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| MoeIcenowy | strange | 06:52 |
|---|---|---|
| MoeIcenowy | yosys optimized out my SB_HFOSC | 06:52 |
| MoeIcenowy | and then because clock is missing it optimized out the whole design | 06:53 |
| MoeIcenowy | oh I forgot to remove PLL locked signal from reset logic | 06:54 |
| MoeIcenowy | it's weird that Verilog allows wires to be used without definition | 06:54 |
| MoeIcenowy | oh HFOSC with CLKHF_DIV defined cannot be used by nextonr | 06:55 |
| MoeIcenowy | nextpnr * | 06:55 |
| MoeIcenowy | ERROR: expected configuration string starting with '0b' for parameter 'CLKHF_DIV' on cell 'hfosc_OSC' | 06:56 |
| MoeIcenowy | (I referred "iCE40 Oscillator Usage Guide" for configuration) | 06:56 |
| MoeIcenowy | I tried to change the value of CLKHF_DIV from 2'b10 to "0b10" | 06:58 |
| MoeIcenowy | it seems to work | 06:58 |
| MoeIcenowy | but is not following the Lattice guide | 06:58 |
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| tnt | MoeIcenowy: `default_nettype none | 08:51 |
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| corecode | MoeIcenowy: it is following exactly the lattice docs | 12:58 |
| MoeIcenowy | corecode: I don't think specify parameter as "0b10" correct | 13:47 |
| MoeIcenowy | the doc uses "Defparam OSCInst0.CLKHF_DIV = 2’b00;" | 13:48 |
| MoeIcenowy | When I specify it with #(.CLKHF_DIV(2'b10), the json specifies `"parameters": { "CLKHF_DIV": 2 }` | 13:51 |
| MoeIcenowy | when I use `#(.CLKHF_DIV("0b10"))` (which works now) | 13:51 |
| MoeIcenowy | `"parameters": { "CLKHF_DIV": "0b10" }` | 13:51 |
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| tnt | MoeIcenowy: lots of lattic IP actually use this weird 'number in string' notation. | 14:19 |
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| tnt | examples files in icecube 2 use it for HFOSC as well. | 14:21 |
| tnt | so does their own simulation model : https://pastebin.com/BByG28FZ | 14:21 |
| tpb | Title: //-------------------------------------- // ---- SB_HFOSC ------ //--------- - Pastebin.com (at pastebin.com) | 14:21 |
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| daveshah | Anyone who happens to be in the London area on 21st March, https://www.eventbrite.co.uk/e/fpga-hardware-and-tooling-past-present-and-future-open-source-sg-registration-58429565403 | 14:29 |
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| MoeIcenowy | tnt: so the document doesn't match iCECube2? | 15:31 |
| MoeIcenowy | now I can say Lattice is the worst FPGA vendor outside China that I have seen | 15:35 |
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| tnt | MoeIcenowy: well, it might just be that icecube2 accpets both format ... I didn't check. | 15:38 |
| emeb | tnt: did something silly last night - modified that up5k 6502 project by adding an old 8kB BASIC in ROM. Running ancient MS BASIC on an FPGA is kind of a hoot. | 15:40 |
| shapr | whoa cool | 15:46 |
| tnt | emeb: :) | 15:48 |
| tnt | you don't have a video out on your board ? | 15:48 |
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| emeb | tnt: not yet - I ordered some connectors yesterday though so it's in process. | 16:03 |
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| shapr | emeb: I want to see your ancient BASIC on FPGA | 16:42 |
| emeb | shapr: I can github it if you like | 16:46 |
| shapr | sure! | 16:47 |
| shapr | I don't have up5k, only ice40 chips hanging around | 16:48 |
| emeb | shouldn't be too hard to tweak it for others - just needs a few kB RAM and 12kB ROM. | 16:49 |
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| maikmerten | ice40 in hx8k flavor has 16 kB of BRAM | 16:59 |
| emeb | Should be fine. | 16:59 |
| maikmerten | so 12kB of ROM leaves 4kB for other stuff | 16:59 |
| emeb | it doesn't actually even need that 4kB of bootrom - that's just how I currently have it partitioned. only really needs 8kB for BASIC and another 512B or so for the startup & serial interface routines. | 17:00 |
