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recipes/sms: show all letters in font when Start is pressed
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@ -56,9 +56,6 @@ main:
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ld a, 0x81
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out (0xbf), a
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ld b, 0x41
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jr updateLetter
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mainloop:
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; What we do here is simple. We go though all bits of port A controller
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; increasing B each time. As soon as we get a hit, we display that
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@ -97,13 +94,12 @@ mainloop:
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out (0x3f), a
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inc b ; g
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in a, (0xdc)
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and 0b00100000 ; Port A Start pressed
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and 0b00010000 ; Port A Button A pressed
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jr z, updateLetter
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inc b ; h
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in a, (0xdc)
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and 0b00010000 ; Port A Button A pressed
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jr z, updateLetter
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inc b ; i
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and 0b00100000 ; Port A Start pressed
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jr z, allLetters ; when start is pressed, print all letters
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; no button pressed on port A, continue to updateLetter
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; Prints letter in B
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@ -115,9 +111,25 @@ updateLetter:
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ld a, b
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out (0xbe), a
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jr mainloop
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jp mainloop
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; print all letters (reverse order)
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allLetters:
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xor a
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out (0xbf), a
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ld a, 0x78
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out (0xbf), a
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ld b, 0x5e
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.loop:
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ld a, b
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out (0xbe), a
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xor a
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out (0xbe), a
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djnz .loop
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jp mainloop
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PaletteData:
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.db 0x00,0x3f
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PaletteDataEnd:
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