Fix: If the Slice=0 and No CPM partition, boot the disk, ignore all Calculations and checks.

Source/HBIOS/hbios.asm

@@ -5061,7 +5061,12 @@ EXT_SLICE3B:
 	JR	EXT_SLICE4A		; CONTINUE AND COMPUTE THE SLICE
 ;
 EXT_SLICE3C:
-	; NO PARTITION TABLE FOUND / NO CPM PARTITION FOUND -> HD512
+	; NO PARTITION TABLE FOUND / NO CPM PARTITION
+	LD	A,(SLICE_SLICE)		; IF SLICE = 0, WE BOOT THE DISK ITSELF. IGNORE SLICE(S)
+	OR      A           		; SET FLAGS FOR SLICE ARGUMENT, IF SLICE==0
+	JR	Z,EXT_SLICE5Z		; BYPASS ALL CALCS / CHECKS - JUST BOOT THE DISK
+
+	; BOOT SLICE WITH LEGACY SPS
 	LD	BC,SPS_HD512		; WITH HD512 SECTORS PER SLICE
 	LD	(SLICE_SPS),BC		; STORE IT
 
@@ -5089,8 +5094,7 @@ EXT_SLICE4A:
 	LD	BC,(SLICE_SPS)
 	LD	A,(SLICE_SLICE)
 	OR      A           		; SLICE NUMBER - SET FLAGS TO CHECK LOOP CTR
-	;JR      Z,EXT_SLICE5A 		; NOTHING TO COUNT
-	JR	Z,EXT_SLICE6		; BYPASS CAPACITY CHECK IF SLICE == 0
+	JR      Z,EXT_SLICE5A 		; NOTHING TO COUNT
 EXT_SLICE4B:
 	ADD     HL,BC       		; ADD ONE SLICE (SPS) TO LOW WORD
 	JR      NC,EXT_SLICE4C 		; CHECK FOR CARRY
@@ -5141,6 +5145,10 @@ EXT_SLICE5C:
 	OR      A
 	RET
 ;
+EXT_SLICE5Z:
+	LD      HL,0			; BOOT THE DISK TO LBA = 0
+	LD      DE,0			;
+;
 EXT_SLICE6:
 	; FINAL CALC AND RETURN SUCCESS
 	; ADD PARTITION OFFSET (START) TO DEHL TO GET ABSOLUTE SLICE OFFSET