Code block address: D47F   Length: 33  M:1 X:0 called by: CC52
00D47F    AE6210        ldx     0x1062                          ; Call target from CC52 ; RPM_div12
00D482    2C5A10041E    bbs     #0x04, 0x105a, 0xd4a5
00D487    2C99110114    bbs     #0x01, 0x1199, 0xd4a0
00D48C    EC0080        cpx     0x8000
00D48F    9018          bcc     0xd4a9
00D491    0C991101      seb     #0x01, 0x1199
00D495    64F807        ldm     #0x07, dp + 0xf8                ; Write to Timer B3 interrupt control register
00D498    64F707        ldm     #0x07, dp + 0xf7                ; Write to Timer B4 interrupt control register
00D49B    14673F        clb     #0x3f, dp + 0x67                ; Write to Timer A interrupt status
00D49E    800F          bra     0xd4af

Code block address: D4A0   Length: 16  M:1 X:0 called by: D487
00D4A0    EC0280        cpx     0x8002                          ; Branch target from D487
00D4A3    B00A          bcs     0xd4af
00D4A5    1C991101      clb     #0x01, 0x1199                   ; Branch target from D482
00D4A9    64F800        ldm     #0x00, dp + 0xf8                ; Branch target from D48F, Write to Timer B3 interrupt control register
00D4AC    64F700        ldm     #0x00, dp + 0xf7                ; Write to Timer B4 interrupt control register
00D4AF    60            rts                                     ; Branch target from D49E, Branch target from D4A3