit 6,b ; left or right alignment?
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jr nz,.skipRightAlignmentAdjustment\@
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dec hl ; if the string is right-aligned, it needs to be moved back one space
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.skipRightAlignmentAdjustment\@
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bit 5,b
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jr z,.skipCurrencySymbol\@
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ld [hl],$f0 ; currency symbol
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inc hl
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.skipCurrencySymbol\@
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ld [hl],"0"
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call PrintLetterDelay
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inc hl
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.done\@
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ret
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PrintBCDDigit: ; 1604
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and a,%00001111
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and a
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jr z,.zeroDigit\@
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.nonzeroDigit\@
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bit 7,b ; have any non-space characters been printed?
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jr z,.outputDigit\@
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; if bit 7 is set, then no numbers have been printed yet
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bit 5,b ; print the currency symbol?
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jr z,.skipCurrencySymbol\@
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ld [hl],$f0 ; currency symbol
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inc hl
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res 5,b
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.skipCurrencySymbol\@
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res 7,b ; unset 7 to indicate that a nonzero digit has been reached
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.outputDigit\@
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add a,"0"
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ld [hli],a
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jp PrintLetterDelay
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.zeroDigit\@
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bit 7,b ; either printing leading zeroes or already reached a nonzero digit?
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jr z,.outputDigit\@ ; if so, print a zero digit
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bit 6,b ; left or right alignment?
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ret nz
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inc hl ; if right-aligned, "print" a space by advancing the pointer
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ret
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;XXX what does this do
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;XXX what points to this
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@ -3376,7 +3454,7 @@ Char55: ; 0x1a7c
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ld b,h
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ld c,l
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ld hl,Char55Text
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call $1B40
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call TextCommandProcessor
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ld h,b
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ld l,c
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pop de
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@ -3602,7 +3680,7 @@ TextCommand02: ; 1BA5
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ld h,b
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ld l,c
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ld c,a
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call $15cd
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call PrintBCDNumber
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ld b,h
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ld c,l
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pop hl
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@ -3690,7 +3768,7 @@ TextCommand09: ; 1BFF
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swap a
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set 6,a
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ld b,a
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call $3c5f
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call PrintNumber
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ld b,h
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ld c,l
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pop hl
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@ -6348,136 +6426,265 @@ PrintText: ; 3C49
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pop hl
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FuncCoord 1,14
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ld bc,Coord ;$C4B9
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jp $1B40
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jp TextCommandProcessor
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Func3C5F: ; 3C5F
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; converts a big-endian binary number into decimal and prints it
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; INPUT:
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; b = flags and number of bytes
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; bit 7: if set, do not print leading zeroes
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; if unset, print leading zeroes
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; bit 6: if set, left-align the string (do not pad empty digits with spaces)
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; if unset, right-align the string
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; bits 4-5: unused
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; bits 0-3: number of bytes (only 1 - 3 bytes supported)
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; c = number of decimal digits
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; de = address of the number (big-endian)
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PrintNumber: ; 3C5F
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push bc
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xor a
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ld [$FF95],a
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ld [$FF96],a
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ld [$FF97],a
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ld [H_PASTLEADINGZEROES],a
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ld [H_NUMTOPRINT],a
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ld [H_NUMTOPRINT + 1],a
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ld a,b
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and $F
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cp 1
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jr z,.next\@
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cp 2
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jr z,.next2\@
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and a,%00001111
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cp a,1
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jr z,.oneByte\@
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cp a,2
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jr z,.twoBytes\@
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.threeBytes\@
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ld a,[de]
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ld [$FF96],a
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ld [H_NUMTOPRINT],a
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inc de
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ld a,[de]
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ld [$FF97],a
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ld [H_NUMTOPRINT + 1],a
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inc de
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ld a,[de]
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ld [$FF98],a
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jr .next3\@
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.next2\@
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ld [H_NUMTOPRINT + 2],a
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jr .checkNumDigits\@
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.twoBytes\@
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ld a,[de]
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ld [$FF97],a
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ld [H_NUMTOPRINT + 1],a
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inc de
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ld a,[de]
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ld [$FF98],a
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jr .next3\@
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.next\@
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ld [H_NUMTOPRINT + 2],a
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jr .checkNumDigits\@
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.oneByte\@
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ld a,[de]
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ld [$FF98],a
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.next3\@
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ld [H_NUMTOPRINT + 2],a
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.checkNumDigits\@
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push de
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ld d,b
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ld a,c
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ld b,a
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xor a
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ld c,a
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ld a,b
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cp 2
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jr z,.next4\@
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cp 3
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jr z,.next5\@
