Difference between revisions of "Z80 Routines:Other:DispHL"
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| − | [[Category:Z80 Routines: | + | [[Category:Z80 Routines:Display|DispHL]] |
[[Category:Z80 Routines:Other|DispHL]] | [[Category:Z80 Routines:Other|DispHL]] | ||
[[Category:Z80 Routines|DispHL]] | [[Category:Z80 Routines|DispHL]] | ||
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<nowiki>;DispHL for games | <nowiki>;DispHL for games | ||
| − | ;input: hl=num, d=row,e=col, | + | ;input: hl=num, d=row,e=col, c=number of algarisms to skip |
;number of numbers' characters to display: 5 ; example: 65000 | ;number of numbers' characters to display: 5 ; example: 65000 | ||
| − | ;output: hl displayed | + | ;output: hl displayed, with algarisms skiped and spaces for initial zeros |
| − | + | DispHL_games: | |
| − | + | inc c | |
| + | ld b,1 ;skip 0 flag | ||
ld (CurRow),de | ld (CurRow),de | ||
| − | + | ;Number in hl to decimal ASCII | |
| − | + | ;Thanks to z80 Bits | |
| − | + | ;inputs: hl = number to ASCII | |
| − | + | ;example: hl=300 outputs ' 300' | |
| − | + | ;destroys: af, hl, de used | |
| − | + | ld de,-10000 | |
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| − | ld | + | |
call Num1 | call Num1 | ||
| − | ld | + | ld de,-1000 |
call Num1 | call Num1 | ||
| − | ld | + | ld de,-100 |
call Num1 | call Num1 | ||
| − | ld | + | ld e,-10 |
call Num1 | call Num1 | ||
| − | ld | + | ld e,-1 |
| − | Num1: ld a,'0'-1 | + | Num1: |
| + | ld a,'0'-1 | ||
Num2: inc a | Num2: inc a | ||
| − | add hl, | + | add hl,de |
jr c,Num2 | jr c,Num2 | ||
| − | sbc hl, | + | sbc hl,de |
| − | ld ( | + | dec c ;c is skipping |
| − | + | jr nz,skipnum | |
| − | ret </nowiki | + | inc c |
| − | + | djnz notcharnumzero | |
| − | + | cp '0' | |
| + | jr nz,notcharnumzero | ||
| + | leadingzero: | ||
| + | inc b | ||
| + | skipnum: | ||
| + | ld a,' ' | ||
| + | notcharnumzero: | ||
| + | push bc | ||
| + | call PUTCHAR ;bcall(_PutC) works, not sure if it preserves bc | ||
| + | pop bc | ||
| + | ret</nowiki> | ||
== Hexadecimal Version == | == Hexadecimal Version == | ||
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<nowiki>;DispHL signed | <nowiki>;DispHL signed | ||
; | ; | ||
| − | + | DispHLdecsigned: | |
| − | + | ||
| + | ret</nowiki> | ||
Latest revision as of 05:56, 21 April 2010
Simple and small routines that print the value of z80 register pair hl.
Decimal Unsigned Versions
- First a simple and small to show. Mostly for debugging or simple programs.
;Number in hl to decimal ASCII ;Thanks to z80 Bits ;inputs: hl = number to ASCII ;example: hl=300 outputs '00300' ;destroys: af, bc, hl, de used DispHL: ld bc,-10000 call Num1 ld bc,-1000 call Num1 ld bc,-100 call Num1 ld c,-10 call Num1 ld c,-1 Num1: ld a,'0'-1 Num2: inc a add hl,bc jr c,Num2 sbc hl,bc call PUTCHAR ret
;Bonus! DispA routine ;adaptable for a DispA routine or any other 8-bit register DispA: ld h,0 ld l,a jp DispHL
- DispHL especially adapted to games (nifty to RPG)
;DispHL for games ;input: hl=num, d=row,e=col, c=number of algarisms to skip ;number of numbers' characters to display: 5 ; example: 65000 ;output: hl displayed, with algarisms skiped and spaces for initial zeros DispHL_games: inc c ld b,1 ;skip 0 flag ld (CurRow),de ;Number in hl to decimal ASCII ;Thanks to z80 Bits ;inputs: hl = number to ASCII ;example: hl=300 outputs ' 300' ;destroys: af, hl, de used ld de,-10000 call Num1 ld de,-1000 call Num1 ld de,-100 call Num1 ld e,-10 call Num1 ld e,-1 Num1: ld a,'0'-1 Num2: inc a add hl,de jr c,Num2 sbc hl,de dec c ;c is skipping jr nz,skipnum inc c djnz notcharnumzero cp '0' jr nz,notcharnumzero leadingzero: inc b skipnum: ld a,' ' notcharnumzero: push bc call PUTCHAR ;bcall(_PutC) works, not sure if it preserves bc pop bc ret
Hexadecimal Version
;Display a 16- or 8-bit number in hex. DispHLhex: ; Input: HL ld c,h call OutHex8 ld c,l OutHex8: ; Input: C ld a,c rra rra rra rra call Conv ld a,c Conv: and $0F add a,$90 daa adc a,$40 daa call PUTCHAR ;replace by bcall(_PutC) or similar ret
Decimal Signed Version
;DispHL signed ; DispHLdecsigned: ret
