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Trilotracker with an external SCC in DOS mode

by Mumbly on 30-12-2022, 17:29
Score: 172.54 %, Type: Forum topic , Comments: 9 comments
in page #8000-#BFFF than the page frame #4000-#7FFF call 0x138 ; get into A primary slot rrca rrca and 0x03 ; isolate slot for page #4000-#7FFF ld c,a ld b,0 ld hl,0xfcc1 ; get subslot flag (bit 7) for this primary slot add hl,bc or (hl) ; bit 0 ...

MSX-Music Hi-hat question

by Huey on 30-12-2022, 09:45
Score: 172.13 %, Type: Forum topic , Comments: 12 comments
AFAIK. I can confirm that registers I can confirm that registers 0x17, 0x18, 0x27 and 0 ...

Hardware accelerated polygon fill using LMMM

by Grauw on 29-12-2022, 02:10
Score: 172.21 %, Type: Forum topic , Comments: 8 comments
I give you this little demonstration: 100 COLOR 15,0,0:SCREEN 5 110 COLOR=(4,7,0,0):COLOR=(8,0,7,0):COLOR=(12,7,7,0) 120 P=0:SETPAGE P,1-P:CLS 130 FOR I=-31 TO 32 140 SETPAGE P,1-P 150 J=ABS(I)-16 160 LINE (64,74)-(191,137),0,BF 170 LINE (80+J,74)-(80-J,137),4,,XOR 180 LINE (159+J,74)-(159-J,137),4,,XOR 190 LINE ...

Parsing Command Structure?

by Chilly Willy on 28-12-2022, 22:23
Score: 172.06 %, Type: Forum topic , Comments: 11 comments
B, (HL) Compare A and B Then some routine after that to create a number between 0-255. Is ... C, A ; Put length in BC LD B, 0 INC DE ; Increment pointers ... Buffer DL = Table. Take first byte of table like Ld a, (de) ld c, a ld b, 0 So CPI ...

Scroll 1px problem, need your help

by Metalion on 26-12-2022, 21:14
Score: 172.09 %, Type: Forum topic , Comments: 8 comments
on the scroll direction. When going right, a new map is needed between +0 and +7. When going left, it's between +7 and +0. So I bluntly tested loading a new map at each step, but the problem is still there: ... on the scroll direction. When going right, a new map is needed between +0 and +7. When going left, it's ...

Intel hex file to binary to MSX memory

by jepmsx on 18-12-2022, 20:46
Score: 171.72 %, Type: Forum topic , Comments: 7 comments
the binary file is a .com file, when it is loaded in MSX-DOS it loads the binary file at 0x100 and start ... bytes the same as in a binary file? These are: byte 0+1: start-address byte 2+3: end-address byte ... bytes are the crt0 file linked by SDCC and I think it must be in another part in the ihx file ...

Screen 8 is offically screen9, what happend to 8?

by Accumulator on 18-12-2022, 19:38
Score: 171.75 %, Type: Forum topic , Comments: 24 comments
Ok, I was just browsing the manual of V9938 and was analysing mode register 0,1,8,9. I came ... at the graphical sites / mode bits M5 M4 and M3, ignoring M2, M1 from VDP1, so them on 0 Here it comes: The ... -> -2 > 7 > 1 1 1 (screen 8) screen 8 -> -2 > 7 > 1 1 0 (only ...

Hidden vector graphics (3D)

by BadWolf359 on 12-12-2022, 13:47
Score: 171.97 %, Type: Forum topic , Comments: 22 comments
Can anybody help me with the formula's (or method) of hidden vector graphics. By that I mean that you, for example, animate a cube, but you don't draw the vectors that shouldn't be visible. There can be tricks for that when you only ...

Game design decisions - limits on frames of animation

by megatron-uk on 12-12-2022, 12:22
Score: 171.32 %, Type: Forum topic , Comments: 4 comments
screen size. I would also use VRAM pages 0 and 1 as double buffer so animations are smoother. Similar can ... areas of 256x64 of VRAM pages 0/1 to store fonts and other GFX that always used during the game. ...

Switching RAM in page 2 from a ROM

by Metalion on 03-12-2022, 08:38
Score: 170.91 %, Type: Forum topic , Comments: 15 comments
on page 0, you can use the ENASLT routine (0024h). In pseudo code, it would look like this: A = ... Expanded slot (0 = no, 1 = yes) To my knowledge, there is no BIOS routine to directly retrieve the ID ... ; Mask only needed for page 0 sub = (SLTTBL + 2) ; Should be 0 is slot not extended slotId = prim | ...
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