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MPM OPERATING SYSTEMS/MPM II/MPM II SOURCE/MPMLDR/LDRBIOS.ASM

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+	title	'MP/M II V2.0 Skeleton Ldrbios'
+
+
+;	Copyright (C) 1978, 1979, 1980, 1981
+;	Digital Research
+;	Box 579, Pacific Grove
+;	California, 93950
+
+;  Revised:
+;    14 Sept 81 by Thomas Rolander
+
+false	equ	0
+true	equ	not false
+
+
+	org	1700h
+
+
+buff	equ	0080h	;default buffer address
+
+;	jump vector for indiviual routines
+
+	jmp	boot
+wboote:	jmp	wboot
+	jmp	const
+	jmp	conin
+	jmp	conout
+	jmp	list
+	jmp	punch
+	jmp	reader
+	jmp	home
+	jmp	seldsk
+	jmp	settrk
+	jmp	setsec
+	jmp	setdma
+	jmp	read
+	jmp	write
+	jmp	list$st		; list status poll
+	jmp	sect$tran	; sector translation
+
+
+boot:
+wboot:
+gocpm:
+	ret
+
+crtin:			; crt: input
+	ret
+crtout:			; crt: output
+	ret
+crtst:			; crt: status
+	ret
+ttyin:			; tty: input
+	ret
+ttyout:			; tty: output
+	ret
+lptout:			; lpt: output
+	ret
+lpt$st:
+	ret
+
+conin	equ	crtin
+const	equ	crtst
+conout	equ	crtout
+reader	equ	ttyin
+punch	equ	ttyout
+list	equ	lptout
+listst	equ	lptst
+
+seldsk:	;select disk given by register c
+	ret
+;
+home:	;move to home position
+	ret
+;
+settrk:	;set track number given by c
+	ret
+;
+setsec:	;set sector number given by c
+	ret
+;
+setdma:	;set dma address given by regs b,c
+	ret
+;
+sect$tran:		; translate the sector # in <c> if needed
+	ret
+;
+read:	;read next disk record (assuming disk/trk/sec/dma set)
+	ret
+;
+write:	;disk write function
+	ret
+;
+	end
+
+