! EDWIN driver for the BBC Macro (native mode) from Edwin include Device from Edwin include Icodes record format Point fm (integer x, y) const integer MAX IN BUF = 35 own integer BBC MODE = 2 ! Mode 0 = 640 x 256 @ 2 cols ! Mode 1 = 320 x 256 @ 4 cols ! Mode 2 = 160 x 256 @ 16 cols ! Screen information own integer SX = 0 own integer SY = 0 own integer XL = 0 own integer XR = 1279; !Right hand side of device window own integer YB = 0 own integer YT = 1023 own integer VIS = 0; !0 if CVP inside VW own integer OMODE = 0 { Overwrite mode own integer CCOL = 7 { White as Current Colour routine SWAP (integer name A, B) integer C C = A; A = B; B = C end routine COORDS (integer X, Y) TTPUT (X&255) TTPUT ((X>>8)&255) TTPUT (Y&255) TTPUT ((Y>>8)&255) end routine PLOT (integer COM, X, Y) TTPUT (25) TTPUT (COM) COORDS (X, Y) end routine DO COLOUR TTPUT (18) TTPUT (OMODE) CCol = 1 if BBC Mode = 0 and CCol > 1 TTPUT (CCOL) end external routine Set Mode alias "EDWIN_BBC_MODE" (integer MODE) BBC MODE = MODE & 7 end external routine BBC alias "EDWIN___B" (integer COM, X, Y) const integer array COLMAP (0:7) = 0 { black } , 7 { white } , 4 { blue } , 2 { green } , 1 { red } , 5 { magenta } , 3 { yellow } , 6 { cyan } own integer WX, WY, Nlines = 0, Lmode=0 record format Data Fm (record (point fm) p, record (Data Fm) name Next) own record (Data fm) name Point List == 0 own record (Data fm) name Next point == 0 switch SW (0:MAX COM) routine line (integer x1, y1, x2, y2) plot (4, x1, y1); plot (5, x2, y2) end routine triangle (integer x1, y1, x2, y2, x3, y3) PLOT (84, x1, y1) PLOT (84, x2, y2) PLOT (85, x3, y3) end include "Polyfill.abc" routine draw lines record (Data fm) name PP record (point fm) array pts (1:nlines+1) integer i return if Point List == Nil if nlines <= 1 start Line (point list_p_x, point list_p_y, point list_p_x, point list_p_y) else if nlines = 2 Line (point list_p_x, point list_p_y, point list_next_p_x, point list_next_p_y) else pp == point list for I = 1, 1, Nlines cycle pts(i) = pp_p pp == pp_next repeat nlines = nlines + 1 pts(nlines) = pts(1) POLY fill (nlines, Pts) finish nlines = 0 end routine FILL (integer xl, yb, xr, yt) SWAP (xl, xr) if xl > xr SWAP (yb, yt) if yb > yt xr = xr + 1 if xr = xl yt = yt + 1 if yt = yb TTPUT (24); COORDS (xl, yb); COORDS (xr, yt) TTPUT (18); TTPUT (OMODE); TTPUT (128 + CCOL) TTPUT (16) { Clear } DO COLOUR TTPUT (26) end routine circle(integer x, y, r) integer d, e, s, da, db, dda, ddb, odb, odda, oddb e = 1 s = 0 while e<r cycle e = e<<1 s = s+1 repeat d = e>>1 da = r<<s-d dda = r db = d ddb = 0 cycle odda = dda oddb = ddb cycle odb = db db = db+da>>s da = da-odb>>s dda = da>>s repeat until odda#dda ddb = db>>s line(x-ddb,y+odda,x+ddb,y+odda) fill(x-odda,y+oddb,x+odda,y+ddb) fill(x-odda,y-oddb,x+odda,y-ddb) line(x-ddb,y-odda,x+ddb,y-odda) repeat until db>=da end draw lines if nlines # 0 and (com = 10 or COM < 5) -> SW(COM) SW(0): ! Initialise ! Valid numbers are 16_BBC, 16_BBC0, 16_BBC1, 16_BBC2 BBC MODE = X & 15 BBC MODE = 0 unless 0<=BBC MODE<=2 Point List == New (point list) point List_next == Nil DEV DATA_NAME = "a BBC Micro" DEV DATA_DVX = 1279 DEV DATA_DVY = 1023 DEV DATA_MVX = 1279 DEV DATA_MVY = 1023 DEV DATA_MAX COLOUR = 7 TTPUT (22); TTPUT (BBC