| emeb | Wow - recently upgraded my Fedora system to F29 and now I can't compile nextpnr | 17:11 |
| emeb | seems that it's looking for Python 3.6 but F29 has 3.7 | 17:11 |
| emeb | probably something going on with the cmake cache. need to blow away and start from scratch I guess | 17:13 |
| emeb | that did it | 17:18 |
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| emeb | shapr: here's the github project w/ 6502 + MS BASIC -> https://github.com/emeb/up5k_basic | 17:37 |
| tpb | Title: GitHub - emeb/up5k_basic: A small 6502 system with MS BASIC in ROM (at github.com) | 17:37 |
| MoeIcenowy | but I think MS BASIC has copyright problem... | 18:02 |
| emeb | Of course it does | 18:03 |
| emeb | OTOH there are many other projects that reproduce various old ROMs and they don't have troubles. | 18:04 |
| emeb | and if anyone complains I'll remove the .hex file and provide instructions on how to recreate it. | 18:05 |
| emeb | And for what it's worth, MS did release the assembly source code for this old 6502 BASIC a few years ago so I suspect they're not too concerned about it any longer. | 18:07 |
| sorear | so when do we get https://github.com/Microsoft/MS-DOS/tree/master/v2.0 for BASIC | 18:07 |
| tpb | Title: MS-DOS/v2.0 at master · Microsoft/MS-DOS · GitHub (at github.com) | 18:07 |
| MoeIcenowy | emeb: are you sure it's official release? | 18:12 |
| MoeIcenowy | The MS-DOS 2.0 is a official release with open-source license | 18:13 |
| MoeIcenowy | oh the microsoft basic source is not official | 18:14 |
| tnt | It's on github.com/Microsoft ... | 18:16 |
| tnt | and they own github. | 18:16 |
| emeb | heh | 18:16 |
| tnt | oh nm, that link is not the basic | 18:16 |
| emeb | https://github.com/brajeshwar/Microsoft-BASIC-for-6502-Original-Source-Code-1978 | 18:17 |
| tpb | Title: GitHub - brajeshwar/Microsoft-BASIC-for-6502-Original-Source-Code-1978: This is the original 1978 source code of Microsoft BASIC for 6502 with all original comments, documentation and easter eggs. (at github.com) | 18:17 |
| emeb | been sitting there in full view for 4 years. | 18:17 |
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| MoeIcenowy | nobody cares it won't mean it's legal | 18:18 |
| MoeIcenowy | in US these source code can only get legalized at 2098 | 18:19 |
| MoeIcenowy | (can you live so long? ;-) | 18:20 |
| tnt | I'm not in the US :p | 18:20 |
| MoeIcenowy | then it will better | 18:20 |
| MoeIcenowy | at my country the copyright will expire at 2028 | 18:20 |
| MoeIcenowy | acceptable | 18:20 |
| emeb | As noted - if anyone complains I'll remove the hex file and include instructions on how to recreate it from all the other places where you can get it. | 18:21 |
| emeb | In the meantime - "For educational purposes only". | 18:21 |
| corecode | what system was MS BASIC for 6502 used in? | 18:21 |
| sorear | commodore pet | 18:21 |
| MoeIcenowy | many | 18:21 |
| corecode | so commodore basic is ms basic? | 18:22 |
| emeb | yes | 18:22 |
| MoeIcenowy | Commodore / Apple / some others | 18:22 |
| corecode | aha! | 18:22 |
| emeb | every mfg had their own customizations | 18:22 |
| emeb | special keywords, etc. | 18:22 |
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| emeb | but it all derived from the same code base | 18:22 |
| corecode | jesus assembler | 18:24 |
| emeb | copyright discussion added to the README.md file to cya | 18:30 |
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| sxpert | corecode: source code on github somewhere | 19:16 |
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| corecode | say what? | 19:44 |
| sxpert | corecode: https://github.com/mist64/c64rom | 19:50 |
| tpb | Title: GitHub - mist64/c64rom: Fully Commented Commodore 64 ROM Disassembly (at github.com) | 19:50 |
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