diff --git a/src/config.c b/src/config.c
index c3556ac..9cca87f 100644
--- a/src/config.c
+++ b/src/config.c
@@ -28,8 +28,8 @@ const struct config config = {
 	.pwm_max = 0xffff,
 #endif
 #ifdef HAVE_FPGA
-	.fpga_config_page = 8,
-	.fpga_config_count = 504,
+	.fpga_config_page = 1,
+	.fpga_config_count = 511,
 #endif
 };
 
diff --git a/src/dose.py b/src/dose.py
index 74a830d..ca3b2e1 100755
--- a/src/dose.py
+++ b/src/dose.py
@@ -220,7 +220,7 @@ class dose_cmd(uart.uart):
             r.append((dc, self.adc()))
         return r
 
-    def flash(self, op=None, resp=False, poll=False, **aa):
+    def flash(self, op=None, resp=True, poll=False, **aa):
         c = "F"
         if poll:
             c = "F@"
@@ -254,7 +254,6 @@ class dose_cmd(uart.uart):
                 self.wait_for_spi()
 
     def wait_for_spi(self):
-        return
         while True:
             r = self.cmd("F")[1]
             if not r:
@@ -299,7 +298,10 @@ class dose_cmd(uart.uart):
     def flash_status(self, blocking=False):
         r = (0,0,bytes(2))
         while not r[2][0] & 0x80:
-            r = self.flash("Status", resp=True, what="cmdbuf")
+            self.flash("Status", what="cmdbuf")
+            r = self.cmd("F<")
+            while r[1]:
+                r = self.cmd("F<")
             if not blocking:
                 break
         return tuple(r[2][:2])
@@ -310,10 +312,10 @@ class dose_cmd(uart.uart):
         self.flash("Program2", page=page)
         self.flash_status(True)
 
-    def write_file2flash(self, page, fn, pages):
+    def write_file2flash(self, page, fn):
         n = 0
         with open(fn, "rb") as f:
-            while not pages or n < pages:
+            while True:
                 b =f.read(512)
                 if not b:
                     break
@@ -342,7 +344,7 @@ class dose_cmd(uart.uart):
         self.flash(op)
 
     def flash_Id(self):
-        r = self.flash("Id", resp=True, what="cmdbuf")
+        r = self.flash("Id", what="cmdbuf")
         i = r[2][:5]
         print(f"FLASH chip {b2hex(i)}", file=sys.stderr)
         return i
@@ -373,7 +375,7 @@ class dose_cmd(uart.uart):
 
     FPGA_FLGS = {
         "ABORT":     0x01,
-        "DEAD":      0x10,
+        "ABORTED":   0x10,
         "BUSY":      0x20,
         "SUBMITTED": 0x40,
         "CONFIG":    0x80,
diff --git a/src/fpga.c b/src/fpga.c
index 9300742..8b7a770 100644
--- a/src/fpga.c
+++ b/src/fpga.c
@@ -38,15 +38,21 @@ void fpga_cmd(struct fpga_cmd *c)
 	uint8_t n = c->n;
 	uint8_t z = c->z;
 	if (fpga_status() != as_configured) {
-		n |= fpga_dead;
-		if (~n & fpga_configure) {
-			c->n = n;
-			return;
-		}
+		c->n = n | fpga_dead;
+		return;
 	}
-	c->n = n & ~fpga_busy | fpga_submitted;
+	if (n & fpga_abort && spi_abort()) {
+		c->n = n | fpga_aborted;
+		return;
+	}
+	else if (spi_busy_p()) {
+		c->n = n | fpga_busy;
+		return;
+	}
+	c->n = n & ~fpga_busy;
 	if (n & fpga_submitted)
 		return;
+	c->n = n | fpga_submitted;
 
 	spi_select(n & fpga_configure ? SPI_CONFIG : 0);
 	spi.csize = n &= fpga_size;
@@ -56,8 +62,7 @@ void fpga_cmd(struct fpga_cmd *c)
 	if (z & fpga_wait_nonzero) {
 		spi.isize = n + (z>>3 & fpga_size); // ignore cmd ± (z[6:4])
 		spi.zsize = spi.rsize = z & fpga_size; // read x[3:1] words
-		// start reading at the first byte with MSB set after cmd
-		spi.mask = spi.wait = 0x80;
+		spi.mask = 0xff; // start reading at the first nonzero byte after cmd
 	}
 	else {
 		spi.zsize = z &= 0x7e; // send z zeros/nop after cmd
diff --git a/src/fpga.h b/src/fpga.h
index 0e24b32..7576d36 100644
--- a/src/fpga.h
+++ b/src/fpga.h
@@ -8,11 +8,13 @@ struct fpga_cmd {
 };
 
 enum fpga_flags {
+	fpga_abort     = 0x01,
 	fpga_size      = 0x0e,
-	fpga_dead      = 0x10,
+	fpga_aborted   = 0x10,
 	fpga_busy      = 0x20,
 	fpga_submitted = 0x40,
 	fpga_configure = 0x80,
+	fpga_dead      = 0x80,
 
 	fpga_wait_nonzero = 0x01,
 };