diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index da00ccd0..03a58402 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -514,15 +514,21 @@ HBX_ROM:
         OR      A                       ; SET FLAGS
         JP      P,HBX_ROM               ; BIT 7 INDICATES RAM
         OUT     (MPCL_ROM),A            ; ENSURE ROM PAGE OUT OF MEMORY BEFORE SWITCH
-
-#IF (RAMSIZE == 256)
-	XOR	%00000100		; TOP 32K IS ALWAYS IN FIRST CHIP
-#ENDIF
-
-#IF (RAMSIZE == 1024)
-	XOR	%00010000		; TOP 32K IS ALWAYS IN FIRST CHIP
-#ENDIF
-
+;
+	PUSH	HL			; FORCE TOP 32K
+	LD	HL,(HCB + HCB_RAMBANKS)	; TO BE IN FIRST CHIP
+	SRL	L
+	XOR	L			; MAYBE PRECALCULATE THIS
+	POP	HL			; AT INITIALIZATION
+;
+;#IF (RAMSIZE == 256)
+;	XOR	%00000100		; TOP 32K IS ALWAYS IN FIRST CHIP	; 256K = 8 banks = 00001000
+;#ENDIF
+;
+;#IF (RAMSIZE == 1024)
+;	XOR	%00010000		; TOP 32K IS ALWAYS IN FIRST CHIP	; 1024K = 32 banks = 00100000
+;#ENDIF
+;
         OUT     (MPCL_RAM),A            ; SET RAM PAGE SELECTOR
 	JR	HBX_RAMX
 HBX_ROM:
@@ -2041,7 +2047,15 @@ HB_Z280BUS1:
 	CALL	PRTDEC
 	CALL	PRTSTRD
 	.TEXT	"KB ROM, $"
-	LD	HL,RAMSIZE
+;
+	LD	HL,(HCB + HCB_RAMBANKS)	; GET NUMBER OF BANKS IN L
+	LD	H,0			; CALCULATE RAM SIZE
+	ADD	HL,HL
+	ADD	HL,HL			; X4
+	ADD	HL,HL			; X8
+	ADD	HL,HL			; X16
+	ADD	HL,HL			; X32
+;
 	CALL	PRTDEC
 	CALL	PRTSTRD
 	.TEXT	"KB RAM$"
@@ -2074,7 +2088,7 @@ HB_Z280BUS1:
 ;
 ; ROM CHECKSUM VERIFICATION
 ; EACH OF THE FIRST 4 ROM BANKS HAS A CHECKSUM INJECTED SUCH THAT
-; A COMPUTED CHECKSUM ACROSS THE ENTIRE BANK SHOLD ALWAYS BE ZERO
+; A COMPUTED CHECKSUM ACROSS THE ENTIRE BANK SHOULD ALWAYS BE ZERO
 ;
 HB_ROMCK:
 	CALL	NEWLINE
@@ -3512,7 +3526,8 @@ SYS_GETCPUINFO:
 ;
 SYS_GETMEMINFO:
 	LD	D,ROMSIZE / 32
-	LD	E,RAMSIZE / 32
+	LD	A,(HCB + HCB_RAMBANKS)
+	LD	E,A
 	XOR	A
 	RET
 ;
diff --git a/Source/HBIOS/md.asm b/Source/HBIOS/md.asm
index 10da7303..dfc4f000 100644
--- a/Source/HBIOS/md.asm
+++ b/Source/HBIOS/md.asm
@@ -64,7 +64,7 @@ MD_INIT:
 #IF (MDFFENABLE)
 	CALL	MD_FINIT		; PROBE FLASH CAPABILITY
 #ENDIF
-
+;
 	CALL	NEWLINE			; FORMATTING
 	PRTS("MD: UNITS=$")
 	LD	A,MD_DEVCNT
@@ -72,14 +72,32 @@ MD_INIT:
 ;
 #IF (MDROM)
 	PRTS(" ROMDISK=$")
-	LD	HL,ROMSIZE - 128
+;	LD	HL,ROMSIZE - 128
+	LD	A,(HCB + HCB_ROMBANKS)	; GET NUMBER OF BANKS
+	SUB	(TOT_ROM_RB)
+	LD	L,A
+	LD	H,0			; CALCULATE RAM SIZE
+	ADD	HL,HL			; X2
+	ADD	HL,HL			; X4
+	ADD	HL,HL			; X8
+	ADD	HL,HL			; X16
+	ADD	HL,HL			; X32
 	CALL	PRTDEC
 	PRTS("KB$")
 #ENDIF
 ;
 #IF (MDRAM)
 	PRTS(" RAMDISK=$")
-	LD	HL,RAMSIZE - 256
+;	LD	HL,RAMSIZE - 256
+	LD	A,(HCB + HCB_RAMBANKS)	; GET NUMBER OF BANKS
+	SUB	(TOT_RAM_RB)		; LESS RESERVED BANKS
+	LD	L,A
+	LD	H,0			; CALCULATE RAM SIZE
+	ADD	HL,HL			; X2
+	ADD	HL,HL			; X4
+	ADD	HL,HL			; X8
+	ADD	HL,HL			; X16
+	ADD	HL,HL			; X32
 	CALL	PRTDEC
 	PRTS("KB$")
 #ENDIF
@@ -170,11 +188,11 @@ MD_CAP:					; ASSUMES THAT UNIT 0 IS RAM, UNIT 1 IS ROM
 	RET
 MD_CAP0:
 	LD	A,(HCB + HCB_RAMBANKS)	; POINT TO RAM BANK COUNT
