; Mass Memory Control Block (MMCB)
; (used by Buffer Switch ISR)
;   **should stay consistent with "mmcb.i" ***

immcb_status   ds 1  ; MMCB status
immcb_dtype    ds 1  ; Input Data type:
immcb_mode     ds 1  ; science mode
               ds 1  ; spare
immcb_OI       ds 4  ; MM word-address for data readout.
immcb_OI_n     ds 4  ; number of MM words allocated
immcb_owords   ds 4  ; number of compressed MM words written
immcb_ockw     ds 4  ; word-wise XOR checksum of compressed output
immcb_te       ds 6  ; Time of trigger event

immcb_t2       ds 6  ; time of second post-trigger exposure

immcb_eq       ds 2  ; event queue pointer

immcb_link     ds 3  ; bank(1), addr(2) of next MMCB in chain
  ; bank=FF means "null" link

immcb_fo       ds 1  ; 0=1st (triggered) readout, 1=follow-on

               ds 2  ; spares

; to the DCM, the 20-byte region between here and mmcb_te
; looks like a 5-word "spare"


immcb_ckw      ds 4  ; XOR of previous 10 words
                    ; (high byte of word stored first)