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; =============================================================================
; tty.asm - console output over the serial port (emulator debug channel).
; A real gbos would render to VRAM; serial is a zero-VRAM stub that shows up
; in emulator serial logs (bgb/SameBoy) and on link hardware.
; =============================================================================
INCLUDE "include/gbos.inc"
SECTION "tty", ROM0
; PutChar - A = character. Push to serial data and kick a transfer.
PutChar::
ld [rSB], a
ld a, $81 ; start transfer, internal clock
ld [rSC], a
ret
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