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cp 4
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jr z,.next6\@
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cp 5
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jr z,.next7\@
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cp 6
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jr z,.next8\@
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ld a,$F
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ld [$FF99],a
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ld a,$42
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ld [$FF9A],a
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ld a,$40
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ld [$FF9B],a
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call $3D25
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call $3D89
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.next8\@
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ld a,1
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ld [$FF99],a
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ld a,$86
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ld [$FF9A],a
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ld a,$A0
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ld [$FF9B],a
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call $3D25
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call $3D89
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.next7\@
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ld a,b ; a = number of decimal digits
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cp a,2
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jr z,.tensPlace\@
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cp a,3
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jr z,.hundredsPlace\@
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cp a,4
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jr z,.thousandsPlace\@
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cp a,5
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jr z,.tenThousandsPlace\@
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cp a,6
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jr z,.hundredThousandsPlace\@
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.millionsPlace\@
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ld a,1000000 >> 16
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ld [H_POWEROFTEN],a
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ld a,(1000000 >> 8) & $FF
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ld [H_POWEROFTEN + 1],a
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ld a,1000000 & $FF
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ld [H_POWEROFTEN + 2],a
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call PrintNumber_PrintDigit
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call PrintNumber_AdvancePointer
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.hundredThousandsPlace\@
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ld a,100000 >> 16
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ld [H_POWEROFTEN],a
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ld a,(100000 >> 8) & $FF
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ld [H_POWEROFTEN + 1],a
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ld a,100000 & $FF
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ld [H_POWEROFTEN + 2],a
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call PrintNumber_PrintDigit
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call PrintNumber_AdvancePointer
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.tenThousandsPlace\@
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xor a
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ld [$FF99],a
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ld a,$27
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ld [$FF9A],a
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ld a,$10
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ld [$FF9B],a
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call $3D25
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call $3D89
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.next6\@
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ld [H_POWEROFTEN],a
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ld a,10000 >> 8
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ld [H_POWEROFTEN + 1],a
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ld a,10000 & $FF
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ld [H_POWEROFTEN + 2],a
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call PrintNumber_PrintDigit
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call PrintNumber_AdvancePointer
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.thousandsPlace\@
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xor a
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ld [$FF99],a
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ld a,3
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ld [$FF9A],a
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ld a,$E8
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ld [$FF9B],a
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call $3D25
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call $3D89
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.next5\@
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ld [H_POWEROFTEN],a
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ld a,1000 >> 8
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ld [H_POWEROFTEN + 1],a
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ld a,1000 & $FF
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ld [H_POWEROFTEN + 2],a
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call PrintNumber_PrintDigit
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call PrintNumber_AdvancePointer
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.hundredsPlace\@
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xor a
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ld [$FF99],a
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ld [H_POWEROFTEN],a
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xor a
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ld [$FF9A],a
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ld a,$64
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ld [$FF9B],a
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call $3D25
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call $3D89
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.next4\@
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ld c,0
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ld a,[$FF98]
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.next10\@
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cp $A
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jr c,.next9\@
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sub $A
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ld [H_POWEROFTEN + 1],a
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ld a,100
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ld [H_POWEROFTEN + 2],a
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call PrintNumber_PrintDigit
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call PrintNumber_AdvancePointer
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.tensPlace\@
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ld c,00
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ld a,[H_NUMTOPRINT + 2]
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.loop\@
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cp a,10
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jr c,.underflow\@
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sub a,10
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inc c
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jr .next10\@
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.next9\@
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jr .loop\@
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.underflow\@
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ld b,a
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ld a,[$FF95]
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ld a,[H_PASTLEADINGZEROES]
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or c
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ld [$FF95],a
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jr nz,.next11\@
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call $3D83
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jr .next12\@
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.next11\@
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ld a,$F6
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add a,c
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ld [H_PASTLEADINGZEROES],a
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jr nz,.pastLeadingZeroes\@
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call PrintNumber_PrintLeadingZero
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jr .advancePointer\@
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.pastLeadingZeroes\@
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ld a,"0"
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add c
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ld [hl],a
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.next12\@
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call $3D89
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ld a,$F6
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add a,b
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.advancePointer\@
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call PrintNumber_AdvancePointer
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.onesPlace\@
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ld a,"0"
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add b
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ld [hli],a
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pop de
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dec de
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pop bc
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ret
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INCBIN "baserom.gbc",$3D25,$3DAB - $3D25
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; prints a decimal digit
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; This works by repeatedely subtracting a power of ten until the number becomes negative.
