[V9990] Q&A Official Thread

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By nitrofurano

Champion (287)

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03-09-2018, 21:53

well, i have to confess, from msxbasic not yet! Big smile - on OpenMSX i only have C-Bios machines available (due on a huge laziness on having classic machines available there as well! Big smile - i’ll do this asap, don’t worry! Big smile ) - what i was doing is trying to recode them to Boriel’s ZX-Basic, and compiling/trying from there


http://www.filedropper.com/example06a2tryingtoimprove

By nitrofurano

Champion (287)

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03-09-2018, 22:32

finally i fixed the linked directory issue i had (~/.openMSX/share/ wasn’t exactly a directory, was a broken file link to somewhere else, fixed it - that was why i only had C-Bios machines running here)

was it this one, @hit9918 ?

and where is it documented that lmmm is &h40, and where can we find which operand is lmmc and lmmv?

By hit9918

Prophet (2866)

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03-09-2018, 23:34

it is in yamaha_v9990.pdf on page 54
the values are 4 bit leftshifted vs the banzai table

By nitrofurano

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04-09-2018, 00:22

By nitrofurano

Champion (287)

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04-09-2018, 13:36

another question: where can we find the vdp registers values used on all gbasic screen modes (5 to 31, i guess), and all display modes mentioned at http://msxbanzai.tni.nl/v9990/manual.html#displaymodes ? (collaborative documentation like somewhere at etherpad counts as well)

for example, i tried screens 8, 10 and 12, which seems to use $82 in the register 6, and something different of $00 in the register 13, and they all look glitchy

By nitrofurano

Champion (287)

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04-09-2018, 22:00

i'm now really struggling on lmmc and lmmv... :S

about lmmc, this seems to do nothing, i wonder why...

nx=8:ny=8:sx=0:sy=0:dx=64:dy=64:ar=0:lo=0:op=$10:gosub 11000
for x=0 to 127
out &h62,&hFF
next

and about lmmv, i have no idea what to do at all...

By nitrofurano

Champion (287)

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05-09-2018, 10:34

an example of that etherpad link i suggested above: https://etherpad.net/p/v9990msx

By Manuel

Ascended (15691)

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05-09-2018, 11:25

You did read the GBasic Manual, right?

By nitrofurano

Champion (287)

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05-09-2018, 12:45

a bit of it, long time ago! Big smile (btw, do you have an online link of gbasic manual? please share, i can’t find from the usual search engines...)

By nitrofurano

Champion (287)

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05-09-2018, 12:43

(my struggle now is to write a simple msxbasic code that draws "lmmv" rectangles (or "line" lines) in random sizes, positions and colours - whatever help is hugely appreciated!)

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