;
; A standard CPM 2.2 Bios arrangement
; This linkage allows debugging DOS+ using pre-existing bios.
;
; The returned values from conout and home are optional.  The home
; value allows monitoring and controlling disk soft error operations.
; These optional values are returned by cbf BIOS/ROM on Kaypro 4 (83)
; which system DOES NOT disturb IX, IY, nor alternate registers.
entry	boot;	 0 boot			none		none
entry	wboot;	 1 wboot		 "		 "
entry	const;	 2 console status	 "		A=0FFH  ready
;							 =0 not ready
entry	conin;	 3 console input 	 "		A=console char
entry	conout;	 4 console output	C=console char	X/Y screen pos
entry	list;	 5 list output		C=list char	none
entry	punch;	 6 punch output		C=punch char	 "
entry	reader;	 7 reader input		none		A=reader char
entry	home;	 8 home disk		 "		^system table
entry	seldsk;	 9 select disk		C=drv # (0..15)	HL=^Disk table
;					E : 1 bit (lsb)
;					= 1 for re-access
;					= 0 for 1st access
;					(for disk sensing etc)
entry	settrk;	10 select track		BC=track #	none
entry	setsec;	11 select sector	BC=sector #	 "
entry	setdma;	12 set DMA address	BC=DMA address	 "
entry	read;	13 read 128 bytes	none		A = 0 no error
;							A <> 0 error
entry	write;	14 write 128 bytes;	C=0 write data	A = 0 no error
;					C=1 wrt dir.	A <> 0 error
;					C=2 wrt unalloc
entry	listst;	15 list status		none		A = 0ffh ready
;							A = 0 not ready
entry	sectrn;	16 sector translate	BC = sect	HL = sector #
;					DE = ^table
;					(from select)
;
; Optional timer service routine, patchable address in DOS+ offset 16h
; Value is 040h (string address only) for cbf BIOS/ROM on Kaypro 4/83
; XX	time	BC =0 get pointer only	HL=pointer to time array
;		BC <> 0 allows hard-	 HL+0^ date LSB days since
;		 ware to be updated	 HL+1^ date MSB (1=1978/1/1)
;		 if a routine call.	 HL+2^ hour (bcd)
;		 ignored if timead	 HL+3^ minute (bcd)
;		 is purely an address.	 HL+4^ seconds (bcd)
;		 BC^ time to set. (no secs) 
;					CARRY clear, NZ on exit.
;
; Optional entries, cbf bios/rom on Kaypro 4 (83)
;entry	punsta;	24 punch status		none		A = 0ffh ready
;							A = 0 not ready
;entry	rdrsta;	25 reader status	none		A = 0ffh ready
;							A = 0 not ready
;entry	gorom;	26 ROM executor @hl	a,b,c,d,e	a,f,d,e,h,l
;					& hl = locn 3	(sees 4000h up)
;

boot	equ	$;		 0 initialize
wboot	equ	boot+3;		 1 warm boot
const	equ	wboot+3;	 2 console status
conin	equ	const+3;	 3 console input
conout	equ	conin+3;	 4 console output
list	equ	conout+3;	 5 list output
punch	equ	list+3;		 6 punch output
reader	equ	punch+3;	 7 reader input
home	equ	reader+3;	 8 home disk
seldsk	equ	home+3;		 9 select disk
settrk	equ	seldsk+3;	10 select track
setsec	equ	settrk+3;	11 select sector
setdma	equ	setsec+3;	12 set DMA address
read	equ	setdma+3;	13 read 128 bytes
write	equ	read+3;		14 write 128 bytes
listst	equ	write+3;	15 list status
sectrn	equ	listst+3;	16 sector translate
;	
; Optional entries used cbf Kaypro 4/83 bios
punsta	equ	sectrn+24;	24 punch status
rdrsta	equ	punsta+3;	25 reader status
gorom	equ	rdrsta+3;	26 access Bank 0 ROM (hl^) routine
;				   passing a,b,c,d,e, hl=locn 3-4
;				   returning a,f,d,e,h,l
;				   (only memory from 04000h up is
;				    visible to the ROM procedures)
	end