; ATARI.S	Equate and macro file for atari ST	RMS
;		Extended and Improved: 8/11/88 - RJZ
;		Combined and Extended and Improved: 09/16/88 - RMS
;

save_rs:	EQU ^^RSCOUNT	;RS-Counter merken

; File header structure
		RSRESET
FILE_ID:	RS.W 1
TSIZE:		RS.L 1
DSIZE:		RS.L 1
BSIZE:		RS.L 1
SSIZE:		RS.L 1
XXX1:		RS.L 1
XXX2:		RS.L 1
XXX3:		RS.W 1
HEADSIZE:	EQU ^^RSCOUNT

; base page structure
		RSRESET
LOWTPA: 	RS.L 1
HITPA:		RS.L 1
TBASE:		RS.L 1
TLEN:		RS.L 1
DBASE:		RS.L 1
DLEN:		RS.L 1
BBASE:		RS.L 1
BLEN:		RS.L 1
DTA:		RS.L 1
PARENT: 	RS.L 1
XXXX:		RS.L 1
ENVIR:		RS.L 21
CMDLINE:	RS.B 128

; defines
TEXTSZ: 	EQU TLEN
DATASZ: 	EQU DLEN
BSSSZ:		EQU BLEN
BPSZ:		EQU ^^RSCOUNT
MYDTA:		EQU DTA
		RSSET save_rs	;RS-Counter wieder zurcksetzen

CR:		EQU $0D
LF:		EQU $0A
TAB:		EQU $09

****
****  This is a preliminary equates file for the Atari ST;
****  not all the equates may be here, there may be typos
****  we haven't caught, and not all the macros for Gemdos
****  and the BIOS have been defined.
****

;
; Atari ST hardware locations
;
memconf:	EQU $FFFF8001	;memory configuration
vbasehi:	EQU $FFFF8201
vbasemid:	EQU $FFFF8203	;Video base address
vcounthi:	EQU $FFFF8205
vcountmid:	EQU $FFFF8207
vcountlo:	EQU $FFFF8209	;Video display counter
syncmode:	EQU $FFFF820A	;video sync mode
vbaselo:	EQU $FFFF820D	;Video base address (lo; STE only)
linewid:	EQU $FFFF820F	;Width of a scan-line (Words, minus 1; STE only)
palette:	EQU $FFFF8240	;color registers 0..15
rezmode:	EQU $FFFF8260	;Resolution mode (0=320x200,1=640x200,2=640x400)
hscroll:	EQU $FFFF8265	;Horizontal scroll count (0..15; STE only)

diskctl:	EQU $FFFF8604	;disk controller data access
fifo:		EQU $FFFF8606	;DMA mode control
dmahi:		EQU $FFFF8609
dmamid: 	EQU $FFFF860B
dmalo:		EQU $FFFF860D	;DMA base address

cmdreg: 	EQU $80 	;1770/FIFO command register select
trkreg: 	EQU $82 	;1770/FIFO track register select
secreg: 	EQU $84 	;1770/FIFO sector register select
datareg:	EQU $86 	;1770/FIFO data register select

; GI ("psg") sound chip:
giselect:	EQU $FFFF8800	;(W) sound chip register select
giread: 	EQU $FFFF8800	;(R) sound chip read-data
giwrite:	EQU $FFFF8802	;(W) sound chip write-data
gitoneaf:	EQU 0		;channel A fine/coarse tune
gitoneac:	EQU 1
gitonebf:	EQU 2		;channel B
gitonebc:	EQU 3
gitonecf:	EQU 4		;channel C
gitonecc:	EQU 5
ginoise:	EQU 6		;noise generator control
gimixer:	EQU 7		;I/O control/volume control register
giaamp: 	EQU 8		;channel A, B, C amplitude
gibamp: 	EQU 9
gicamp: 	EQU $0A
gifienvlp:	EQU $0B 	;envelope period fine, coarse tune
gicrnvlp:	EQU $0C
giporta:	EQU $0E 	;GI register# for I/O port A
giportb:	EQU $0F 	;Centronics output register

; Bits in "giporta":
xrts:		EQU 8		;RTS output
dtr:		EQU $10 	;DTR output
strobe: 	EQU $20 	;Centronics strobe output
gpo:		EQU $40 	;"general purpose" output

; 68901 ("mfp") sticky chip:
mfp:		EQU $FFFFFA00	;mfp base
gpip:		EQU mfp+1	;general purpose I/O
aer:		EQU mfp+3	;active edge reg
ddr:		EQU mfp+5	;data direction reg
iera:		EQU mfp+7	;interrupt enable A & B
ierb:		EQU mfp+9
ipra:		EQU mfp+$0B	;interrupt pending A & B
iprb:		EQU mfp+$0D
isra:		EQU mfp+$0F	;interrupt inService A & B
isrb:		EQU mfp+$11
imra:		EQU mfp+$13	;interrupt mask A & B
imrb:		EQU mfp+$15
vr:		EQU mfp+$17	;interrupt vector base
tacr:		EQU mfp+$19	;timer A control
tbcr:		EQU mfp+$1B	;timer B control
tcdcr:		EQU mfp+$1D	;timer C & D control
tadr:		EQU mfp+$1F	;timer A data
tbdr:		EQU mfp+$21	;timer B data
tcdr:		EQU mfp+$23	;timer C data
tddr:		EQU mfp+$25	;timer D data
scr:		EQU mfp+$27	;sync char
ucr:		EQU mfp+$29	;USART control reg
rsr:		EQU mfp+$2B	;receiver status
tsr:		EQU mfp+$2D	;transmit status
udr:		EQU mfp+$2F	;USART data

