ChanServ changed the topic of ##yamahasynths to: Channel dedicated to questions and discussion of Yamaha FM Synthesizer internals and corresponding REing. Discussion of synthesis methods similar to the Yamaha line of chips, Sound Blasters + clones, PCM chips like RF5C68, and CD theory of operation are also on-topic. Channel logs: https://freenode.irclog.whitequark.org/~h~yamahasynths
<cr1901_modern>
samlittlewood: Really cool SD2SNES work. Might actually motivate me to pick one up even if it costs more
<cr1901_modern>
(or FXPAK for the pedants)
<andlabs>
wait who makes the FXPAK Pro? does it have an official website?
<andlabs>
is samlittlewood krikzz?
<cr1901_modern>
krikzz makes super everdrive. Unrelated project
<cr1901_modern>
ikari makes fxpak. samlittlewood replaced the FPGA w/ something targeted by the open toolchains
<cr1901_modern>
The point of having the FPGA is so one can run SNES games w/ the coprocessors (except that Mahjong game that uses an ARM, since: 1. I don't think anyone wants to make a core for that, and 2.
<cr1901_modern>
ARM goes after ppl who make cores targeting non-26-bit ARM arch
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<Foone>
26 bit?
<cr1901_modern>
Foone: In the original ARM1/2, the program counter is 26-bits
<cr1901_modern>
the flags physically occupy the top 6 bits of the PC
<cr1901_modern>
There is an ARM FPGA called AMBER that only targets the 26-bit version of ARM; the company has not gone after that project AFAIK
<cr1901_modern>
(So much for sleeping)
<Foone>
ahh, fun. didn't know that!
<sorear>
it seems to mostly line up with the 20-year patent horizon
<cr1901_modern>
ARMv1/ARMv2*, sorry
<cr1901_modern>
Couldn't they have re-filed for some compat-mode BS? (The 26-bit mode is gone from like ARMv5 on)
<sorear>
so untidy. someday we'll have computers that simply turn into gas at the end of the warranty period
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* Sarayan
looks at Foone with puppy eyes
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<andlabs>
hey whitequark can glasgow be used to sniff pins on an IC? and if so, what components should I be using to build the sniffing part? I don't know if the IC is socketed or not
<andlabs>
but it is a DIP
<andlabs>
the IC shouldn't be running faster than 8Mhz
<Foone>
Sarayan: HI! I did try to test the floppy question, but had no luck. I need to build a better sort of harness to control more of the pins to get it working. The problem is that unless you're powering the enable/motor pins, it doesn't do anything at all
<andlabs>
devin/revenant says "get a logic analyzer + some wire clips :P"
<Sarayan>
Foone: interesting. What's the level when it's not powered?
<Sarayan>
I mean enable/motor that is
<Foone>
it's floating. which makes sense if you think about how there's two drives hooked up to the same wire. it's got to float so that one drive doesn't, uh, drive it when the computer is trying to check the other drive
<Sarayan>
It could have been pulled-up in open-collector fashion
<samlittlewood>
@cr1901_modern tyvm - it’s been an interesting project - background is that I have a couple of other projects that are similarish (ECP5 + level shifters and RAM) in unrelated areas, and this was a good way of climbing a marked route with some chance of sucess and getting a solid basst of SNES/SuperFX nostalgia.
<samlittlewood>
Once of the drawbacks of this is ‘quickly’ testing a game - then getting sucked in and spending the next 3/4 hour playing.
<samlittlewood>
(jeez - can’t keyboard - add letters to taste)
<samlittlewood>
It also has a larger FPGA (45K luts) than the fxpak pro, mainly to speed up p’n’r and fit integrated LA, the plan was to drop to a 12F on the same footprint (which is actually 25K LUTS) on the next rev - but i keep getting thoughts about putting other emulators in there.