Search found 133 matches

by aotta
Tue Apr 09, 2019 8:32 pm
Forum: hardware
Topic: RPC600 and weird colours at boot
Replies: 0
Views: 104

RPC600 and weird colours at boot

I am new with RiscPC and Riscos over 3.11, and maybe it's some silly error by myself, but after a few days working on the RP600 i bought from a stardot's user, i got wrong colours at boot, and the right one's only after an "apply" to the same screen: at boot: bootcolor.jpg after change screen (eithe...
by aotta
Sat Mar 23, 2019 12:25 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29523

Re: RGB to HDMI using a Pi Zero and a small CPLD

the photo was taken after some soldering pass on the xl9572 and there was a bridge, but it's not that the failure. I found that the pins that go short are the two connected to C5, but only after a few seconds the boad is powered! Then, after cooled and disconnected, the shorts disappear... May be th...
by aotta
Fri Mar 22, 2019 10:30 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29523

Re: RGB to HDMI using a Pi Zero and a small CPLD

Thank you Dave for the support.. that's a pic of board (with burned xc9572xl): do you notice some mistakes?
RGB2HDMI.jpg
by aotta
Fri Mar 22, 2019 9:47 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29523

Re: RGB to HDMI using a Pi Zero and a small CPLD

Waiting new soldering tip, made new try and burned another xilinx... but some progress this time! i flashed the cpld and seen an acorn bbc on screen and the menu on screen for a few second, before smoke started! :roll: :lol: But I have a question about link p6, i didn't find the explanation on the w...
by aotta
Thu Mar 21, 2019 1:38 pm
Forum: for sale / freebies
Topic: Want: BBC Master 128 motherboard
Replies: 5
Views: 263

Re: Want: BBC Master 128 motherboard

Kazzie wrote:
Wed Mar 20, 2019 12:20 pm

Undead floating motherboards... sounds like something from the horror section of Blockbuster! :P
:lol: :lol: :lol:
by aotta
Wed Mar 20, 2019 10:06 pm
Forum: for sale / freebies
Topic: Declutter Sale - RiscPC ***SOLD ***
Replies: 15
Views: 1066

Re: Declutter Sale - RiscPC

pm (re)sent... really strange, i was sure to posted to you... is perhapsh your box full?
anyway, i am still interested!
by aotta
Mon Mar 18, 2019 6:47 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29523

Re: RGB to HDMI using a Pi Zero and a small CPLD

hoglet wrote:
Sun Mar 17, 2019 7:02 pm

The correct soldering iron bit looks like this:
__1.jpg

It's huge compared to the pins, but that doesn't matter. Don't try to solder each pin individually. And don't use a fine pointed bit.

Dave
Ordered a soldering spade tip.. Thank you!
by aotta
Mon Mar 18, 2019 6:42 am
Forum: for sale / freebies
Topic: Declutter Sale - RiscPC ***SOLD ***
Replies: 15
Views: 1066

Re: Declutter Sale - RiscPC

If shadows decline... Pm sent!
by aotta
Sun Mar 17, 2019 6:07 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29523

Re: RGB to HDMI using a Pi Zero and a small CPLD

Do you mean you damaged it trying to solder it in? Or there were shorts that destroyed it? Maybe posting a photo would help us understand and offer better advice. I probably made some short in soldering, and burned IC (literaly... with red lamps and smoke!) when power on the BBC and flashing with x...
by aotta
Sun Mar 17, 2019 1:12 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 677
Views: 29523

Re: RGB to HDMI using a Pi Zero and a small CPLD

i just burned my third xl9572.. i ordered new one but i am afraid my soldering iron isn't small enough for this little smd ics.. is some RGBtoHDMI board for selling somewhere?
by aotta
Fri Mar 15, 2019 12:48 pm
Forum: for sale / freebies
Topic: Declutter Sale - RiscPC ***SOLD ***
Replies: 15
Views: 1066

Re: Declutter Sale - RiscPC

Interested, but I am afraid I am late...
If pc is sold, please update the thread
by aotta
Fri Mar 08, 2019 6:26 pm
Forum: for sale / freebies
Topic: VideoNuLA boards
Replies: 71
Views: 11989

