From d08dfd527da493bd318205deecbdb74cbc3c952f Mon Sep 17 00:00:00 2001
From: Ry <ryanst755@gmail.com>
Date: Sun, 1 May 2022 18:03:04 -0700
Subject: [PATCH] monitor: Add set.SZ command

---
 monitor/commands/commands.asm | 16 ++++++++
 monitor/commands/help.asm     |  1 +
 monitor/commands/set.asm      | 74 +++++++++++++++++++++++++++++++++++
 3 files changed, 91 insertions(+)
 create mode 100644 monitor/commands/set.asm

diff --git a/monitor/commands/commands.asm b/monitor/commands/commands.asm
index 63df7b9..f267e85 100644
--- a/monitor/commands/commands.asm
+++ b/monitor/commands/commands.asm
@@ -14,6 +14,21 @@ monitor_shell_parse_command:
     call compare_string
     ifz jmp monitor_shell_help_command
 
+    ; set.8
+    mov r1, monitor_shell_set8_command_string
+    call compare_string
+    ifz jmp monitor_shell_set8_command
+
+    ; set.16
+    mov r1, monitor_shell_set16_command_string
+    call compare_string
+    ifz jmp monitor_shell_set16_command
+
+    ; set.32
+    mov r1, monitor_shell_set32_command_string
+    call compare_string
+    ifz jmp monitor_shell_set32_command
+
     ; invalid command
     mov r0, monitor_shell_invalid_command_string
     call print_string_to_monitor
@@ -25,3 +40,4 @@ monitor_shell_invalid_command_string: data.str "invalid command" data.8 10 data.
     ; all commands
     #include "monitor/commands/exit.asm"
     #include "monitor/commands/help.asm"
+    #include "monitor/commands/set.asm"
diff --git a/monitor/commands/help.asm b/monitor/commands/help.asm
index 1c93d5a..3fb8597 100644
--- a/monitor/commands/help.asm
+++ b/monitor/commands/help.asm
@@ -12,4 +12,5 @@ monitor_shell_help_text:
     data.str "------- | -----------" data.8 10
     data.str "exit    | exit the monitor" data.8 10
     data.str "help    | display this help text" data.8 10
+    data.str "set.SZ  | set [$0] to $1; equivalent to `mov.SZ [$0], $1`" data.8 10
     data.8 0
diff --git a/monitor/commands/set.asm b/monitor/commands/set.asm
new file mode 100644
index 0000000..cbec782
--- /dev/null
+++ b/monitor/commands/set.asm
@@ -0,0 +1,74 @@
+; set command
+
+monitor_shell_set8_command_string:  data.str "set.8"  data.8 0
+monitor_shell_set16_command_string: data.str "set.16" data.8 0
+monitor_shell_set32_command_string: data.str "set.32" data.8 0
+
+monitor_shell_set8_command:
+    call monitor_shell_parse_arguments
+
+    ; r0: pointer to address string
+    ; r1: pointer to byte string
+
+    push r1
+    mov r1, 16
+    call string_to_int
+    mov r10, r0
+
+    pop r0
+    mov r1, 16
+    call string_to_int
+    mov r11, r0
+
+    ; r10: address
+    ; r11: byte
+
+    mov.8 [r10], r11
+
+    ret
+
+monitor_shell_set16_command:
+    call monitor_shell_parse_arguments
+
+    ; r0: pointer to address string
+    ; r1: pointer to half string
+
+    push r1
+    mov r1, 16
+    call string_to_int
+    mov r10, r0
+
+    pop r0
+    mov r1, 16
+    call string_to_int
+    mov r11, r0
+
+    ; r10: address
+    ; r11: half
+
+    mov.16 [r10], r11
+
+    ret
+
+monitor_shell_set32_command:
+    call monitor_shell_parse_arguments
+
+    ; r0: pointer to address string
+    ; r1: pointer to word string
+
+    push r1
+    mov r1, 16
+    call string_to_int
+    mov r10, r0
+
+    pop r0
+    mov r1, 16
+    call string_to_int
+    mov r11, r0
+
+    ; r10: address
+    ; r11: word
+
+    mov [r10], r11
+
+    ret