;
; System constant definition for the XBIOS system
;
; Version: 1
; Date:    September 27, 1987
;
mvers	equ	1
;
; Definition of entry points in BIOS and the banked BIOS modules.
;	These represent the entry points relative to the beginning of the module.
;	Only the first group are entry points to the TPA based BIOS module.
;
b_boot	    equ	0*3		; Cold boot
b_wboot	    equ	1*3		; Warm boot
b_const	    equ	2*3		; Console status
b_conin	    equ	3*3		; Console character in
b_conout    equ	4*3		; Console character out
b_list	    equ	5*3		; List character out
b_punch	    equ	6*3		; Punch character out
b_reader    equ	7*3		; Reader character in
b_home	    equ	8*3		; Move head to home position
b_seldsk    equ	9*3		; Select disk
b_settrk    equ	10*3		; Set track number
b_setsec    equ	11*3		; Set sector number
b_setdma    equ	12*3		; Set dma address
b_read	    equ	13*3		; Read disk
b_write	    equ	14*3		; Write disk
b_listst    equ	15*3		; Return list status
b_sectran   equ	16*3		; Sector translate
b_ioinit    equ	17*3		; Initialize i/o system
b_time	    equ	18*3		; Return/set time
b_config    equ	19*3		; Return/set configuration
b_allocmem  equ	20*3		; Allocate memory to application
b_latchval  equ	21*3		; Return/set control latch values
b_dirio	    equ	22*3		; Direct disk i/o
b_filstruct equ 23*3		; Fill disk structure from disk information block
b_chario    equ	24*3		; Character stream i/o
b_bsxload   equ	25*3		; Banked system extension loader interface	 
b_dos	    equ	26*3		; Dos entry trap

; The following entries are available only in the "OS" memory bank, and
;	have no TPA equivalent

b_doio	equ	27*3		; Bank initiated i/o request
b_move	equ	28*3		; Move data from one memory map to another

; The following entries are entries to interupt service routines,  available
;	only in the "OS" memory bank, and should not be disturbed.

b_intfdd  equ	29*3		; Floppy disk interupt
b_inttim0  equ	30*3		; Timer 0 interupt
b_inttim1  equ	31*3		; Timer 1 interupt
b_intasci0 equ	32*3		; HD64180 ASCI 0 interupt
b_intasci1 equ	33*3		; HD64180 ASCI 1 interupt
b_intsbcen equ	34*3		; SB180 Centronics interupt
b_intets   equ	35*3		; ETS IO Plus interupt

; The following are status return constants for bios calls.

b_stat1    equ	1		; Status 1
b_stat2	   equ	2		; Status 2
b_stat10   equ	10		; Status 10
b_statff   equ	0FFh		; Status FF


os_index   equ	0		; OS bank index
tpa_index  equ	1		; TPA bank index

;
; Time buffer (b_time)
;

;	tmb_cy	(byte)	Real time clock year   (bcd)
;	tmb_cm	(byte)	Real time clock month  (bcd)
;	tmb_cd	(byte)	Real time clock day    (bcd)
;	tmb_ch	(byte)	Real time clock hour   (bcd)
;	tmb_cmn	(byte)	Real time clock minute (bcd)
;	tmb_cs	(byte)	Real time clock second (bcd)
;	tmb_cts	(byte)	Real time clock 1/10 s (bin)
;	tmb_chs (byte)	Real time clock 1/100s (bin)
;	tmb_dow	(byte)	Real time clock day of week
;	tmb_sy	(byte)	Save buffer year       (bcd)
;	tmb_sm	(byte)	Save buffer month      (bcd)
;	tmb_sd	(byte)	Save buffer day        (bcd)
;	tmb_sh	(byte)	Save buffer hour       (bcd)
;	tmb_smn	(byte)	Save buffer minute     (bcd)
;	tmb_ss	(byte)	Save buffer second     (bcd)
;	tmb_sts (byte)	Save buffer 1/10 sec   (bin)
;	tmb_shs (byte)	Save buffer 1/100sec   (bin)
tmb_cy	equ	0
tmb_cm	equ	1
tmb_cd	equ	2
tmb_ch	equ	3
tmb_cmn	equ	4
tmb_cs	equ	5
tmb_cts equ	6
tmb_chs equ	7
tmb_dow	equ	8
tmb_sy	equ	9
tmb_sm	equ	10
tmb_sd	equ	11
tmb_sh	equ	12
tmb_smn	equ	13
tmb_ss	equ	14
tmb_sts equ	15
tmb_shs equ	16
tmb_length equ	17


