From 7cc69c5e7ce6c6b2cc587b21478e2281e32add89 Mon Sep 17 00:00:00 2001
From: Matthieu Bucchianeri <mbucchia@gmail.com>
Date: Sat, 8 Feb 2025 00:42:33 -0800
Subject: [PATCH] Reduce wait from SD Card.

---
 XTMax/Code/XTMax/bootrom.h        | 10 +++++-----
 XTMax/Drivers/BootROM/bootrom.asm | 18 +++++++++---------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/XTMax/Code/XTMax/bootrom.h b/XTMax/Code/XTMax/bootrom.h
index aba33ea..3e16db2 100644
--- a/XTMax/Code/XTMax/bootrom.h
+++ b/XTMax/Code/XTMax/bootrom.h
@@ -31,7 +31,7 @@ unsigned char BOOTROM[] = {
     1, 240, 137, 222, 131, 211, 0, 232, 179, 1, 91, 88, 115, 3, 233, 113,
     1, 83, 81, 82, 87, 80, 137, 193, 48, 237, 137, 223, 186, 130, 2, 176,
     0, 238, 81, 137, 232, 137, 243, 177, 81, 232, 115, 2, 114, 64, 186, 128,
-    2, 185, 232, 3, 235, 3, 232, 137, 2, 236, 60, 254, 224, 248, 117, 46,
+    2, 185, 80, 195, 235, 3, 232, 137, 2, 236, 60, 254, 224, 248, 117, 46,
     185, 0, 1, 82, 186, 131, 2, 236, 90, 132, 192, 252, 116, 4, 243, 109,
     235, 4, 237, 171, 226, 252, 237, 131, 197, 1, 131, 214, 0, 89, 226, 194,
     186, 130, 2, 176, 1, 238, 88, 95, 90, 89, 91, 233, 24, 1, 186, 130,
@@ -42,8 +42,8 @@ unsigned char BOOTROM[] = {
     142, 216, 186, 130, 2, 176, 0, 238, 81, 137, 232, 137, 243, 177, 88, 232,
     221, 1, 114, 89, 186, 128, 2, 176, 254, 238, 185, 0, 1, 135, 247, 82,
     186, 131, 2, 236, 90, 132, 192, 252, 116, 4, 243, 111, 235, 4, 173, 239,
-    226, 252, 135, 254, 185, 196, 9, 235, 3, 232, 214, 1, 236, 60, 255, 225,
-    248, 36, 31, 60, 5, 117, 38, 185, 196, 9, 235, 3, 232, 195, 1, 236,
+    226, 252, 135, 254, 185, 80, 195, 235, 3, 232, 214, 1, 236, 60, 255, 225,
+    248, 36, 31, 60, 5, 117, 38, 185, 80, 195, 235, 3, 232, 195, 1, 236,
     132, 192, 225, 248, 116, 23, 131, 197, 1, 131, 214, 0, 89, 226, 169, 186,
     130, 2, 176, 1, 238, 88, 95, 90, 89, 91, 31, 235, 105, 186, 130, 2,
     176, 1, 238, 89, 88, 40, 200, 95, 90, 89, 91, 31, 235, 76, 132, 192,
@@ -72,7 +72,7 @@ unsigned char BOOTROM[] = {
     1, 170, 135, 119, 0, 0, 0, 0, 1, 105, 64, 0, 0, 0, 1, 186,
     128, 2, 80, 176, 255, 238, 136, 200, 136, 252, 239, 88, 134, 216, 239, 134,
     216, 180, 1, 239, 185, 8, 0, 236, 60, 255, 225, 251, 132, 192, 116, 1,
-    249, 195, 81, 82, 49, 201, 186, 100, 0, 180, 134, 205, 21, 90, 89, 195,
+    249, 195, 81, 82, 49, 201, 186, 1, 0, 180, 134, 205, 21, 90, 89, 195,
     156, 30, 83, 86, 137, 198, 184, 0, 192, 142, 216, 180, 14, 49, 219, 252,
     172, 8, 192, 116, 4, 205, 16, 235, 247, 94, 91, 31, 157, 195, 156, 30,
     83, 81, 82, 86, 137, 194, 184, 0, 192, 142, 216, 49, 219, 252, 137, 214,
@@ -127,4 +127,4 @@ unsigned char BOOTROM[] = {
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 143};
\ No newline at end of file
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62};
\ No newline at end of file
diff --git a/XTMax/Drivers/BootROM/bootrom.asm b/XTMax/Drivers/BootROM/bootrom.asm
index 953ec1c..ed56a75 100644
--- a/XTMax/Drivers/BootROM/bootrom.asm
+++ b/XTMax/Drivers/BootROM/bootrom.asm
@@ -527,10 +527,10 @@ func_02_read_sector:
     call print_string
 %endif
     mov dx, 0x280           ; data port
-    mov cx, 1000            ; timeout
+    mov cx, 50000           ; timeout (50ms)
     jmp .receive_token_no_delay
 .receive_token:
-    call delay_100us
+    call delay_us
 .receive_token_no_delay:
     in al, dx
     cmp al, 0xfe
@@ -678,10 +678,10 @@ cpu 8086
     mov ax, wait_msg
     call print_string
 %endif
-    mov cx, 2500            ; timeout
+    mov cx, 50000           ; timeout (50ms)
     jmp .receive_status_no_delay
 .receive_status:
-    call delay_100us
+    call delay_us
 .receive_status_no_delay:
     in al, dx
     cmp al, 0xff
@@ -705,10 +705,10 @@ cpu 8086
     mov ax, wait_msg
     call print_string
 %endif
-    mov cx, 2500            ; timeout
+    mov cx, 50000           ; timeout (50ms)
     jmp .receive_finish_no_delay
 .receive_finish:
-    call delay_100us
+    call delay_us
 .receive_finish_no_delay:
     in al, dx
     test al, al
@@ -1225,14 +1225,14 @@ send_sd_read_write_cmd:
 ;
 
 ;
-; Wait 100 microseconds.
+; Wait 1 microseconds.
 ; out: AX = <TRASH>
 ;      FL = <TRASH>
-delay_100us:
+delay_us:
     push cx
     push dx
     xor cx, cx
-    mov dx, 100             ; microseconds
+    mov dx, 1               ; microseconds
     mov ah, 0x86            ; wait
     int 0x15
     pop dx