gfaraday/chibi-pc09
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style: prettier math (thx asm6809), add MIT license to boot.s, remove stray (

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Amber
2024-11-22 10:17:26 -05:00
parent 3e4e0487a3
commit 4a50a80e1f
1 changed files with 13 additions and 12 deletions
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5
code/boot/src/boot.s
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@@ -1,5 +1,6 @@
; CHIBI PC-09 Prototype #1 Boot ROM
; (Copyright (c) 2024 Amber Zeller
; Copyright (c) 2024 Amber Zeller
; Licensed under MIT
; UART registers
UART EQU $7F00
@@ -7,7 +8,7 @@ UART EQU $7F00
; When DLAB = 0:
BUFR EQU UART ; TX/RX Buffer (Read for RX, Write for TX)
IER EQU UART + 1 ; Interrupt Enable Register
IIR EQU UART+1 ; Interrupt Enable Register (Upon Read)
IIR EQU UART + 1 ; Interrupt Ident Register (Upon Read)
; When DLAB = 1
DLL EQU UART ; Divisor Latch (LSB)
DLM EQU UART + 1 ; Divisor Latch (MSB)