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32 bit long to ascii

by ARTRAG on 10-04-2010, 00:24
Score: 113.43 %, Type: Forum topic , Comments: 16 comments
to decimal ; In: E:HL = 24-bit binary number (0-16777215) ; Out: DE:HL = 8 digit decimal form (packed BCD) ; ... being processed + 1 FIND1: ADD IX,IX RL C ; shift bit 23-0 from ... All bits 0: RES 0,L ; least significant bit not 1 after all .. ...

3D raycasting

by ARTRAG on 21-11-2011, 23:32
Score: 133.25 %, Type: Forum topic , Comments: 160 comments
Whereas a zoom out scaling by factor 2 would produce this 2 bytes result : F0 0F Is that correct ... by the rest of the code? So the loop would do nothing but store the byte out (0x98) (or whatever the port ... would produce this 2 bytes result : F0 0F Is that correct ? The scaling acts ...

50/60 Hz support for modern games

by ARTRAG on 10-01-2016, 15:38
Score: 140.25 %, Type: Forum topic , Comments: 54 comments
sparcles not regular but only sometimes, that was the jump from adjust 15 to adjust 0! An INDICATION ... to see if you were right 10 screen 8 20 set page 1,1 30 for i=0 to 255: line (i,0)-(i,211),i:next 40 set page 0,0 50 ' 60 copy (0,0)-(255,211),1 to (0,0),0 65 for j=0 to 100 70 for i=-7 to 8 80 set ...

5th sprite on mxs1

by ARTRAG on 30-04-2006, 16:45
Score: 108.58 %, Type: Forum topic , Comments: 5 comments
A very basic question I was expecting to read the "5th sprite flag" reading the location at 0xF3E7 and doing a bit 6 operation, my code (the compiler's one) is halt ld a,(F3E7) bit 06h,a jp nz,l70 [...] Using the debugger (in bluemsx) i find that A=9Fh independenty ...

64 sprites on screen

by ARTRAG on 09-11-2014, 00:17
Score: 127.55 %, Type: Forum topic , Comments: 1 comment
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; Interrupt service routine ; code @ 0x0038 push hl push de push bc push af _setVdp 5,0x36 ; SAT at 0x1b00 -> first sat, first 32 sprites _setVdp 7,0x0E ; 1st background color in a,(0x99) ; reset flags from previous interrupt ; do ...

64K rom - how to set to rom page 3 and set it back to ram

by ARTRAG on 13-06-2014, 16:37
Score: 126.34 %, Type: Forum topic , Comments: 85 comments
to ram? I need something similar to the routine setrompage0 from this excellent example from karoshi forum (that deals with page 0): ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; set pages and subslot ; ENASLT: equ 024h RSLREG: equ 0138h EXPTBL: equ 0FCC1h ; Bios ...

8-bit atan2

by ARTRAG on 15-05-2016, 22:48
Score: 139.48 %, Type: Forum topic , Comments: 24 comments
= y in -128,127 ; ; output ; A = angle in 0-255 ; | ; q1 | q0 ;------+------- ; q3 | q2 ; | atan2: ld de,0x8000 ld a,c add a,d rl e ; y- ld a,b add a,d rl e ; x- dec e jp z,q1 dec e jp z,q2 dec e jp z,q3 q0: ld ...

8253 timer on msxTR (in r800 mode)

by ARTRAG on 26-05-2013, 18:09
Score: 122.68 %, Type: Forum topic , Comments: 15 comments
? If not, could it be configured with a resolution of a fraction of 0.125ms and polled ... (sample_address_wave_2),HL ;carry = 0 8 ld bc,(sample_end_address_wave_2) 2 sbc hl,bc ;bc = end address of wav 2 jr ... wraps 1 add hl,de ;de' = fixpoint speed low 1 exx 1 adc hl,de ;de = fixpoint speed hi ;carry = 0 ...

A Doom engine in about 2000 lines of C

by ARTRAG on 30-05-2017, 23:38
Score: 138.78 %, Type: Forum topic , Comments: 31 comments
simple 2 line example: 10 DEFINT A-Y:COLOR 15,0,0:SCREEN 5 20 _TURBO ON 30 FOR I=0 TO 1500 40 Z=0:D=150+I 50 IF D<>0 THEN U=(I+Z)*140/D 60 LINE (U,U)-(255-U,U) 70 Z=-200:D=D+Z 80 IF D<>0 THEN U=(I+Z)*140/D 90 LINE (U,U)-(255-U,U),0 100 NEXT I ... now first thing to add would be skipping the line ...

A recurrent problem with bluemsx - Can this emulator hang windows XP?

by ARTRAG on 08-09-2007, 16:37
Score: 110.31 %, Type: Forum topic , Comments: 9 comments
0.6.3RC1 beta? I haven't got any reports how it runs under Win2k yet. MeitsNearDark: I have ...
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