MODE) CCOL = 7 OMODE = 0 LMODE = 0 DO COLOUR return SW(1): ! Terminate TTPUT (22) TTPUT (3) FLUSH OUTPUT return SW(2): ! Update FLUSH OUTPUT return SW(3): ! Newframe TTPUT (22); TTPUT (BBC MODE) return SW(4): ! Move PLOT (COM, X, Y) SX = X; SY = Y return SW(5): ! Line if Lmode >= 0 start PLOT (COM+LMODE, X, Y) else if Nlines = 0 start point list_p_x = sx; point list_p_y = sy Next point == point list Nlines = 1 finish return if x=sx and y=sy Nlines = Nlines + 1 if Next point_next == Nil start Next point_next == New (Next point) Next point == Next point_next Next point_next == Nil else Next point == next point_next finish next point_p_x = x; next point_p_y = y finish SX = X; SY = Y return SW(6): ! Char ! Move to the bottom of the character by adding 32 to Y plot (4, sx, sy+32) ttput (5); ttput (x); ttput(4) sx = sx + 16 plot (4, sx, sy) return SW(7): ! Attribute if x=att colour start if 0<=Y<=7 start CCOL = COL MAP (Y) else CCOL = 7 finish DO COLOUR finish else if x=att line style start if y=1 start LMODE = 16 else LMODE = 0 finish finish else if x=att colour mode start ! y=0 => Replace ! y=1 => Or { EDWIN Uses 2 } ! y=2 => And { EDWIN Uses 1 } ! y=3 => Xor ! y=4 => Invert if 0<=y<=4 start if y=1 or y=2 start y = y !! 3 { swap 1 & 2 } finish OMODE = y else OMODE = 0 finish DO COLOUR finish return SW(8): ! Lower window bounds XL = X; YB = Y return SW(9): ! Upper window bounds XR = X; YT = Y return SW(10): ! Line modes if X=2 start { Point plot only } LMODE = 64 else if X=3 LMODE = -1 else LMODE = 0 finish return SW(11): ! Overwrite mode (old entry point) Y = X; X = att colour mode; -> sw(7) SW(12): ! Remember lower box bounds WX = X; WY = Y return SW(13): ! Upper box bounds & do the box SWAP (WX, X) if WX > X SWAP (WY, Y) if WY > Y return if WX > XR or X < XL or WY > YT or Y < YB WX = XL if WX < XL WY = YB if WY < YB X = XR if X > XR Y = YT if Y > YT ! Box now clipped into the screen. Fill (wx, wy, x, y) return SW(14): ! Circle circle (sx, sy, x) return SW(15): ! Area fill triangle (integer (y), integer (y+4), integer (y+8), integer (y+12), integer (y+16), integer (y+20)) if x=4 start triangle (integer (y+16), integer (y+20), integer (y+24), integer (y+28), integer (y), integer (y+4)) finish ! %for com = 1, 1, x*2 %cycle ! write (integer(y), 1) ! y = y + 4 ! %repeat ! newline SW(*): end !************************************************************************** ! The above bit is host independent, the following is for networked hosts, ! using the BBC as a terminal, and then follows the code for using the BBC ! when a 32016 processor is connected. ! !************************************************************************** ! ! REMOTE HOST SPECS: external routine Sample alias "EDWIN___B_SAM" (integer name i,x,y) signal 14, 8 end external routine Cursor alias "EDWIN___B_REQ" ( integername Char, X, Y ) signal 14, 8 end end of file !************************************************************************** ! ! 32016 SPECS: constant integer tkbyte = 6 routine osbyte {Call OB2 With R} ( integer Which, integer name X, Y ) * MovD _ Which, 1 * MovD _ 0(X), 2 * MovD _ 0(Y), 3 * Svc _ #TK Byte * MovZBD _ 2, 0(X) * MovZBD _ 3, 0(Y) end own integer char = 0 ! ! >> Try << ! ! Try and extract a character from the given buffer ! predicate Try ( integer Buff ) integer z ! zero for the keyboard * MovD _ # 16_91, 1 * MovD _ Buff, 2 {H}* MovQD _ #0, 3 * SVC _ # TK BYTE !H!