fragment file (m1u8=m2u8_div_c1u8.asm) for 8-bit division (var / constant):
lda {m2}
ldx #{c1}
jsr _div8_8u._main_
sta {m1}

which calls:
function _div8_8u : Byte; assembler; volatile;
// input:  dividend in A, divisor in X
// output: result in A, if divisor = 0, result = 0
//
var
  dividend, divisor : Byte;
asm
  cpx #0
  bne !+
  // return 0 as result if divisor = 0
  lda #0
  rts
  !:
  sta dividend
  stx divisor
// 8bit/8bit division
// by White Flame
// https://codebase64.org/doku.php?id=base:8bit_divide_8bit_product
//
// Input: dividend, divisor
// Output: dividend = quotient, .A = remainder

 lda #$00
 ldx #$07
 clc
!:
  rol dividend
  rol
  cmp divisor
  bcc !+
  sbc divisor
!:
 dex
 bpl !--
 rol dividend

 lda dividend
end;