Disassembly of iBEX 7202 boot sector

      318000  LD    SP,0080
      2100D8  LD    HL,D800
      1626    LD    D,26              ; 26H=38D=O/S TRACK?
      1E00    LD    E,00
      0E00    LD    C,00
      0643    LD    B,43
      3E09    LD    A,09
      32C700  LD    (00C7),A
      3E03    LD    A,03
      CDB700  CALL  00B7
      3AC700  LD    A,(00C7)
      3D      DEC   A
      32C700  LD    (OOC7),A
      CA00EE  JP    Z,EE00
      C5      PUSH  BC
      010004  LD    BC,0400
      09      ADD   HL,BC
      C1      POP   BC
      7B      LD    A,E
      3C      INC   A
      E607    AND   07
      5F      LD    E,A
      C29300  JP    NZ,0093
      79      LD    A,C
      F604    OR    04
      4F      LD    C,A
      C39300  JP    0093
      F5      PUSH  AF
      3E01    LD    A,01
      D381    OUT   81,A
      F1      POP   AF
      C018C0  CALL  C018
      F5      PUSH  AF
      3E00    LD    A,00
      D381    OUT   81,A
      F1      POP   AF
      C9      RET
      00      NOP
      D8      RET   C
      80      ADD   A,B
      04      INC   B
      1801    JR    01
      0180E4  LD    BC,E480
      00      NOP
      00