diff --git a/Source/HBIOS/cfg_dyno.asm b/Source/HBIOS/cfg_dyno.asm
index 6e034243..83d7e0c5 100644
--- a/Source/HBIOS/cfg_dyno.asm
+++ b/Source/HBIOS/cfg_dyno.asm
@@ -113,6 +113,7 @@ PPIDEENABLE	.EQU	TRUE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM)
 PPIDEMODE	.EQU	PPIDEMODE_DYNO	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	FALSE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_PPI	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_master.asm b/Source/HBIOS/cfg_master.asm
index 8c3e18e2..8a004eb8 100644
--- a/Source/HBIOS/cfg_master.asm
+++ b/Source/HBIOS/cfg_master.asm
@@ -172,6 +172,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_NONE	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	FALSE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_NONE	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_mk4.asm b/Source/HBIOS/cfg_mk4.asm
index ef2131dc..dd2e31a5 100644
--- a/Source/HBIOS/cfg_mk4.asm
+++ b/Source/HBIOS/cfg_mk4.asm
@@ -127,6 +127,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_DIO3	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	TRUE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_MK4	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_n8.asm b/Source/HBIOS/cfg_n8.asm
index 0936dae8..ac917b95 100644
--- a/Source/HBIOS/cfg_n8.asm
+++ b/Source/HBIOS/cfg_n8.asm
@@ -130,6 +130,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_N8	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	TRUE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_CSIO	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_rcz180.asm b/Source/HBIOS/cfg_rcz180.asm
index 41bfc5e0..e3a1d7bb 100644
--- a/Source/HBIOS/cfg_rcz180.asm
+++ b/Source/HBIOS/cfg_rcz180.asm
@@ -133,6 +133,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_RC	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	FALSE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_PPI	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index 89b70b4f..e8f91bc4 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -137,6 +137,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_RC	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	FALSE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_PPI	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_sbc.asm b/Source/HBIOS/cfg_sbc.asm
index 120b468c..b7027b23 100644
--- a/Source/HBIOS/cfg_sbc.asm
+++ b/Source/HBIOS/cfg_sbc.asm
@@ -130,6 +130,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_SBC	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	FALSE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_JUHA	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/cfg_scz180.asm b/Source/HBIOS/cfg_scz180.asm
index 39677f51..0b90bc61 100644
--- a/Source/HBIOS/cfg_scz180.asm
+++ b/Source/HBIOS/cfg_scz180.asm
@@ -128,6 +128,7 @@ PPIDEENABLE	.EQU	FALSE		; PPIDE: ENABLE PARALLEL PORT IDE DISK DRIVER (PPIDE.ASM
 PPIDEMODE	.EQU	PPIDEMODE_RC	; PPIDE: DRIVER MODE: PPIDEMODE_[SBC|DIO3|MFP|N8|RC|DYNO]
 PPIDETRACE	.EQU	1		; PPIDE: TRACE LEVEL (0=NO,1=ERRORS,2=ALL)
 PPIDE8BIT	.EQU	FALSE		; PPIDE: USE 8-BIT TRANSFERS (CF CARDS MOSTLY)
+PPICNT		.EQU	1		; PPIDE: NUMBER OF 8255 PPI INTERFACES
 ;
 SDENABLE	.EQU	TRUE		; SD: ENABLE SD CARD DISK DRIVER (SD.ASM)
 SDMODE		.EQU	SDMODE_SC	; SD: DRIVER MODE: SDMODE_[JUHA|N8|CSIO|PPI|UART|DSD|MK4|SC|MT]
diff --git a/Source/HBIOS/ppide.asm b/Source/HBIOS/ppide.asm
index b0850329..63a6ae86 100644
--- a/Source/HBIOS/ppide.asm
+++ b/Source/HBIOS/ppide.asm
@@ -170,10 +170,10 @@ PPIDE_REG_DRVADR	.EQU	PPIDE_CTL_CS3FX | $07	; DRIVE ADDRESS REGISTER (R)
 ;
 PPIDE0IO	.EQU	PPIDE_IO_BASE
 PPIDE1IO	.EQU	20H
-PPIDE2IO	.EQU	00H
+PPIDE2IO	.EQU	44H
 PPIDE3IO	.EQU	00H
 ;
-PPIDE_DEVCNT		.EQU	4	; ASSUME ONLY PRIMARY INTERFACE
+PPIDE_DEVCNT		.EQU	PPICNT*2
 ;
 ; COMMAND BYTES
 ;