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Bugfix for nano-z80 #84

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Bugfix for nano-z80 #84

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f90b32e
Actually check the tty busy flag
venomix666 Oct 12, 2025
8218fb2
TTY busy fixed in hardware, updated BIOS to match
venomix666 Oct 17, 2025
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10 changes: 3 additions & 7 deletions arch/nano-z80/tty.z80
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Original file line number Diff line number Diff line change
Expand Up @@ -84,18 +84,14 @@ tty_clear_to_eos:
out (VID_CLEAR_TO_EOS), a
ret ;jp tty_update_cursor

; Add a timeout as just checking the busy flag gets stuck sometimes
; for unknows reasons
video_init:
ld a, IO_SELECT_VID
out (IO_BANK), a
ld b,37
video_init_delay:
video_init_wait:
in a, (VID_BUSY)
ret z
djnz video_init_delay
or a
jr nz, video_init_wait
ret


; vim: ts=4 sw=4 et ft=asm