#51

ISSUE #51 - April 6, 2008 SPAG (The Society for the Promotion of Adventure Games) Edited by Jimmy Maher April 6, 2008 SPAG #51 is copyright (c) 2008 by Jimmy Maher. Authors of reviews and articles retain the rights to their contributions. All email addresses ...

... st Bit 0 and it is zero then we are not free to receive data; similarly if we test Bit 1 and it is zero then we are not free to transmit data. For example, here is a piece of assembler code to send 512 bytes to the DSP (taken from the XBIOS): MOVE.W #512-1,D0 ; d0 = our counter Lab08: BTST #1,$FFFFA202.W ; ready to transmit? BEQ.S Lab08 ; bit 1 = 0? Not ready MOVE.B (A0)+,$FFFFA205.W ; send hi byte MOVE.B (A0)+,$FFFFA206.W ; send mid byte MOVE.B (A0)+,$FFFFA207.W ; send lo byte DBF D0,Lab08 ; loop ...

... rroring stuff, but I'm not sure. Furthermore I warn you: The code is very messy (sorry Seboz). ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ :listing 2: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sin_gen: lea sin,A0 moveq #0,D6 lea 512*2+4(A0),A1 movea.l A0,A2 moveq #512/4-1,D7 sin_gen1: lea sin_fakdiv+16,A3 move.l D6,D5 moveq #7,D2 sin_gen2: move.w D2,D1 move.l D6,D3 sin_gen3: mulu.l D6,D4:D3 rol.l #8,D3 rol.l #8,D4 move.b D3,D4 move.l D4,D3 dbra D1,sin_gen3 divs.l -(A3),D3 add.l D3,D5 subq.w #2,D2 bcc.s sin_g ...

... * useful when doing things like "twiddle factors" with FFTs. Interestingly(?), if we consider a setting where Nn = 1024, using reverse carry repeatedly with the following code: move #output_buffer,r1 move #0,r0 move #0,m0 ; select reverse-carry move #512,n0 ; our reverse carry "increment" do #100,rc_loop move r0,x:(r1)+ lua (r0)+n0,r0 nop ; wait for pipeline rc_loop: ... produces the following sequence: 0, 512, 256, 768, 128, 640 ... or in binary: 000000000 100000000 010000000 110000000 001000000 1 ...

... iculture should get out to public schools and other educational institutions. Beekeepers have now joined the ranks of other occupations described by leaflets published by Chronicle Guidance Publications. Beekeepers is the title of a four-page brief (#518) from Chronicle. It provides an overview of what beekeepers are and a description of the work involved. These handouts and are made available to a number of places, including public schools, community colleges, employment agencies and libraries. If ...

... an advantage every time. Further on in the magazine is a short text written by Bruce prior to the release of his book. It deals with the Steve Jackson Games raid and lawsuit. For further reading on this topic, please see Computer Underground Digests #510-516. In closing, I highly recommend reading this book, if only for the entertainment value. It isn't a 'how to' handbook for the would be 'hacker', it's a fair and unbiased account of the happenings during the arrests made a ...

... to do his thing. I wandered outside to find a better place. A car pulled up and a woman got out, undressed and went to the bathroom right there in public, on the side of the road. Europeans are much less reserved than us, I think to myself. (960813) #513 BR EATING [A most common, basic and essential waking life activity, eating has to do with nutrition, maintenance, and growth. It is a source of pleasure and usually involves a social interaction setting. BK] *** Dream: Lunch and a Mugging by Nutcra ...

... B-&Q<4>E#?57R'/$M1@&HBL'+"XKJDP?*9%B$6^OEB&%:-(%THH. MZD*QG0','YB9N#!\'A'4Y2>S8D-$'-(7:YD7,]I;+5=-K<%%WPR'H6I%8#5U MK*6?4[1O!/6-G^Y:K09?%/7B(HK^^%M4>8NV]ES1NI'/V,6*J-AJ$',U8V$J M=,WP=BWLQ.HN:R]@[<06B])I<HXG.LE5;"![)&"G#51SZ6SOI";5NBL@.Z%Q MC`XJ0YJ9.K#0'YCHKK65D+J.0<%HZP@&203J[L(I\CU5NB?C#$80DF8VBJ)- METJ)2T==,^IXPDDE\W5+UEY;-/:-Z;ZW9:2FJX#=M#=4EQ#$/@VS=BVB3&R\ M#@EX.\)RO(@)F^W0@1>I7J`+CG2"S7^'0>L]%>F%W8"MUJTL.=['MO4ES'2B M*#FP+:YVP@-]""&]A`<"D&@H19!N@ ...

... structions to copy MOVE.W #39,D0 ; Generate the code GENMOVE1: MOVE.L (A1),(A2)+ ; Copys 40 of - MOVE.W (A0)+,(A1)+ DBF D0,GENMOVE1 ; and MOVE.W (A2)+,(A1)+ ADDQ.L #4,A1 MOVE.W (A1),(A2)+ ; Move the RTS MOVE.L A2,D0 ; A2 = start of free memory ADD.L #512,D0 ; Force it to a 512 byte boundry AND.L #$FFFFFE00,D0 MOVE.L D0,$044E(A5) ; And that is the monochrome screen MOVE.L D0,MONO ; Set MONO MOVE.W #$0001,-(SP) ; Hardware to medium MOVE.L #-1,-(SP) MOVE.L #-1,-(SP) MOVE.W #5,-(SP) TRAP #14 ; Set medi ...

... a1) ADD.L #160,A1 DBF D0,FONTYDRAW3 move.w #7,d0 FONTYDRAW3b MOVE.W (A0)+,(a1) move.w (a0)+,8(a1) ADD.L #160,A1 DBF D0,FONTYDRAW3b MOVE.W #28,D0 MOVE.L FONTTYPE,A0 CLR.L D6 MOVE.B (A6)+,D6 SUB.B #32,D6 MULU #144,D6 ADD.L D6,A0 MOVE.L SCREEN,A1 add.l #5152,a1 FONTYDRAW4 MOVE.W (A0)+,D5 ADD.W D5,(A1) move.w (a0)+,8(a1) ADD.L #160,A1 DBF D0,FONTYDRAW4 move.w #7,d0 FONTYDRAW4b MOVE.W (A0)+,(a1) move.w (a0)+,8(a1) ADD.L #160,A1 DBF D0,FONTYDRAW4b MOVE.W #28,D0 MOVE.L FONTTYPE,A0 CLR.L D6 MOVE.B (A6)+,D6 ...