The full set is (untested, hopefully I got it right):

`;; enable 8-bit mode`

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld bc,&fd09

ld a,1

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a

;; disable cache

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld bc,&fd09

ld a,&82

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a

;; set pio

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld a,0 ;; may need to be 1

ld bc,&fd0a

out (c),a

ld bc,&fd09

ld a,&3

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a

;; disable power on reset of defaults at soft reset

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld bc,&fd09

ld a,&66

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a

;; disable advanced power management

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld bc,&fd09

ld a,&85

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a

;; disable extended power operations

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld bc,&fd09

ld a,&89

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a

;; disable power level 1 commands

ld a,&40 ;; lba

ld bc,&fd0e

out (c),a

ld bc,&fd09

ld a,&8a

out (c),a

ld a,&ef

ld bc,&fd0f

out (c),a