; ADF File for the M-Series BBC IO Adaptor
; CDM 18/7/90
; ref Doc No- ENG/483/1006/2
; File Name- @6A7F.ADF
; Issue 0B

; Adaptor Definition Block

AdapterId	6A7Fh

AdapterName	"M-Series BBC I/O Adaptor"

NumBytes	4
; NumBytes defines the number of POS registers used by the card

; Set Fixed POS register contents

FixedResources	POS[3]= xx111111b

; Set Base Address of Card

NamedItem
Prompt	"Adaptor I/O Location"

Choice " 0480-04BFh"   POS[2]=00000100b POS[1]=10000011b   IO 0480-04BFh 
Choice " 0500-053Fh"   POS[2]=00000101b POS[1]=00000011b   IO 0500-053Fh
Choice " 0580-05BFh"   POS[2]=00000101b POS[1]=10000011b   IO 0580-05BFh
Choice " 0600-063Fh"   POS[2]=00000110b POS[1]=00000011b   IO 0600-06FFh
Choice " 1000-103Fh"   POS[2]=00010000b POS[1]=00000011b   IO 1000-103Fh
Choice " 8000-803Fh"   POS[2]=10000000b POS[1]=00000011b   IO 8000-803Fh
Choice " F000-F03Fh"   POS[2]=11110000b POS[1]=00000011b   IO F000-F03Fh

Help

"The I/O range 0480-04BFh should normally be selected for compatability
with PC-186 applications.
If another BBC I/O card or any other adaptor is using these locations,
an alternative can be selected. Anyone attempting to access the adaptor 
registers directly should adapt their code accordingly."

; Set the Card Interrupt Level

NamedItem
Prompt	"System Interrupt Level"

Choice " Interrupt 15"   POS[0]=1111111xb   Int 15
Choice " Interrupt 3"    POS[0]=1111011xb   Int 3
Choice " Interrupt 4"    POS[0]=1111100xb   Int 4
Choice " Interrupt 10"   POS[0]=1111101xb   Int 10
Choice " Interrupt 11"   POS[0]=1111110xb   Int 11

Help
"Select the interrupt level for the adaptor to use.
For normal use select Interrupt 15."

; Option for Disabling card without removing

NamedItem
Prompt	"Enable/Disable Adaptor"

Choice " Adaptor Enabled"    POS[0]=xxxxxxx1b
Choice " Adaptor Disabled"   POS[0]=xxxxxxx0b

Help
"The adaptor must be enabled for normal operation.
Using the 'disabled' option functionally removes the adaptor from the PC
while not requiring that it be physically removed.
A card cannot be enabled if it requires a resource already selected by a
adaptor with a higher priority (one placed in a slot with a lower number)."