Code block address: DB1D   Length: 11  M:1 X:0 called by: D9B4
00DB1D    240C0207      bbs     #0x02, dp + 0x0c, 0xdb28        ; Call target from D9B4, Read from Port 4
00DB21    3C9B110212    bbc     #0x02, 0x119b, 0xdb38 ; PreviousVSS2
00DB26    8005          bra     0xdb2d

Code block address: DB28   Length: 50  M:1 X:0 called by: DB1D
00DB28    2C9B11020B    bbs     #0x02, 0x119b, 0xdb38           ; Branch target from DB1D ; PreviousVSS2
00DB2D    EE4310        inc     0x1043                          ; Branch target from DB26        ; VSS2_Pulse_Count
00DB30    AD9B11        lda     al, 0x119b
00DB33    4902          eor     al, #0x02
00DB35    8D9B11        sta     al, 0x119b
00DB38    AE3210        ldx     0x1032                          ; Branch target from DB21, Branch target from DB28        ; VSS2_Time_Count
00DB3B    E8            inx     
00DB3C    E05901        cpx     #0x0159
00DB3F    900D          bcc     0xdb4e
00DB41    AD4310        lda     al, 0x1043        ; VSS2_Pulse_Count
00DB44    8D6211        sta     al, 0x1162 ; VSS2 Speed
00DB47    A20000        ldx     #0x0000
00DB4A    9C431000      ldm     #0x00, 0x1043        ; VSS2_Pulse_Count
00DB4E    8E3210        stx     0x1032                          ; Branch target from DB3F        ; VSS2_Time_Count
00DB51    3C27100804    bbc     #0x08, 0x1027, 0xdb5a           ;  Errorflags 2 ; VSS2 Error
00DB56    A905          lda     al, #0x05
00DB58    8003          bra     0xdb5d

Code block address: DB5A   Length: 7  M:1 X:0 called by: DB51
00DB5A    AD6211        lda     al, 0x1162                      ; Branch target from DB51 ; VSS2 Speed
00DB5D    8D4210        sta     al, 0x1042                      ; Branch target from DB58
00DB60    60            rts