4 ld c, $51 ; Note that we are alive.
11 ld a, $04 ;start timer, 4.096KHz
34 db $0D,$0A,$1B,"[1mFPGABoy Diagnostic ROM",$1B,"[0m",$0D,$0A,0
36 section "fuq",HOME[$100]
44 ld c, $0F ; ack the irq
63 ; Memory tester: writes h ^ l to all addresses from C000 to DF80.
68 ld hl, $C001 ; Write loop
80 ld hl, $C001 ; Read loop
96 ld hl, testokstr ; Say we're OK
99 .memfail: ; Say we failed (sadface)
100 ; decrement hl the easy way
116 db "Testing memory from $C000 to $DF80...",0
120 db " Test failed at $",0
122 puthex: ; Put two hex nibbles to the serial console.
137 ; Wait for switches to be flipped on and off again.
157 db "Diagnostic ROM complete; flip switches to nonzero and then to zero to reset. Expect A.",$0D,$0A,0
159 ; Core instruction basic acceptance tests.
240 db "Testing instructions... ",0
258 db " test failed.",$0D,$0A,0
262 ; Serial port manipulation functions.