Initial Agat support

asminc/agat.inc

@@ -0,0 +1,38 @@
+
+;-----------------------------------------------------------------------------
+; Zero page stuff
+
+WNDLFT  :=      $20     ; Text window left
+WNDWDTH :=      $21     ; Text window width
+WNDTOP  :=      $22     ; Text window top
+WNDBTM  :=      $23     ; Text window bottom+1
+CH      :=      $24     ; Cursor horizontal position
+CV      :=      $25     ; Cursor vertical position
+BASL    :=      $28     ; Text base address low
+BASH    :=      $29     ; Text base address high
+CURSOR  :=      $2D     ; Cursor character
+TATTR   :=      $32     ; Text attributes
+PROMPT  :=      $33     ; Used by GETLN
+VCOUT   :=      $36     ; COUT Subroutine Vector
+VCIN    :=      $38     ; CIN Subroutine Vector
+RNDL    :=      $4E     ; Random counter low
+RNDH    :=      $4F     ; Random counter high
+HIMEM   :=      $73     ; Highest available memory address+1
+
+;-----------------------------------------------------------------------------
+; Vectors
+
+BRKVec  :=      $03F0   ; Break vector
+SOFTEV  :=      $03F2   ; Vector for warm start
+PWREDUP :=      $03F4   ; This must be = EOR #$A5 of SOFTEV+1
+
+;-----------------------------------------------------------------------------
+; Hardware
+
+; Keyboard input
+KBD     :=      $C000   ; Read keyboard
+KBDSTRB :=      $C010   ; Clear keyboard strobe
+
+; Game controller
+BUTN0   :=      $C061   ; Open-Apple Key
+BUTN1   :=      $C062   ; Closed-Apple Key