Compaq MSB900L Digital-Logic Ag, If KEL Memory Offset 100h0 =, Emulation-Enabled bit

DIGITAL-LOGIC AG			MSB900/L Detailed Technical Manual V1.0
I/O Map	Continued…
I/O Addr.	Function	Size	R/W	Comment
				If KEL Memory Offset 100h[0] = 1(Emulation-
				Enabled bit).
060h	Keyboard/Mouse - Data Port	8bit	Yes
				If MSR 5140001Fh[0] = 1 (SNOOP bit) and
				KEL Memory Offset 100h[0] = 0 (Emulation-
				Enabled bit).
061h	Port B Control	8bit	Yes
062h-063h	No Specific Usage	---	---
				If KEL Memory Offset 100h[0] = 1
				(Emulation-Enabled bit).
064h	Keyboard/Mouse - Command/ Status	8bit	Yes	.
				If MSR 5140001Fh[0] = 1 (SNOOP
				bit) and KEL Memory Offset 100h[0]
				= 0 (Emulation-Enabled bit)
065h-06Fh	No Specific Usage	---	---
070h-071h	RTC RAM Address/Data Port	8bit	Yes	Options per MSR 51400014h[0]. (Note 1)
072h-073h	High RTC RAM Address/Data Port	8bit	Yes	Options per MSR 51400014h[1].
074-077h	No Specific Usage	---	---
078h-07Fh	No Specific Usage	---	---
080h	Post Code Display	8bit	Rec	Write LPC and DMA. Read only DMA.
081h	DMA Channel 2 Low Page			Upper addr bits [23:16]. Write LPC and
082h	DMA Channel 3 Low Page	8bit	Rec
				DMA. Read only DMA.
083h	DMA Channel 1 Low Page
084h-086h	No Specific Usage	8bit	Rec	Write LPC and DMA. Read only DMA.
087h	DMA Channel 0 Low Page	8bit	Rec	Upper addr bits [23:16]. Write LPC and DMA.
				Read only DMA.
088h	No Specific Usage	8bit	Rec	Write LPC and DMA. Read only DMA.
089h	DMA Channel 6 Low Page			Upper addr bits [23:16]. Write LPC and DMA.
		8bit	Rec
08Ah	DMA Channel 7 Low Page
				Read only DMA.
08B	DMA Channel 5 Low Page
08Ch-08Dh	No Specific Usage	8bit	Rec	Write LPC and DMA. Read only
08Eh	DMA
08Fh	DMA C4 Low Page	8bit	Rec	Upper addr bits [23:16]. See comment at 080h.
090h-091h	No Specific Usage	---	---
092h	Port A	8bit	Yes	If kel_porta_en is enabled, then access Port A;
				else access LPC.
093h-09Fh	No Specific Usage	---	---
0A0h	PIC Slave - Command/Status	8bit	Shw$
0A1h	PIC Slave - Command/Status	8bit	Shw$
0A2h-0BFh	No Specific Usage	8bit	---
0C0h	Master DMA Address - Channel 4	8bit	Yes	16bit values in two transfers.
0C1h	No Specific Usage	8bit	---
0C2h	Master DMA Counter - Channel 4	8bit	Yes	16bit values in two transfers.
0C3h	No Specific Usage	8bit	---
0C4h	Master DMA Address - Channel 5	8bit	Yes	16bit values in two transfers.
0C6h	Master DMA Counter - Channel 5	8bit	Yes	16bit values in two transfers.
0C7h	No Specific Usage	8bit	---
0C8h	Master DMA Address - Channel 6	8bit	Yes	16bit values in two transfers.
0CAh	Master DMA Counter - Channel 6	8bit	Yes	16bit values in two transfers.
0CBh	No Specific Usage	8bit	---
Continued…

37