build DOS-ordered disk image instead, fiddle with drive 2 check and UI wording

Makefile

@@ -16,22 +16,24 @@ ACME=acme
 # https://github.com/mach-kernel/cadius
 CADIUS=cadius
 
-BUILDDISK=build/anti-m.po
+BUILDDISK=build/anti-m
 VOLUME=ANTI.M
 
 asm:
 	mkdir -p build
 	$(ACME) -r build/anti-m.lst src/anti-m.a
-	cp res/work.bin "$(BUILDDISK)"
+	cp res/work.bin "$(BUILDDISK)".po
 	cp res/_FileInformation.txt build/ >>build/log
-	$(CADIUS) ADDFILE "$(BUILDDISK)" "/${VOLUME}/" "build/ANTI.M.SYSTEM" >>build/log
+	$(CADIUS) ADDFILE "$(BUILDDISK)".po "/${VOLUME}/" "build/ANTI.M.SYSTEM" >>build/log
 	$(ACME) -r build/proboot.lst src/proboot.a
-	bin/changebootloader.py "$(BUILDDISK)" build/proboot
+	bin/changebootloader.py "$(BUILDDISK)".po build/proboot
+	bin/po2do.py build/ build/
+	rm "$(BUILDDISK)".po
 
 clean:
 	rm -rf build/
 
 mount:
-	open "$(BUILDDISK)"
+	open "$(BUILDDISK)".dsk
 
 all: clean asm mount

bin/po2do.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+import sys
+import glob
+import os.path
+
+kMap = {0x00: 0x00,
+        0x07: 0x08,
+        0x0E: 0x01,
+        0x06: 0x09,
+        0x0D: 0x02,
+        0x05: 0x0A,
+        0x0C: 0x03,
+        0x04: 0x0B,
+        0x0B: 0x04,
+        0x03: 0x0C,
+        0x0A: 0x05,
+        0x02: 0x0D,
+        0x09: 0x06,
+        0x01: 0x0E,
+        0x08: 0x07,
+        0x0F: 0x0F}
+
+indir, outdir = sys.argv[1:3]
+
+for infile in glob.glob(os.path.join(indir, "*.po")):
+    outfile = os.path.join(outdir, os.path.splitext(os.path.basename(infile))[0] + ".dsk")
+    with open(infile, 'rb') as f, open(outfile, 'wb') as g:
+        for track in range(0, 0x23):
+            sectors = [bytes(256)] * 0x10
+            for dos_sector in range(0, 0x10):
+                sectors[kMap[dos_sector]] = f.read(256)
+            g.write(b"".join(sectors))

src/anti-m.a

@@ -57,7 +57,7 @@ tmp      =     $FC        ; byte
          cmp   #$60
          bne   Boot
          jsr   CheckDrive2
-         bcc   Boot2
+         bne   Boot2
 @showprompt
          jsr   HOME
          lda   MACHINEID
@@ -162,18 +162,13 @@ CheckDrive2
          bne   --
          dey
          bpl   --
-         ldy   #0
--        lda   $C0EC
-         jsr   @knownret
-         pha
-         pla
-         cmp   $C0EC
-         clc
-         bne   +
+         lda   #$00
+         ldy   #$00
+-        eor   $C0EC
          dey
          bne   -
-         sec
-+        lda   $C0E8
+         sta   $C0E8
+         cmp   #$00
 @knownret
          rts
 
@@ -239,19 +234,13 @@ StringTable
          !word @mainmenu
 
 @header
-         !text "Anti-M v1.3-pre by 4am        2019-04-10"
+         !text "Anti-M v1.3-pre by 4am        2019-04-11"
          !text "________________________________________",$8D
-         !text $8D,$8D,$8D,$8D,$00
+         !text $8D,$8D,$8D,$8D,$8D,$8D,$8D,$8D,$00
 @mainmenu
          !text " Insert original disk in slot 6 drive 1",$8D
          !text $8D
-         !text "       and press <RETURN> to boot",$8D
-         !text $8D
-         !text "                   or",$8D
-         !text $8D
-         !text " Insert original disk in slot 6 drive 2",$8D
-         !text $8D
-         !text "          and press 2 to boot",$00
+         !text "       and press <RETURN> to boot",$8D,$00
 
          !src  "src/compare.a"
          !src  "src/idbroderbund.a"