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ed: fix 'd' going crazy when deleting last lines of buf

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This commit is contained in:
Virgil Dupras 2019-07-21 19:43:45 -04:00
parent 0fd16a0bb6
commit 0237ff105f
1 changed files with 7 additions and 0 deletions
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7
apps/ed/buf.asm
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@ -111,6 +111,13 @@ bufDelLines:
pop de ; <-- lvl 2 pop de ; <-- lvl 2
pop hl ; <-- lvl 1 pop hl ; <-- lvl 1
; Line count updated! ; Line count updated!
; One other thing... is BC zero? Because if it is, then we shouldn't
; call ldir (otherwise we're on for a veeeery long loop), BC=0 means
; that only last lines were deleted. nothing to do.
ld a, b
or c
ret z ; BC==0, return
; let's have invert HL and DE to match LDIR's signature ; let's have invert HL and DE to match LDIR's signature
ex de, hl ex de, hl
; At this point we have higher index in HL, lower index in DE and number ; At this point we have higher index in HL, lower index in DE and number