* BCS _ No * MOVZBD _ 3, z char = z {H}false if Char = 0 Char = Char&127 if Buff # 0 true end external routine Sample alias "EDWIN___B_SAM" (integer name i,x,y) integer add on = 1 routine get cursor pos(integer name button,x,y) integer lr, ud integer function get channel(integer channel, integer name button) integer x, y = 0 osbyte(16_11,channel,y) ;! force conversion y = 0 cycle x = 0 osbyte(16_80,x,y) button = x if x # 0 ; ! record button press repeat until y # 0 ; ! a conversion has been completed if button & 2 # 0 start ; ! big fat button pressed cycle x = 0 osbyte(16_80,x,y) repeat until x = 0 finish osbyte(16_80,channel,y) ;! get the value from the ADC result = y ; ! ((y & 255) << 8) + channel end integer function do it(integer x,num) if num < 40 then result = x - add on result = x + add on if num > 130 result = x end lr = get channel(1,button) ud = get channel(2,button) if button & 1 = 1 start add on = 2 button = button !! 1 ;! get rid off the one without disturbing ;! anything else else add on = 30 finish ! ! work out what the numbers should do the x and y ! x = do it(x,(¬lr & 255)) y = do it(y,ud) end routine set up adc integer x = 2,y = 0 osbyte(16_10,x,y) ;! select two channels end set up adc get cursor pos(i,x,y) if try(0) then i = char end own integer joy stick = 0 external routine joystick present alias "EDWIN_BBC_JOYSTICK" ( integer joy) joy stick = joy if 0 <= joy <= 1 end external routine Cursor alias "EDWIN___B_REQ" ( integername Char, X, Y ) const byte array X Inc {offset by 1} ( 16_88: 16_8B ) = 0, 2, 1, 1 const byte array Y Inc {offset by 1} ( 16_88: 16_8B ) = 1, 1, 0, 2 integer Scaler integer new x, new y routine XOR Cursor const short array X Arm ( 1: 4 ) = -30, 30, 0, 0 const short array Y Arm ( 1: 4 ) = 0, 0, -30, 30 integer I for I = 1, 1, 4 cycle Plot(4,X,Y) Plot(1,X Arm(I),Y Arm(I)) repeat Flush Output end X = SX; Y = SY BBC (4, SX, SY) Flush OUTPUT TTPUT(18) ; TTPUT(3) ; TTPUT(7) { Set temporary colour } Xor Cursor if joy stick = 1 start new x = x ; new y = y finish cycle if joystick = 1 start char = 0 cursor(char,newx,newy) ! ! should do some form of polling the keyboard for input as well ! ! %if new x # x %or new y # y %start Xor Cursor new x = rem(new x + 1280,1280) ; new y = rem(new y + 1032,1032) x = new x ; y = new y Xor Cursor ! %finish finish if (joystick = 1 and char # 0) or joystick = 0 start ! if the joystick is being used, and either the second button ! has been pressed or there is a character in the keyboard buffer, ! or otherwise, the joystick is not being used, then START! Scaler = 2 CHAR = TTGET if joystick = 0 exit if Char <= 127 if 16_98+4 <= Char <= 16_9B+4 then Char = Char-4 if 16_98 <= Char <= 16_9B start Scaler = 15 ; Char = Char-16 finish if 16_88+4 <= Char <= 16_8B+4 then Char = Char-4 if 16_88 <= Char <= 16_8B start Xor Cursor X = X + (X Inc(Char) - 1)*Scaler Y = Y + (Y Inc(Char) - 1)*Scaler x = rem(x + 1280,1280) ; y = rem(y + 1032,1032) if joystick = 1 start new x = x new y = y finish Xor Cursor finish finish repeat Xor Cursor DO COLOUR SX =X ; SY = Y end end of file