-	LD	B,4			; SET # RESERVED RAM BANKS
+	LD	B,TOT_RAM_RB		; SET # RESERVED RAM BANKS
 	JR	MD_CAP2
 MD_CAP1:
 	LD	A,(HCB + HCB_ROMBANKS)	; POINT TO ROM BANK COUNT
-	LD	B,8			; SET # RESERVED ROM BANKS
+	LD	B,TOT_ROM_RB		; SET # RESERVED ROM BANKS
 MD_CAP2:
 	SUB	B			; SUBTRACT OUT RESERVED BANKS
 	LD	H,A			; H := # BANKS
@@ -756,7 +774,8 @@ MD_TGTDEV	.EQU	0B7BFH		; TARGET CHIP FOR R/W FILESYSTEM 39SF040
 ;======================================================================
 ;
 MD_FINIT:
-	LD	A,+(ROMSIZE/512)	; DISLAY NUMBER
+	CALL	MD_CALCU			; DISPLAY
+;
 #IF (MD_FVBS==1)
 	CALL	NEWLINE			; OF UNITS 
 	PRTS("MD: FLASH=$")
@@ -773,7 +792,8 @@ MD_PROBE:
 	PUSH	BC
 #IF (MD_FVBS==1)
 	CALL	PC_SPACE
-	LD	A,+(ROMSIZE/512)+1
+	CALL	MD_CALCU
+	INC	A
 	SUB	B			; PRINT
 	CALL	PRTDECB			; DEVICE 
 	LD	A,'='			; NUMBER
@@ -818,6 +838,17 @@ MD_PR1:	CALL	WRITESTR
 	XOR	A			; INIT SUCCEEDED
 	RET
 ;
+; CALCULATE NUMBER OF 512KB ROMS FROM NUMBER OF ROM BANKS
+;
+MD_CALCU:
+;	LD	A,+(ROMSIZE/512)	; DISPLAY NUMBER
+	LD	A,(HCB + HCB_ROMBANKS)	; GET NUMBER OF BANKS
+	SRL	A			; X2 CALCULATE
+	SRL	A			; X4 NUMBER OF 512KB
+	SRL	A			; X8 CHIPS THAT IS
+	SRL	A
+	RET
+;
 ;======================================================================
 ; LOOKUP AND DISPLAY CHIP
 ;
@@ -847,7 +878,7 @@ MD_NXT1:LD	A,(HL)
 ;
 	INC	HL
 	INC	HL
-	JR	FF_NXT2			; MATCH SO EXIT
+	JR	MD_NXT2			; MATCH SO EXIT
 ;
 MD_NXT0:PUSH	BC			; WE DIDN'T MATCH SO POINT
 	LD	BC,MD_T_SZ		; TO THE NEXT TABLE ENTRY
@@ -861,7 +892,7 @@ MD_NXT0:PUSH	BC			; WE DIDN'T MATCH SO POINT
 ;
 	LD	HL,MD_FFMSGUNK		; WE REACHED THE END WITHOUT A MATCH
 ;
-FF_NXT2:
+MD_NXT2:
 #IF (MD_FVBS==1)
 	CALL	PRTSTR			; AFTER SEARCH DISPLAY THE RESULT
 #ENDIF
diff --git a/Source/HBIOS/std.asm b/Source/HBIOS/std.asm
index 1585f4e8..8e56796e 100644
--- a/Source/HBIOS/std.asm
+++ b/Source/HBIOS/std.asm
@@ -488,14 +488,26 @@ SYSTIM	.SET	TM_Z280
 ;
 ; MEMORY BANK CONFIGURATION
 ;
+; PLT_RAM_R	HOW MUCH RAM NEEDS TO BE RESERVED FOR SPECIFIC PLATFORMS
+; WBW_RAM_R	HOW MUCH RAM NEEDS TO BE RESERVED FOR ROMWBW
+; PLT_ROM_R	HOW MUCH ROM NEEDS TO BE RESERVED FOR SPECIFIC PLATFORMS
+; WBW_ROM_R	HOW MUCH ROM NEEDS TO BE RESERVED FOR ROMWBW
+;
+PLT_RAM_R	.EQU	0	; 0K
+PLT_ROM_R	.EQU	0	; 0K
+WBW_ROM_R	.EQU	128	; 128K			; TOTAL RESERVED ROM
+WBW_RAM_R	.EQU	256	; 256K			; TOTAL RESERVED RAM
+TOT_ROM_RB	.EQU	(PLT_ROM_R + WBW_ROM_R)/32	; TOTAL ROM BANKS RESERVED
+TOT_RAM_RB	.EQU	(PLT_RAM_R + WBW_RAM_R)/32	; TOTAL RAM BANKS RESERVED
+;
 #IF (BIOS == BIOS_UNA)
-BID_ROM0	.EQU	$0000 + (ROM_RESERVE / 32)
-BID_RAM0	.EQU	$8000 + (RAM_RESERVE / 32)
+BID_ROM0	.EQU	$0000 + (PLT_ROM_R / 32)
+BID_RAM0	.EQU	$8000 + (PLT_RAM_R / 32)
 #ENDIF
 ;
 #IF (BIOS == BIOS_WBW)
-BID_ROM0	.EQU	$00 + (ROM_RESERVE / 32)
-BID_RAM0	.EQU	$80 + (RAM_RESERVE / 32)
+BID_ROM0	.EQU	$00 + (PLT_ROM_R / 32)
+BID_RAM0	.EQU	$80 + (PLT_RAM_R / 32)
 #ENDIF
 
 BID_ROMN	.EQU	(BID_ROM0 + ((ROMSIZE / 32) - 1))