From 64d57bdb3187efc4b6269011ac99cd5268e194be Mon Sep 17 00:00:00 2001
From: Daniele Verducci <daniele.verducci@ichibi.eu>
Date: Fri, 14 Feb 2025 10:47:45 +0100
Subject: [PATCH] Memory monitor: WIP LOAD command

---
 .../software/z80-assembly/os/monitor.asm           | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/pat80-computer/software/z80-assembly/os/monitor.asm b/pat80-computer/software/z80-assembly/os/monitor.asm
index 0f71766..2debb92 100644
--- a/pat80-computer/software/z80-assembly/os/monitor.asm
+++ b/pat80-computer/software/z80-assembly/os/monitor.asm
@@ -37,13 +37,13 @@ MON_COMMAND_SET: DB "SET",0
 MON_COMMAND_ZERO: DB "ZERO",0
 MON_COMMAND_LOAD: DB "LOAD",0
 MON_COMMAND_RUN: DB "RUN",0
-MON_COMMAND_ADB: DB "ADB",0
 MON_COMMAND_MEMTEST: DB "MEMTEST",0
 MON_COMMAND_QUIT: DB "QUIT",0
 MON_ARG_HEX: DB "    0x",0
-MON_HELP: DB 10,"Available commands:\nHELP prints this message\nDUMP [ADDR] shows memory content\nSET [ADDR] sets memory content\nZERO [ADDR] [ADDR] sets all bytes to 0 in the specified range\nLOAD\nRUN [ADDR] executes code starting from ADDR\nADB starts Assembly Deploy Bridge\nMEMTEST checks ram boundaries\nQUIT exits",0
+MON_HELP: DB 10,"Available commands:\nHELP prints this message\nDUMP [ADDR] shows memory content\nSET [ADDR] sets memory content\nZERO [ADDR] [ADDR] sets all bytes to 0 in the specified range\nLOAD [ADDR] loads a program or data from tape at ADDR\nRUN [ADDR] executes code starting from ADDR\nADB starts Assembly Deploy Bridge\nMEMTEST checks ram boundaries\nQUIT exits",0
 MON_MSG_ADB: DB 10,"Waiting for data.",0
 MON_ERR_SYNTAX: DB "    Syntax error",0
+MON_COMMAND_LOAD_PRESSPLAY: DB "Press play on tape",0
 ; MON_RAMTEST_INTRO: DB " Checking memory... ",0
 ; MON_RAMTEST_RAMSTART: DB " Ram starts at 0x",0
 MON_DUMP_BYTES_LINES: EQU 8
@@ -294,10 +294,18 @@ monitor_zero: ; TODO: bugged, doesn't exit cycle
 		ld (hl), 0 ; set byte to 0 in memory
 		ret
 
+
+; Asks user for a memory position, then wait for data from tape and place it
+; from the specified position on until it receives 4 consecutive 0x00 (EOF)
+; @uses b, c, h, l
 monitor_load:
     ld bc, MON_COMMAND_LOAD + 1 ; autocomplete command
     call Sys_Print
-	; TODO: When implemented, re-enable interrupts before run application
+	; Now read the memory address from the user
+    call monitor_arg_2byte  ; returns the read bytes in hl
+    ; Ask user to press play
+    ld bc, MON_COMMAND_LOAD_PRESSPLAY
+    ; TODO: wait for data
     jp monitor_main_loop
 
 monitor_run: