diff --git a/.gitignore b/.gitignore
index de5cc743..a468cb9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -98,6 +98,7 @@ Tools/unix/zx/zx
 !Source/ZSDOS/*.[Cc][Oo][Mm]
 !Source/ZRC/*.bin
 !Source/ZRC512/*.bin
+!Source/EZ512/*.bin
 !Source/Z1RCC/*.bin
 !Source/ZZRCC/*.bin
 !Source/FZ80/*.bin
diff --git a/Source/EZ512/ez512_cfldr.bin b/Source/EZ512/ez512_cfldr.bin
new file mode 100644
index 00000000..a819d677
Binary files /dev/null and b/Source/EZ512/ez512_cfldr.bin differ
diff --git a/Source/EZ512/ez512_mon.bin b/Source/EZ512/ez512_mon.bin
new file mode 100644
index 00000000..67f86b5b
Binary files /dev/null and b/Source/EZ512/ez512_mon.bin differ
diff --git a/Source/EZ512/ez512_ptbl.bin b/Source/EZ512/ez512_ptbl.bin
new file mode 100644
index 00000000..5e9fc41d
Binary files /dev/null and b/Source/EZ512/ez512_ptbl.bin differ
diff --git a/Source/HBIOS/Config/RCZ80_ez512_std.asm b/Source/HBIOS/Config/RCZ80_ez512_std.asm
new file mode 100644
index 00000000..cc926d55
--- /dev/null
+++ b/Source/HBIOS/Config/RCZ80_ez512_std.asm
@@ -0,0 +1,112 @@
+;
+;==================================================================================================
+;   ROMWBW DEFAULT BUILD SETTINGS FOR RCBUS Z80 ZRC512
+;==================================================================================================
+;
+; THIS FILE DEFINES THE DEFAULT CONFIGURATION SETTINGS FOR THE PLATFORM
+; INDICATED ABOVE.  THESE SETTINGS DEFINE THE OFFICIAL BUILD FOR THIS
+; PLATFORM AS DISTRIBUTED IN ROMWBW RELEASES.
+;
+; ROMWBW USES CASCADING CONFIGURATION FILES AS INDICATED BELOW:
+;
+; cfg_MASTER.asm			- MASTER: CONFIGURATION FILE DEFINES ALL POSSIBLE ROMWBW SETTINGS
+; |
+; +-> cfg_<platform>.asm		- PLATFORM: DEFAULT SETTINGS FOR SPECIFIC PLATFORM
+;     |
+;     +-> Config/<plt>_std.asm		- BUILD: SETTINGS FOR EACH OFFICIAL DIST BUILD
+;         |
+;         +-> Config/<plt>_<cust>.asm	- USER: CUSTOM USER BUILD SETTINGS
+;
+; THE TOP (MASTER CONFIGURATION) FILE DEFINES ALL POSSIBLE ROMWBW
+; CONFIGURATION SETTINGS. EACH FILE BELOW THE MASTER CONFIGURATION FILE
+; INHERITS THE CUMULATIVE SETTINGS OF THE FILES ABOVE IT AND MAY
+; OVERRIDE THESE SETTINGS AS DESIRED.
+;
+; OTHER THAN THE TOP MASTER FILE, EACH FILE MUST "#INCLUDE" ITS PARENT
+; FILE (SEE #INCLUDE STATEMENT BELOW).  THE TOP TWO FILES SHOULD NOT BE
+; MODIFIED.
+;
+; TO CUSTOMIZE YOUR BUILD SETTINGS YOU SHOULD MODIFY THIS FILE, THE
+; DEFAULT BUILD SETTINGS (Config/<platform>_std.asm) OR PREFERABLY
+; CREATE AN OPTIONAL CUSTOM USER SETTINGS FILE THAT INCLUDES THE DEFAULT
+; BUILD SETTINGS FILE (SEE EXAMPLE Config/SBC_user.asm).
+;
+; BY CREATING A CUSTOM USER SETTINGS FILE, YOU ARE LESS LIKELY TO BE
+; IMPACTED BY FUTURE CHANGES BECAUSE YOU WILL BE INHERITING MOST
+; OF YOUR SETTINGS WHICH WILL BE UPDATED BY AUTHORS AS ROMWBW EVOLVES.
+;
+; PLEASE REFER TO THE CUSTOM BUILD INSTRUCTIONS (README.TXT) IN THE
+; SOURCE DIRECTORY (TWO DIRECTORIES ABOVE THIS ONE).
+;
+; *** WARNING: ASIDE FROM THE MASTER CONFIGURATION FILE, YOU MUST USE
+; ".SET" TO OVERRIDE SETTINGS.  THE ASSEMBLER WILL ERROR IF YOU ATTEMPT
+; TO USE ".EQU" BECAUSE IT WON'T LET YOU REDEFINE A SETTING WITH ".EQU".
+;
+#DEFINE PLATFORM_NAME "EaZy80-512", " [", CONFIG, "]"
+;
+#DEFINE	BOOT_DEFAULT	"H"		; DEFAULT BOOT LOADER CMD FOR EMPTY CMD LINE
+#DEFINE AUTO_CMD	""		; AUTO CMD WHEN BOOT_TIMEOUT IS ENABLED
+;
+#INCLUDE "cfg_RCZ80.asm"
+;
+CPUOSC		.SET	22000000	; CPU OSC FREQ IN MHZ
+;
+INTMODE		.SET	2		; INTERRUPTS: 0=NONE, 1=MODE 1, 2=MODE 2, 3=MODE 3 (Z280)
+;
+KIOENABLE	.SET	TRUE		; ENABLE ZILOG KIO SUPPORT
+KIOBASE		.SET	$00		; KIO BASE I/O ADDRESS
+;
+RAMSIZE		.SET	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
+ROMSIZE		.SET	0		; SIZE OF ROM IN KB (MUST MATCH YOUR HARDWARE!!!)
+MEMMGR		.SET	MM_EZ512	; MEMORY MANAGER: MM_[SBC|Z2|N8|Z180|Z280|MBC|RPH|MON|EZ512]
+FPLED_ENABLE	.SET	TRUE		; FP: ENABLES FRONT PANEL LEDS
+FPSW_ENABLE	.SET	TRUE		; FP: ENABLES FRONT PANEL SWITCHES
+CRTACT		.SET	FALSE		; ACTIVATE CRT (VDU,CVDU,PROPIO,ETC) AT STARTUP
+VDAEMU_SERKBD	.SET	$FF		; VDA EMULATION: SERIAL KBD UNIT #, OR $FF FOR HW KBD
+;
+CTCENABLE	.SET	TRUE		; ENABLE ZILOG CTC SUPPORT
+CTCBASE		.SET	KIOBASE+$04	; CTC BASE I/O ADDRESS
+CTCTIMER	.SET	TRUE		; ENABLE CTC PERIODIC TIMER
+CTCOSC		.SET	3686400		; CTC CLOCK FREQUENCY
+;
+DUARTENABLE	.SET	FALSE		; DUART: ENABLE 2681/2692 SERIAL DRIVER (DUART.ASM)
+;
+UARTENABLE	.SET	TRUE		; UART: ENABLE 8250/16550-LIKE SERIAL DRIVER (UART.ASM)
+ACIAENABLE	.SET	TRUE		; ACIA: ENABLE MOTOROLA 6850 ACIA DRIVER (ACIA.ASM)
+;
+SIOENABLE	.SET	TRUE		; SIO: ENABLE ZILOG SIO SERIAL DRIVER (SIO.ASM)
+SIOCNT		.SET	1		; SIO: NUMBER OF CHIPS TO DETECT (1-2), 2 CHANNELS PER CHIP
+SIO0MODE	.SET	SIOMODE_STD	; SIO 0: CHIP TYPE: SIOMODE_[STD|RC|SMB|ZP|Z80R]
+SIO0BASE	.SET	KIOBASE+$08	; SIO 0: REGISTERS BASE ADR
+SIO0ACLK	.SET	CTCOSC		; SIO 0A: OSC FREQ IN HZ, ZP=2457600/4915200, RC/SMB=7372800
+SIO0ACTCC	.SET	0		; SIO 0A: CTC CHANNEL 0=A, 1=B, 2=C, 3=D, -1 FOR NONE
+SIO0BCLK	.SET	CTCOSC		; SIO 0B: OSC FREQ IN HZ, ZP=2457600/4915200, RC/SMB=7372800
