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https://github.com/hsoft/collapseos.git
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47 lines
706 B
NASM
47 lines
706 B
NASM
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; Format the number in DE into the string at (HL) in a decimal form.
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; Null-terminated. DE is considered an unsigned number.
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fmtDecimal:
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push ix
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push hl
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push de
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push af
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push hl \ pop ix
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ex de, hl ; orig number now in HL
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ld e, 0
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.loop1:
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call .div10
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push hl ; push remainder. --> lvl E
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inc e
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ld a, b ; result 0?
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or c
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push bc \ pop hl
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jr nz, .loop1 ; not zero, continue
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; We now have C digits to print in the stack.
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; Spit them!
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push ix \ pop hl ; restore orig HL.
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ld b, e
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.loop2:
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pop de ; <-- lvl E
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ld a, '0'
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add a, e
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ld (hl), a
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inc hl
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djnz .loop2
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; null terminate
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xor a
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ld (hl), a
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pop af
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pop de
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pop hl
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pop ix
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ret
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.div10:
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push de
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ld de, 0x000a
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call divide
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pop de
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ret
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