Misc. Cleanup

- Regenerate documentation
- Improve CP/M 3 drive assignment handling
- Fixed SYSCOPY issue with new partition handling

Source/CBIOS/cbios.asm

@@ -1358,6 +1358,8 @@ DSK_MBR0:
 ;
 #IFDEF PLTWBW
 	; SWITCH TO BIOS BANK TO ACCESS DISK BUFFER
+	LD	(STKSAV),SP	; SAVE CUR STACK
+	LD	SP,XSTACK	; NEW STACK IN HI MEM
 	LD	A,(HB_CURBNK)	; GET CUR BANK
 	PUSH	AF		; SAVE CUR BANK
 	LD	A,(BNKBIOS)	; BIOS BANK
@@ -1370,7 +1372,12 @@ DSK_MBR0:
 	LD	A,H		; PREV BANK TO A
 	CALL	HB_BNKSEL	; SELECT IT
 	POP	AF		; ORIGINAL RESULT BACK
+	LD	SP,(STKSAV)	; RESTORE ORIGINAL STACK
 	RET
+	
+	.FILL	32,0
+XSTACK	.EQU	$
+
 #ENDIF
 ;
 DSK_MBR1:
@@ -1700,6 +1707,7 @@ CCPBUF		.DW	0		; ADDRESS OF CCP BUF IN BIOS BANK
 MEDID		.DB	0		; TEMP STORAGE FOR MEDIA ID
 SLICE		.DB	0		; CURRENT SLICE
 SPS		.DW	0		; SECTORS PER SLICE
+STKSAV		.DW	0		; TEMP SAVED STACK POINTER
 ;
 #IFDEF PLTWBW
 BNKBIOS		.DB	0		; BIOS BANK ID