;; Dissassembly of fwreset.com on side 4 (CPM2.2) of 6128 system discs
;;
;; FWReset is used by Dr.Logo

;; check for CPM2.2
0100 0e0c      ld      c,0ch		;; S_BDOSVER
0102 cd0500    call    0005h		;; BDOS 
0105 7d        ld      a,l
0106 fe22      cp      22h
0108 ca1801    jp      z,0118h

;; if not cpm 2.2 print error message
010b 113401    ld      de,0134h
010e 0e09      ld      c,09h		;; A_WRITESTR
0110 cd0500    call    0005h		;; BDOS 
0113 0e00      ld      c,00h		;; P_TERMCPM
0115 cd0500    call    0005h		;; BDOS 

;; cpm 2.2
0118 cd9bbe    call    0be9bh ;; ENTER FIRMWARE
defw &bbff					;; SCR INITIALISE					
011d cd9bbe    call    0be9bh ;; ENTER FIRMWARE
defw &bb00						;; KM INITIALISE
0122 cd9bbe    call    0be9bh ;; ENTER FIRMWARE
defw &bb4e						;; TXT INITIALISE
0127 cd9bbe    call    0be9bh ;; ENTER FIRMWARE
defw &bbba						;; GRA INITIALISE

;; set mode to 2
012c 3e02      ld      a,02h
012e cd9bbe    call    0be9bh ;; ENTER FIRMWARE
defw &bc0e					;; SCR SET MODE
0133 c9        ret     

0134 
defb "ERROR: Requires CP/M 2.2",10,13,$