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Forum Index : Microcontroller and PC projects : new vga moan
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stanleyella Guru  Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
Hi. I finally decided to try picomite vga so built the vga 16 colour circuit. It did not display anything but teraterm works. This is v5,07,07,b1. I found a new vga manual and a much simpler circuit for 16 colour vga. No potentiometer or diodes. Bit late and no mention of 8 colour vga.  |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8566 |
Both versions work equally well if wired correctly and both are 16 colour. Does Teraterm say PicoMiteVGA in the title - if not you have loaded the wrong firmware Edited 2023-02-02 04:39 by matherp |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
> print mm.ver 5.070701 PicoMite MMBasic Version 5.07.07b1 Copyright 2011-2023 Geoff Graham Copyright 2016-2023 Peter Mather > I get error 413 files too large for photos now. Edited 2023-02-02 06:03 by stanleyella |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 5705 |
If it doesn't say VGA then you probably have the wrong firmware loaded. Both versions come in the same zip file. You might like to try a non-beta version to prove that everything is OK. https://geoffg.net/picomitevga.html The 4-resistor system works well, by the way, and produces 16 colours. There isn't an 8-colour mode. Edited 2023-02-02 06:13 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
PicoMiteVGA MMBasic Version 5.07.06 Copyright 2011-2023 Geoff Graham Copyright 2016-2023 Peter Mather > Thanks, me doh! still no vga. should it print something when powered? Sorry. my first try. I'll try the new 4 resistor circuit after testing my circuit again which checked out ok from the circuit in the old manual. what's 413 Request Entity Too Large when posting images less than 10M please? |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 5705 |
You won't get VGA until you put the resistor network on and connect it to a VGA monitor. There's no VGA signal over the USB connection - that's only for the console messages. Once you have VGA running you can redirect the console messages to the VGA display if you really want to. The VGA display is similar to a graphics display. Check the manual. I assume you're getting the 413 error from the forum? No idea what that is. Try making your pics smaller. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
Hi Mix. I am aware it's a vga signal although not pc vga, pretty cool for what it was intended and can see it from a minority hobbyist's view... it is retro but fun. It's also cheap with vga monitors dumped or in charity shops for £5. (I got an optiplex 64bit win unused and 22" hp monitor with dvi, mouse and kb all new for £10! in a cat charity shop) anyway my vga was duff vero/stripboard problem so why redo it when 4 resistors will do? I use vga sockets from graphic cards because they don't mount on vero/strip board but these got leads and plug sockets. I'll make another board/adaptor and see. Edit use bread board first, soldering is not fun. keyboard is tricky. ps2 sockets on vero, no it's wiring ie cut off ps2 plug and using logic level converter. If it works all I want is write reto games. Will more than 1 key work at once? regards stan Edited 2023-02-02 08:44 by stanleyella |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 1772 |
Colour is MODE 2. QVGA resolution 320 x 240 MODE 1 is Monochrome VGA 640 x 480 with the option of coloured tiles as per manual. |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
Cheers phil. my ili glcd is 16 colour 320x240 but spi so games won't be as fast as vga , I guess. looking forward to vga as an experiment. glcd support seems more practical imho. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 5705 |
See my latest PCB for a breadboard test rig that will handle both VGA and non-VGA PicoMite systems without having to dangle sockets in the wiring. :) There's also PicoGame if you want to use joysticks with a VGA system. In both cases the PCBs are very cheap from JLCPCB. I just paid the equivalent of 5.89UKP for five boards, including shipping on the slow boat from China. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 890 |
Hey Stan, Please check twice, if you have used the correct pins on the VGA socket.Maybe it is mirrored.  my first test attempt was simply a wired connection from a socket to a VGA socket left over from an old card with the resistors in the Cable.  ugly but done its job. Edited 2023-02-02 23:53 by Martin H. 'no comment |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
 Hi Martin. my vga was like yours but the lead went to vero that plugged into a breadboard with the 8 pins matching the 8 pins on the pico syncs,gnd,4 colours and gnd but the header lifted the vero copper and probably not worth fixing so I'll try the 4 resistor option.No diodes or 220r pot. I would have anyway if I'd known there was a new pico vga manual. My vga plug looks like yours and the resistors would fit inside. stan. I can post pictures in chrome but not opera anymore? Edited 2023-02-03 00:56 by stanleyella |
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| Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 890 |
your VGA connection is on the Wrong side.. turn the Pico 180° 'no comment |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
You are correct, it was just for a photo to get to post. It does align other side. The board has broken tracks due to insertion header pressure. Looking for the 4 resistors to make a new vga lead. Looking forward to seeing it working. cheers, stan |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
I fixed the broken vero strip, which was ground and I got a picture. Now the fun. Thanks all.  |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
How do I set up 320x240 16 colour mode please? Seems palette command is needed. Is it a command prompt command? I have looked. I need to cls rgb(white) and adjust the 220R pot for best white. Quite novel seeing the flashing cursor and drawing circles from teraterm and mmedit. Got keyboards and bi-directional logic level boards but do I need one other than a game pad? I use mmedit on win not the inbuilt picomite editor. edit-- I found I just type mode 2 in the command prompt, wow chunky, then cls rgb(white) but the pot does little, it looks white. Edited 2023-02-03 10:59 by stanleyella |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 5705 |
The pot only has a tiny effect on some displays. On others it's a bit more effective, I believe. The PicoGAME info shows how to connect various joysticks and a game pad. How you edit your programs is up to you. :) In some cases it depends on whether you have enough room for two monitors or on whether you are driven mad because your monitor takes ages to re-synch. Personally, I'm quite happy to use Mode 1 and the internal editor most of the time. It's a more immersive old-time computing experience - especially if you set the default colours to green on black. :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
I tried  using mmedit and noticed only primary colours get capitalised. The monitor only showed 14 boxes but after head scratching I pressed a button on the display marked "auto" and it displayed 16 boxes. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 5705 |
The capitalisation isn't a function of MMBasic AFAIK. Have you tested to see how it looks in the built-in editor? Looks like your monitor hadn't synched properly at that resolution. Edited 2023-02-04 01:53 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1639 |
I type edit in teraterm and got this and on the vga display. The inbuilt editor is amazing but I'm too lazy to learn it and mmedit is like gcbasic and picaxe editors on win.  |
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