diff --git a/.build/loader.bin b/.build/loader.bin
deleted file mode 100644
index ddb9904..0000000
Binary files a/.build/loader.bin and /dev/null differ
diff --git a/.build/loader.lst b/.build/loader.lst
deleted file mode 100644
index af049d6..0000000
--- a/.build/loader.lst
+++ /dev/null
@@ -1,57 +0,0 @@
-; --------------------------------------
-; zasm: assemble "loader.z80"
-; date: 2021-01-14 02:43:53
-; --------------------------------------
-
-
-;Retrieves CP/M from disk and loads it in memory starting at E400h
-;Uses calls to ROM subroutine for disk read.
-;Reads track 0, sectors 2 to 26, then track 1, sectors 1 to 25
-;This program is loaded into LBA sector 0 of disk, read to loc. 0800h by ROM disk_read subroutine, and executed.
-
-#target bin
-#code _HOME, 0x1100
-
-hstbuf    equ 0x1200         ;will put 256-byte raw sector here
-disk_read equ 0x0296         ;subroutine in 2K ROM
-cpm       equ 0xFA00         ;CP/M cold start entry in BIOS
-
-main:
-	ld c,1                   ;LBA bits 0 to 7
-	ld b,0                   ;LBA bits 8 to 15
-	ld e,0                   ;LBA bits 16 to 23
-	ld hl,0xE400             ; Memory address -- start of CCP
-
-loop:
-	call disk_read           ;subroutine in ROM
-	ld a,c
-	cp 50
-	jp z,done
-	inc a
-	ld c,a
-	jp loop
-
-done:
-	out (1),a                ;switch memory config to all-RAM
-	jp cpm                   ;to BIOS cold start entry
-
-
-; +++ segments +++
-
-#CODE _HOME    = $1100 =  4352,  size = $001C =    28
-
-; +++ global symbols +++
-
-_HOME      = $1100 =  4352  _HOME   loader.z80:6 (unused)
-_HOME_end  = $111C =  4380  _HOME   loader.z80:6 (unused)
-_HOME_size = $001C =    28  _HOME   loader.z80:6 (unused)
-cpm        = $FA00 = 64000  _HOME   loader.z80:11
-disk_read  = $0296 =   662  _HOME   loader.z80:10
-done       = $1117 =  4375  _HOME   loader.z80:28
-hstbuf     = $1200 =  4608  _HOME   loader.z80:9 (unused)
-loop       = $1109 =  4361  _HOME   loader.z80:19
-main       = $1100 =  4352  _HOME   loader.z80:13 (unused)
-
-
-total time: 0.0002 sec.
-no errors
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..30bcfa4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.build/