ZeusWPI/ass_messages
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Stub serial

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This commit is contained in:
Robbe Van Herck 2019-06-14 11:01:36 +02:00
parent 5ae2d81bc2
commit d63c2cbd69
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GPG key ID: 10AEB5879CBDE7C4
1 changed files with 31 additions and 5 deletions
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32
messages.asm
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@ -21,6 +21,9 @@ mov dh, HEIGHT
mov dl, WIDTH mov dl, WIDTH
int 0x10 int 0x10
;; Turn on interrupts
sti
;; Set cursor to bottom of screen ;; Set cursor to bottom of screen
mov dh, HEIGHT mov dh, HEIGHT
mov dl, 0x00 mov dl, 0x00
@ -28,10 +31,33 @@ mov bh, 0x00
mov ah, 0x02 mov ah, 0x02
int 0x10 int 0x10
;; Start serial connection
mov ah, 0
mov al, 0b11100011
mov dx, 0
int 0x14
.loop: .loop:
;; Read character ;; Print a '.' to debug
mov ah, 0x00 mov ah, 0x01
int 0x16 mov al, '.'
mov dx, 0
int 0x14
;; Check status of COM1
mov ah, 0x03
mov dx, 0
int 0x14
;; If not ok, wait
and ah, 0x01
jz .loop
;; If ok, start reading character
mov ah, 0x02
mov dx, 0
int 0x14
cmp al, 0x0d ; newline cmp al, 0x0d ; newline
je .newline je .newline