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; The number of subtractions it took in order to make the number negative is the digit for the current number place.
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; The last value that the number had before becoming negative is kept as the new value of the number.
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; A more succinct description is that the number is divided by a power of ten
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; and the quotient becomes the digit while the remainder is stored as the new value of the number.
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PrintNumber_PrintDigit: ; 3D25
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ld c,0 ; counts number of loop iterations to determine the decimal digit
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.loop\@
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ld a,[H_POWEROFTEN]
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ld b,a
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ld a,[H_NUMTOPRINT]
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ld [H_SAVEDNUMTOPRINT],a
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cp b
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jr c,.underflow0\@
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sub b
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ld [H_NUMTOPRINT],a
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ld a,[H_POWEROFTEN + 1]
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ld b,a
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ld a,[H_NUMTOPRINT + 1]
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ld [H_SAVEDNUMTOPRINT + 1],a
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cp b
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jr nc,.noBorrowForByte1\@
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.byte1BorrowFromByte0\@
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ld a,[H_NUMTOPRINT]
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or a,0
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jr z,.underflow1\@
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dec a
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ld [H_NUMTOPRINT],a
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ld a,[H_NUMTOPRINT + 1]
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.noBorrowForByte1\@
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sub b
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ld [H_NUMTOPRINT + 1],a
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ld a,[H_POWEROFTEN + 2]
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ld b,a
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ld a,[H_NUMTOPRINT + 2]
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ld [H_SAVEDNUMTOPRINT + 2],a
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cp b
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jr nc,.noBorrowForByte2\@
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.byte2BorrowFromByte1\@
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ld a,[H_NUMTOPRINT + 1]
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and a
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jr nz,.finishByte2BorrowFromByte1\@
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.byte2BorrowFromByte0\@
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ld a,[H_NUMTOPRINT]
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and a
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jr z,.underflow2\@
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dec a
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ld [H_NUMTOPRINT],a
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xor a
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.finishByte2BorrowFromByte1\@
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dec a
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ld [H_NUMTOPRINT + 1],a
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ld a,[H_NUMTOPRINT + 2]
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.noBorrowForByte2\@
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sub b
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ld [H_NUMTOPRINT + 2],a
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inc c
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jr .loop\@
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.underflow2\@
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ld a,[H_SAVEDNUMTOPRINT + 1]
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ld [H_NUMTOPRINT + 1],a
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.underflow1\@
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ld a,[H_SAVEDNUMTOPRINT]
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ld [H_NUMTOPRINT],a
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.underflow0\@
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ld a,[H_PASTLEADINGZEROES]
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or c
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jr z,PrintNumber_PrintLeadingZero
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ld a,"0"
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add c
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ld [hl],a
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ld [H_PASTLEADINGZEROES],a
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ret
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; prints a leading zero unless they are turned off in the flags
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PrintNumber_PrintLeadingZero: ; 3D83
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bit 7,d ; print leading zeroes?
