Contents of the external EPROM:

000-07f: 80

080: 8e 80 40  lds  #$8040	;stack pointer to middle of 128 #$80s
083: 4f        clra 
084: 97 17     sta  $17		;port 6=0
086: 97 03     sta  $03		;port 2=0
088: 4a        deca 
089: 97 16     sta  $16		;DDR 6=ff (all out)
08b: c6 01     ldb  #$01
08d: d7 01     stb  $01		;DDR 2=01 (2.0 out)
08f: ce c0 00  ldx  #$C000	;start at $C000
092: a6 00     lda  (x+$00)	;get byte from ROM
094: 97 17     sta  $17		;output byte to port 6
096: d7 03     stb  $03		;set flag
098: 4f        clra 
099: 97 03     sta  $03		;clear flag
09b: 08        inx  		;next byte
09c: 26 f4     bne  $0092	;until wrap to $0000
09e: 7e 80 80  jmp  $8080	;then start over

0a1-0ff: 80