;
; System information entry (b_config)
;	Entry:	DE -> 128 byte buffer.
;		C = function code
;
; Function	Action					Buffer Definition
;
;   0		Return system version			---
;   1		Return system information		SIB
;   2		Set system parameters			Not yet defined
;   3		Return disk information (general)	DSG
;   4		Return disk information (specific)	DSS
;
b_cnfg_rvi equ	0
b_cnfg_rsi equ	1
b_cnfg_ssi equ	2
b_cnfg_dig equ	3
b_cnfg_rdi equ	4
;
;
; System Information Buffer				 (SIB)
sib_iotab  equ	0		; Io table
;sib_next:   equ	sib_iotab+iot_length

; I/O table
	; iot_syscfg1	(byte)	system configuration byte 1
	  ; iot_fx	(bit 7) SB180FX board
	  ; iot_ets	(bit 6) ETSIOPLUS board
	  ; iot_fxs	(bit 5) Use SB180FX SCSI address
	; iot_syscfg2	(byte)	system configuration byte 2
	; iot_hd0c	(byte)	asci ch0 configuration byte (stat)
	; iot_hd1c	(byte)	asci ch1 configuratioon byte (stat)
	; iot_cntla0	(byte)	asci control register a ch 0
	; iot_cntla1	(byte)	asci control register a ch 1
	; iot_cntlb0	(byte)	asci control register b ch 0
	; iot_cntlb1	(byte)	asci control register b ch 1
	; iot_stat0	(byte)	asci status register ch 0
	; iot_stat1	(byte)	asci status register ch 1
	; iot_dcntl	(byte)	dma/ wait control register
	; iot_rldr0	(word)	reload register timer 0
	; iot_etac	(byte)	ets ch a configuration byte (stat)
	; iot_mr1a	(byte)	mode register 1 for A
	; iot_mr2a	(byte)	mode register 2 for A
	; iot_csrba	(byte)	clock select register for A
	; iot_xba	(byte)	extended bit rate generator bit ch A
	  ; iot_xbrgrx	(bit 4) BRG for receiver
	  ; iot_xbrgtx	(bit 0) BRG for transmitter
	; iot_etbc	(byte)	ets ch b configuration byte (stat)
	; iot_mr1b	(byte)	mode register 1 for B
	; iot_mr2b	(byte)	mode register 2 for B
	; iot_csrbb	(byte)	clock select register for B
	; iot_xbb	(byte)	extended bit rate generator bit ch B
	; iot_ctur	(byte)	counter/timer upper register
	; iot_ctlr	(byte)	counter/timer lower register
	; iot_sbcc	(byte)	Centronics configuration byte (stat)
	; iot_rtc	(word)	real time clock module

iot_syscfg1 equ	0
iot_fx	    equ	10000000b
iot_ets	    equ	01000000b
iot_fxs	    equ	00100000b
iot_syscfg2 equ 1
iot_hd0c    equ	2
iot_hd1c    equ	3		
iot_cntla0  equ	4
iot_cntla1  equ	5
iot_cntlb0  equ	6
iot_cntlb1  equ	7
iot_stat0   equ	8
iot_stat1   equ	9
iot_dcntl   equ	10
iot_rldr0   equ	11
iot_etc     equ	0
iot_mr1     equ	1
iot_mr2     equ	2
iot_csrb    equ	3
iot_xb      equ	4
iot_xbrgrx  equ	00010000b
iot_xbrgtx  equ	00000001b
iot_etac    equ	13
iot_mr1a    equ	14
iot_mr2a    equ	15
iot_csrba   equ	16
iot_xba     equ	17
iot_etbc    equ	18
iot_mr1b    equ	19
iot_mr2b    equ	20
iot_csrbb   equ	21
iot_xbb     equ	22
iot_ctur    equ	23
iot_ctlr    equ	24
iot_sbcc    equ 25
iot_rtc	    equ	26
iot_length  equ	28