+SIO0BCTCC	.SET	1		; SIO 0B: CTC CHANNEL 0=A, 1=B, 2=C, 3=D, -1 FOR NONE
+;
+TMSENABLE	.SET	FALSE		; TMS: ENABLE TMS9918 VIDEO/KBD DRIVER (TMS.ASM)
+TMSMODE		.SET	TMSMODE_MSX	; TMS: DRIVER MODE: TMSMODE_[SCG|N8|MSX|MSXKBD|MSXMKY|MBC|COLECO|DUO|NABU]
+TMS80COLS	.SET	FALSE		; TMS: ENABLE 80 COLUMN SCREEN, REQUIRES V9958
+TMSTIMENABLE	.SET	FALSE		; TMS: ENABLE TIMER INTERRUPTS (REQUIRES IM1)
+VRCENABLE	.SET	TRUE		; VRC: ENABLE VGARC VIDEO/KBD DRIVER (VRC.ASM)
+EFENABLE	.SET	FALSE		; EF: ENABLE EF9345 VIDEO DRIVER (EF.ASM)
+;
+MDROM		.SET	FALSE		; MD: ENABLE ROM DISK
+;
+FDENABLE	.SET	TRUE		; FD: ENABLE FLOPPY DISK DRIVER (FD.ASM)
+FDMODE		.SET	FDMODE_RCWDC	; FD: DRIVER MODE: FDMODE_[DIO|ZETA|ZETA2|DIDE|N8|DIO3|RCSMC|RCWDC|DYNO|EPFDC|MBC]
+;
+IDEENABLE	.SET	TRUE		; IDE: ENABLE IDE DISK DRIVER (IDE.ASM)
+;
+PPIDEENABLE	.SET	TRUE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM)
+;
+SDENABLE	.SET	TRUE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
+SDMODE		.SET	SDMODE_EZ512	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT|USR|PIO|Z80R|EPITX|FZ80|GM|EZ512]
+SDCNT		.SET	1		; SD: NUMBER OF SD CARD DEVICES (1-2), FOR DSD/SC/MT ONLY
+PRPENABLE	.SET	FALSE		; PRP: ENABLE ECB PROPELLER IO BOARD DRIVER (PRP.ASM)
+IMMENABLE	.SET	FALSE		; IMM: ENABLE IMM DISK DRIVER (IMM.ASM)
+;
+SN76489ENABLE	.SET	FALSE		; SN: ENABLE SN76489 SOUND DRIVER
+;
+AY38910ENABLE	.SET	FALSE		; AY: ENABLE AY-3-8910 / YM2149 SOUND DRIVER
+AYMODE		.SET	AYMODE_RCZ80	; AY: DRIVER MODE: AYMODE_[SCG|N8|RCZ80|RCZ180|MSX|LINC|MBC|DUO|NABU]
+AY_FORCE	.SET	FALSE		; AY: BYPASS AUTO-DETECT, FORCED PRESENT
diff --git a/Source/HBIOS/sd.asm b/Source/HBIOS/sd.asm
index cd97c26c..36090bb6 100644
--- a/Source/HBIOS/sd.asm
+++ b/Source/HBIOS/sd.asm
@@ -453,6 +453,7 @@ SD_CINIT	.EQU	TRUE		; INITIALIZE OUTPUT PORT
 SD_DDR		.EQU	$03		; DATA DIRECTION REGISTER
 SD_DDRVAL	.EQU	%11100110	; DATA DIRECTION REGISTER VALUE
 SD_INVCS	.EQU	TRUE		; INVERT CS
+		DEVECHO	"EZ512"
 #ENDIF
 ;
 		DEVECHO	", IO="
@@ -713,6 +714,13 @@ SD_INIT:
 	LD	A,SD_IOBASE
 	CALL	PRTHEXBYTE
 #ENDIF
+;
+#IF (SDMODE == SDMODE_EZ512)
+	PRTS(" MODE=EZ512$")
+	PRTS(" IO=0x$")
+	LD	A,SD_IOBASE
+	CALL	PRTHEXBYTE
+#ENDIF
 ;
 	CALL	SD_PROBE		; CHECK FOR HARDWARE
 	JR	Z,SD_INIT00		; CONTINUE IF PRESENT