sage
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Posts posted by sage
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>> I installed "RetroArch64" and found that shaken not stirred does not work with this emulator.
Can you please tell us which core you were using? Retroarch "contains" at least three different lynx cores.
And please file a issue in the tracker.
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Aside from emulators there is no (detailed) information on those available. At least none that I know of?
Chipper writes a list in its folder upon first start.
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I would prefer the gdb interface.
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suzy reads alway several bytes at once in its buffers, according to docs
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It seems as if the Lynx has a concept similar to the "Master Cycles" on a SNES.
So the Master clock is 16Mhz, and it seems some of the custom chips run off it from the "marketing" but then you could also says the C64's VIC-II runs at 8Mhz in the same way.
Is a tick 1 "clock/cycle" in normal CPU terms i.e a full hi + lo phase of the Phi2 clock, at 4Mhz.. or are they slightly faster ticks?
The RAM data sheet says its 120ns RAM so that is 220ns to do a read which gives a max CPU speed of 4.5Mhz but that takes 5 ticks, a Page look up then takes 120ns but that still takes 4 ticks.. However does Mikey/Suzy still need 4 ticks, or do they take advantage that the data grabs will mostly be on the same page, and grab data faster using the page timings. ( this is going to make self mode mod code even faster and more critical for speed on a Lynx)
Having the Page mode makes it impossible to do shared bus.. as you can't have the graphics chip access RAM which may need a completely different address and keep the Page mode. So I theorize that the blitter etc always eats cycles for every byte it has to read, no shared bus.. I think having a shared bus would be faster overall than this 'special' page logic..
I think we need a "Howard" and a Logic Analyzer
Is there a way to modify a "background colour" on the Lynx in real time, "work out raster time" inc dec some colour register, pen value? then you could make code that just inc dec inc dec and then see where the bars stretch. I don't have any hardware so I can't test such things.
yes
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we had the discussion already soem while ago. When it comes to emulation quality I think ...
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Correction: The Lynx model 1 dpoes not have BBR BBS RMB ... but Lynx Model 2 has it.
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I am still not sure that you win a lot. as there is only one counter reset, you cannot read one bank (sample from interrupt) while the other is loading sprites etc. I am not evn sure if there is a second counter.
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Great findings! There is so much new ideas, interleaved banks to speed up access. Keep offsets as zero to speed up loading files. And a single block loader.
That trick was already used in lynxer. you will find it in some of the old homebrew roms. but maybe by accident
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you can check my code which is "by accident" compatible to what lynxdir is wrinting to the roms
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I dont know how to make carts, sorry sage.
Thats not of importance. We just need someone to put his head on the line.
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I found a better description somewhere
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as far as I can tell, it should use a 16 bit mask to select the pixels from the sprite.
in Y it somehow seem to do something (but somehow only every second line), but it wont work for X, will stop after few columns.
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really everyhing?
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and you can use the epyx sound driver....
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the good old Duranik mod player of course. East up even more ram.
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Der luchs should release both. Just use DMs only to talk about so no one can get mad.
May I suggest that you do it yourself or shut up.
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Anyone played bit with algo3? Even so the EPXY doc says "algo 3 is broken"?
It seems that some circuits are left which work, but mainly for Y.
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stream the sound effects from rom. eats cpu, saves memoty
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hm. valid point. but it might be the source of the problem if I have multiple lynxes at one adapter (parallel upload, comlynx debugging).
the diode modification worded very well with my new usb adapters with 31250/62500baud.
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*rotfl*
bs42: the interface you sold me a zillion years ago uses a resistor between RX and TX
))) Time to change that -
I have to rework all the old hardware shit I think.
JUst queues nicely intoshacky power connector, shacky comlinx connectors, shacky cartridge connector ... the whole stuff is falling apart...
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Let me ask, did you include teh diode in you schematics on the flash card?
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You mean two Lynx'es w/o ComLynx-ing? While developing T-Tris, I did download the game to up to 4 Lynx in paralell w/o problem.
Regarding the diode: I found the hint in another forum. I tried an resistor but it did not work. Too bad, I cannot remenber the explaination ...
Not so much for the uploading.
PS: parallel upload to several lynxes never worked reliable for me.
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Handy emulator for Android
in Atari Lynx
Posted
PS: It runs fine with retroarch on my android phone.