diff --git a/cores/Colecovision/SD_Card.zip b/cores/Colecovision/SD_Card.zip
new file mode 100644
index 0000000..f940338
Binary files /dev/null and b/cores/Colecovision/SD_Card.zip differ
diff --git a/software/esprst/main.asm b/software/esprst/main.asm
index 0e277c4..0c528f8 100644
--- a/software/esprst/main.asm
+++ b/software/esprst/main.asm
@@ -12,11 +12,15 @@ Start:
 
     ld hl, configuring : call putS
     ld hl, cmd_uart : call uartWriteStringZ
-    call wait : call wait
+    ld b, 255
+rdWt:
+    push bc : call uartRead : halt : pop bc : djnz rdWt
 
     ld hl, reseting : call putS
     ld hl, cmd_rst : call uartWriteStringZ
-    call wait : call wait
+wrlp:
+    call uartReadBlocking : call pushRing
+    ld hl, response_er : call searchRing : cp 1 : jr nz, wrlp
 
     ld hl, setting_m : call putS
     ld hl, cmd_cwmode : call uartWriteStringZ
@@ -80,6 +84,6 @@ cmd_cwmode  defb "AT+CWMODE=1", 13, 10, 0
 cmd_info    defb "AT+GMR", 13, 10, 0
 
 response_ok defb "OK", 13, 10, 0
-response_er defb "ready", 13, 10, 0
+response_er defb "ready", 0
 
     SAVEBIN "esprst", Start, $ - Start
\ No newline at end of file
diff --git a/software/esprst/uart.asm b/software/esprst/uart.asm
index c0820ed..d197d16 100644
--- a/software/esprst/uart.asm
+++ b/software/esprst/uart.asm
@@ -55,6 +55,7 @@ urb:
 ; BC will be wasted
 uartWriteByte:
     push af
+    rst #10
     ld bc, ZXUNO_ADDR
     ld a, UART_STAT_REG
     out (c), a
diff --git a/software/ugophy/uart.asm b/software/ugophy/uart.asm
index 7b4ccf2..0ca1d13 100644
--- a/software/ugophy/uart.asm
+++ b/software/ugophy/uart.asm
@@ -17,7 +17,6 @@ uartBegin:
 uartReadBlocking:
     call uartRead
     push af : ld a, 1 : cp b : jr z, urb : pop af
-    ret nz
     jp uartReadBlocking
 urb: 
     pop af