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Hello world on V9990

by Metalion on 30-12-2019, 16:04
Score: 153.63 %, Type: Forum topic , Comments: 12 comments
of pattern 0) But nothing appears on screen (and I mean nothing). I've checked the VRAM at 7C000h/7C001h, and it's already 0, so it should display pattern 0. Maybe I have to set the palette ? ... 00000101b ; 6 Screen mode (nu: p1) byte 0 ; 7 byte 128+2 ; 8 Control byte 1 ...

OpenMSX debugger ?

by Metalion on 04-01-2021, 11:43
Score: 155.91 %, Type: Forum topic , Comments: 15 comments
to make do with F10 openMSX command line terminal. Happy 2020 msx-ing! Debugger is working fine ...

Outrun style road demo MSX2

by Metalion on 28-11-2019, 19:03
Score: 161.13 %, Type: Forum topic , Comments: 257 comments
an idea): OTIR_UNROLL: LD A, B AND A, #0F ADD A LD DE, OTIR_LOOP ADD E LD E, A LD A, 0 ADC D LD D, A PUSH DE LD A, B AND #F0 LD B, A RET ; jumps to OTIR_LOOP + 2 * (B AND #0 ... fix known bugs https://www.youtube.com/watch?v=JwtjCHK0qns Oh wow, looking very ...

BLOAD not working

by Metalion on 16-11-2019, 13:18
Score: 152.71 %, Type: Forum topic , Comments: 2 comments
that nothing has been loaded. What does happen ? PS : The file header is FE,00,A0,7F,E5,42,A0 ...

LINE VDP command speed

by Metalion on 28-08-2019, 16:30
Score: 158.88 %, Type: Forum topic , Comments: 8 comments
Hi everyone, We all know the speed measurements done by Grauw on several VDP commands (HMMV, LMMV, ...). But so far, I have not found any measurement of the LINE command speed. Does someone have information on this ? Ideally, I'd like ...

Changing registers during VDP LMMV command

by Metalion on 21-08-2019, 16:41
Score: 151.55 %, Type: Forum topic , Comments: 8 comments
Hi everyone, I'm toying with the LMMV command, changing registers while it's being executed. I'm doing my tests on OpenMSX (but made some preliminary tests on real hardware). I've calculated as best as I could the time ...

Y coordinate 217 for sprite mode 2

by Metalion on 28-01-2019, 19:27
Score: 147.75 %, Type: Forum topic , Comments: 13 comments
to the foreground colour. The vertical location of the sprite is set to 209 (mode 0 to 3) or 217 (mode 4 ... feature. I dont know 100% but these 2 things fit the symptoms. using a color of 0 or parking ... 2-11. says something about "lines 0 to 192". maybe 5th sprite is not set outside those ...

TIMP transfer with non black color zero

by Metalion on 14-01-2019, 10:42
Score: 147.64 %, Type: Forum topic , Comments: 4 comments
transfer won't do, since with that operator : if SC=0 then DC=DC else DC=SC I thought ... color (since any color AND 0 would result in 0), and the second TIMP command would transfer the rest ... and a background color '0' for the TIMP transfer (for the same reason). I do not have the space ...
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