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ret z
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ld [hl],"0"
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ret
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; increments the pointer unless leading zeroes are not being printed,
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; the number is left-aligned, and no nonzero digits have been printed yet
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PrintNumber_AdvancePointer: ; 3D89
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bit 7,d ; print leading zeroes?
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jr nz,.incrementPointer\@
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bit 6,d ; left alignment or right alignment?
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jr z,.incrementPointer\@
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ld a,[H_PASTLEADINGZEROES]
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and a
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ret z
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.incrementPointer\@
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inc hl
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ret
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; calls a function from a table of function pointers
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; INPUT:
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; a = index within table
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; hl = address of function pointer table
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CallFunctionInTable: ; 3D97
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push hl
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push de
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push bc
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add a
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ld d,0
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ld e,a
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add hl,de
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ld a,[hli]
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ld h,[hl]
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ld l,a
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ld de,.returnAddress\@
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push de
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jp [hl]
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.returnAddress\@
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pop bc
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pop de
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pop hl
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ret
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IsInArray: ; 3DAB
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; searches an array at hl for the value in a.
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@ -36322,7 +36529,7 @@ ENDC
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ld hl,$C3A9
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ld de,$D11E
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ld bc,$8103
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call $3C5F
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call PrintNumber
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FuncCoord 5,2
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ld hl,Coord
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ld de,$CF4B
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|
|
@ -36334,7 +36541,7 @@ ENDC
|
|||
ld hl,$C420
|
||||
ld de,$CD4C
|
||||
ld bc,$8205
|
||||
jp $3C5F
|
||||
jp PrintNumber
|
||||
|
||||
FuncCoord 5,10
|
||||
ld hl,Coord
|
||||
|
|
@ -36347,7 +36554,7 @@ ENDC
|
|||
ld hl,$C471
|
||||
ld de,$D11E
|
||||
ld bc,$8103
|
||||
call $3C5F
|
||||
call PrintNumber
|
||||
FuncCoord 5,12
|
||||
ld hl,Coord
|
||||
ld de,$CD6D
|
||||
|
|
@ -36359,7 +36566,7 @@ ENDC
|
|||
ld hl,$C4E8
|
||||
ld de,$CD59
|
||||
ld bc,$8205
|
||||
jp $3C5F
|
||||
jp PrintNumber
|
||||
|
||||
OTString67E5: ; 67E5
|
||||
db "──",$74,$F2,$4E
|
||||
|
|
@ -46263,17 +46470,17 @@ GetPrizeMenuId: ; 14:678E
|
|||
ld c,(1 << 7 | 2)
|
||||
; Function $15CD displays BCD value (same routine
|
||||
; used by text-command $02)
|
||||
call $15CD ; Print_BCD
|
||||
call PrintBCDNumber ; Print_BCD
|
||||
ld de,$D143
|
||||
FuncCoord 13,7
|
||||
ld hl,Coord
|
||||
ld c,(%1 << 7 | 2)
|
||||
call $15CD
|
||||
call PrintBCDNumber
|
||||
ld de,$D145
|
||||
FuncCoord 13,9
|
||||
ld hl,Coord
|
||||
ld c,(1 << 7 | 2)
|
||||
jp $15CD
|
||||
jp PrintBCDNumber
|
||||
|
||||
PrizeDifferentMenuPtrs: ; 14:6843
|
||||
dw PrizeMenuMon1Entries
|
||||
|
|
@ -46364,7 +46571,7 @@ PrintPrizePrice: ; 14:687A
|
|||
ld hl,Coord
|
||||
ld de,W_PLAYERCOINS1
|
||||
ld c,%10000010
|
||||
call $15CD
|
||||
call PrintBCDNumber
|
||||
ret
|
||||
|
||||
.CoinText\@ ; 14:68A5
|
||||
|
|
|
|||
Loading…
Reference in a new issue