; Disk summary					(DSG)
				; Dsg_name	(byte)	name of disk (a - p)
				; Dsg_type	(byte)	type of disk (ftype,htype,mtype)
				; Dsg_dhbp	(word)	disk header block pointer

dsg_name equ	0
dsg_type equ	1
dsg_dhbp equ	2
dsg_length equ	4

; Disk specific 				(DSS)
				; Dss_disk	(byte)	disk number (0-15)
				; Dss_dt	(25 bytes) disk table entry
				; Dss_dp	(20 bytes) disk physical block
dss_disk equ	0
dss_dt	equ	1
dss_dp	equ	30

;
; Control structure for Direct I/O entry (b_dirio)
;
				; Dir_type	(byte)	type of disk (ftype,htype)
				; Dir_disk	(byte)	disk number (0-15)
				; Dir_status	(byte)	return status
				; 0 = command accepted
				; 1 = device type not same as selected device
				; Dir_cmdlen	(byte)	length of command (number of bytes)
				; Dir_comm	(10 bytes) device command
				; Dir_return	(10 bytes) device status
				; Dir_dma	(word)	dma address
				; Dir_dmal	(word)	dma length
				; Dir_dmar	(byte)	dma read (non-zero = read, 0 = write)
dir_type equ	0
dir_disk equ	1
dir_status equ	2
dir_cmdlen equ	3
dir_comm equ	4
dir_return equ	14
dir_dma	equ	24
dir_dmal equ	26
dir_dmar equ	28
dir_length equ	29

; Structure for character stream buffer

	; csb_dev	(byte)	cpm device index
	; csb_name	(4 byte) stream name (zero terminated)
csb_dev	   equ	0
csb_name   equ	1
csb_length equ	5
; CP/M device index values

cpm_conin  equ	1		; Console input
cpm_conout equ	2		; Console output
cpm_lst    equ	3		; List (LST:)
cpm_rdr    equ	4		; Reader (RDR:)
cpm_pun    equ	5		; Punch (PUN:)

; BSX entry structure

	; bsxh_entry	(JP)	Jump module main routine
	; bsxh_nxt	(JP)	Jump to next module in chain
	; bsxh_int	(word)	Offset to initialization routine
	;			After loading, this word contains length of module
	; bsxh_dnt	(word)	Offset to de-initialize routine
	; bsxh_id	(3 bytes) Id string "BSX"
	; bsxh_name	(string) Name of module (zero terminated)
bsxh_entry equ	0
bsxh_nxt   equ	3
bsxh_int   equ	6
bsxh_dnt   equ	8
bsxh_id	   equ	10
bsxh_name  equ	13

; Structure for bsx load
	; bsx_imga	(word)	image address
	; bsx_imgb	(byte)	image bank
	; bsx_lda	(word)	load address
	; bsx_ldb	(byte)	load bank
	; bsx_ldl	(word)	load length
	; bsx_name	(bytes) name of module (not used for all calls)
bsx_imga   equ	0
bsx_imgb   equ	2
bsx_lda	   equ	3
bsx_ldb	   equ	5
bsx_ldl	   equ	6
bsx_length equ	8		; Does not include name
bsx_name   equ	8

; Structure for DOIO

doi_dev	   equ	0
doi_trk	   equ	1
doi_sec	   equ	3
doi_nsec   equ	5
doi_dmab   equ	6
doi_dmaa   equ	7
doi_nm	   equ	9
doi_wt	   equ	10
doi_length equ	11

dois_io	   equ	1		; Bad I/O
dois_dsk   equ	2		; Bad disk number
dois_trk   equ	3		; Bad track number
dois_sec   equ	4		; Bad sector number
dois_dma   equ	5		; DMA address does not exist in bank
dois_bnk   equ	6		; Bad bank number
dois_eod   equ	7		; End of physical disk
dois_wp	   equ	8		; Write protected disk