; 6850 registers:
keyctl: 	EQU $FFFFFC00	;keyboard ACIA control
keybd:		EQU $FFFFFC02	;keyboard data
midictl:	EQU $FFFFFC04	;MIDI ACIA control
midi:		EQU $FFFFFC06	;MIDI data

; BIOS Variables
etv_timer:	EQU $0400	;vector for timer interrupt chain
etv_critic:	EQU $0404	;vector for critical error chain
etv_term:	EQU $0408	;vector for process terminate
etv_xtra:	EQU $040C	;5 reserved vectors
memvalid:	EQU $0420	;indicates system state on RESET
memcntlr:	EQU $0424	;mem controller config nibble
resvalid:	EQU $0426	;validates 'resvector'
resvector:	EQU $042A	;[RESET] bailout vector
phystop:	EQU $042E	;physical top of RAM
_membot:	EQU $0432	;bottom of available memory;
_memtop:	EQU $0436	;top of available memory;
memval2:	EQU $043A	;validates 'memcntlr' and 'memconf'
flock:		EQU $043E	;floppy disk/FIFO lock variable
seekrate:	EQU $0440	;default floppy seek rate
_timr_ms:	EQU $0442	;system timer calibration (in ms)
_fverify:	EQU $0444	;nonzero: verify on floppy write
_bootdev:	EQU $0446	;default boot device
palmode:	EQU $0448	;nonzero ==> PAL mode
defshiftmd:	EQU $044A	;default video rez (first byte)
sshiftmd:	EQU $044C	;shadow for 'shiftmd' register
_v_bas_ad:	EQU $044E	;pointer to base of screen memory
vblsem: 	EQU $0452	;semaphore to enforce mutex in vbl
nvbls:		EQU $0454	;number of deferred vectors
_vblqueue:	EQU $0456	;pointer to vector of deferred vfuncs
colorptr:	EQU $045A	;pointer to palette setup (or NULL)
screenpt:	EQU $045E	;pointer to screen base setup (|NULL)
_vbclock:	EQU $0462	;count of vblank interrupts
_frclock:	EQU $0466	;count of unblocked vblanks (not blocked by vblsem)
hdv_init:	EQU $046A	;hard disk initialization
swv_vec:	EQU $046E	;video change-resolution bailout
hdv_bpb:	EQU $0472	;disk "get BPB"
hdv_rw: 	EQU $0476	;disk read/write
hdv_boot:	EQU $047A	;disk "get boot sector"
hdv_mediach:	EQU $047E	;disk media change detect
_cmdload:	EQU $0482	;nonzero: load COMMAND.COM from boot
conterm:	EQU $0484	;console/vt52 bitSwitches (%%0..%%2)
trp14ret:	EQU $0486	;saved return addr for _trap14
criticret:	EQU $048A	;saved return addr for _critic
themd:		EQU $048E	;memory descriptor (MD)
_____md:	EQU $049E	;(more MD)
savptr: 	EQU $04A2	;pointer to register save area
_nflops:	EQU $04A6	;number of disks attached (0, 1+)
constate:	EQU $04A8	;state of conout() parser
save_row:	EQU $04AC	;saved row# for cursor X-Y addressing
sav_context:	EQU $04AE	;pointer to saved processor context
_bufl:		EQU $04B2	;two buffer-list headers
_hz_200:	EQU $04BA	;200hz raw system timer tick
_drvbits:	EQU $04C2	;bit vector of "live" block devices
_dskbufp:	EQU $04C6	;pointer to common disk buffer
_autopath:	EQU $04CA	;pointer to autoexec path (or NULL)
_vbl_list:	EQU $04CE	;initial _vblqueue (to $4ee)
_prt_cnt:	EQU $04EE	;screen-dump flag (non-zero abort screen dump)
_prtabt:	EQU $04F0	;printer abort flag
_sysbase:	EQU $04F2	;-> base of OS
_shell_p:	EQU $04F6	;-> global shell info
end_os: 	EQU $04FA	;-> end of OS memory usage
exec_os:	EQU $04FE	;-> address of shell to exec on startup
scr_dump:	EQU $0502	;-> screen dump code
prv_lsto:	EQU $0506	;-> _lstostat()
prv_lst:	EQU $050A	;-> _lstout()
prv_auxo:	EQU $050E	;-> _auxostat()
prv_aux:	EQU $0512	;-> _auxout()