From 971dc1d719385fc6e4a53edf8f037139f3d1cdb1 Mon Sep 17 00:00:00 2001
From: Gale Faraday <k4mu1kazum4@gmail.com>
Date: Sat, 7 Dec 2024 10:30:15 -0600
Subject: [PATCH 1/2] feat: new serial functions

---
 code/boot/src/boot.s | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/code/boot/src/boot.s b/code/boot/src/boot.s
index 7f13307..c53a826 100644
--- a/code/boot/src/boot.s
+++ b/code/boot/src/boot.s
@@ -10,6 +10,7 @@
 ;;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
+  SECTION "Reset"
   ORG ROM_BASE
 
 RESET
@@ -36,12 +37,44 @@ WAIT
   nop
   bra WAIT
 
+  SECTION "Serial"
+
+; Writes a char to the UART in non FIFO mode, preserves A.
+; @param b: char to write
+OUTCHAR
+  pshs a               ; Preserve A
+1
+  lda UART_LSR         ; if LSR.THRE == 1 then write
+  anda UARTF_LSR_THRE
+  bne 1B               ; Loop if UART not ready yet
+  stb UART_BUFR        ; Write char
+  puls a               ; Restore A
+  rts
+
+; Writes a null terminated string to the UART in non FIFO mode, clobbers A and
+; B.
+; @param x: null terminated string start address.
+OUTSTR
+  ldb x                ; Get the next value from X
+  cmpb #$00            ; Make sure that mother is non-null
+  beq 2F
+  leax 1,x             ; Increment X for our next char
+1                      ; Loop point for UART waiting
+  lda UART_LSR         ; Wait for UART to be ready
+  anda UARTF_LSR_THRE
+  bne 1B
+  stb UART_BUFR        ; Actually do our write
+  bra OUTSTR           ; Reset for the next char
+2                      ; Jump point for End of routine
+  rts
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;
 ;; Interrupt and Reset Vectors
 ;;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
+  SECTION "Vectors"
   ORG VECS_BASE
 
 VECTORS

From 9edc2554127e45f7d7606a9cbea43502dca18e0a Mon Sep 17 00:00:00 2001
From: Gale Faraday <k4mu1kazum4@gmail.com>
Date: Wed, 11 Dec 2024 05:30:33 -0600
Subject: [PATCH 2/2] style: caps in comment fix

---
 code/boot/src/boot.s | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/boot/src/boot.s b/code/boot/src/boot.s
index c53a826..6c563b0 100644
--- a/code/boot/src/boot.s
+++ b/code/boot/src/boot.s
@@ -65,7 +65,7 @@ OUTSTR
   bne 1B
   stb UART_BUFR        ; Actually do our write
   bra OUTSTR           ; Reset for the next char
-2                      ; Jump point for End of routine
+2                      ; Jump point for end of routine
   rts
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;