Re: VideoNuLA boards

RobC wrote:
Fri Mar 08, 2019 6:07 pm
..so, as long as I don't get too distracted by the Doom port....
Doom port?? your magic hat is bottomless! :lol:
by aotta
Mon Feb 18, 2019 7:10 pm
Forum: hardware
Topic: Amstrad CPC464 emulator
Replies: 15
Views: 724

Re: Amstrad CPC464 emulator

just tested... bravissimo Rob!
by aotta
Thu Jan 31, 2019 9:12 am
Forum: hardware
Topic: Making a digital joystick for the beeb
Replies: 26
Views: 3116

Re: Making a digital joystick for the beeb

Sorry to keep going on! On a beeb joystick, the fire button only connects to 0v so for a two button stick you only need: 1.8v, ch0, ch1, 0v, fb0 and fb1. I don't know the joystick you are talking about, so it might want 5v for something else or I could just be completely wrong! I'm pretty sure on m...
by aotta
Wed Jan 30, 2019 11:02 pm
Forum: hardware
Topic: Making a digital joystick for the beeb
Replies: 26
Views: 3116

Re: Making a digital joystick for the beeb

It was i thought... Then tried the schematics found in the old article posted above, and added the resistor... You are surely right, anyway my mod now works too

And, i had only 6 wires in the voltmace cable... And 5v is needed for fire buttons (I don't know if 1.8v is enough for pullling button..)
by aotta
Wed Jan 30, 2019 9:25 pm
Forum: hardware
Topic: Making a digital joystick for the beeb
Replies: 26
Views: 3116

Re: Making a digital joystick for the beeb

resuming this old but interesting thread to give my little hints to who want to adapt an analogic joystick for his beeb: bought (by mistake, i had to admit... :) ) a Voltmace 3a for "commodore", i tested with my c64 and didn't work well so... i found this thread and added the 5v line to the potentio...
by aotta
Mon Jan 07, 2019 4:54 pm
Forum: hardware
Topic: MMC hard drive emulation?
Replies: 301
Views: 19953

Re: MMC hard drive emulation?

sorry for popping-up and old thread, but i wonder if is there a way to use the ADFS157 modded for SD card with the IDE drive too.. i mean a way to choose if mounting SDcard ADFS partition, or real IDE ones, or togheter, one in drive 0 and one in drive 1, to make possible backup files on HD.. impossi...
by aotta
Wed Nov 28, 2018 6:26 am
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

I'm just happy that you got them both working. How many PCB's did you get made, are you going to populate them and sell any? I've a A3000, a A4000 and a A5000, so i made two 8 bit and one 16 bit boards. I had to order 10 PCBs for each version, so I had some left and maybe l'll populate one or two m...
by aotta
Tue Nov 27, 2018 10:58 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

The front HD LED is wired into the internal IDE port, so it would be difficult to make it flash for the podule access. You could wire up the front power LED to the podule, then depending on the which way round you connect the wires, the LED will be on or off when the drive is accessed. So you could...
by aotta
Tue Nov 27, 2018 9:26 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

Found the bug! and was wery small... a drill on the pcb in the D2 line from ROM and GAL was scrapy.. and line interrupted! a wire solved and podule start! now trying to use hform on CF card without formatting my IDE Discs... :lol: Run hform from floppy, and disconnect the IDE connected to the on-bo...
by aotta
Tue Nov 27, 2018 6:29 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

it seems the 3rd bit (4) is always set.. :wink: Yep, time to check your soldering. Yes, great idea give a look in memory! Many thanks again! Found the bug! and was wery small... a drill on the pcb in the D2 line from ROM and GAL was scrapy.. and line interrupted! a wire solved and podule start! now...
by aotta
Tue Nov 27, 2018 12:32 am
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

IanS wrote:
Tue Nov 27, 2018 12:28 am
aotta wrote:
Tue Nov 27, 2018 12:14 am
it seems the 3rd bit (4) is always set.. :wink:
Yep, time to check your soldering.
Yes, great idea give a look in memory! Many thanks again!
by aotta
Tue Nov 27, 2018 12:14 am
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

mmhh.. a lot of difference, in fact:
debug.jpg
it seems the 3rd bit (4) is always set.. :wink:
by aotta
Mon Nov 26, 2018 10:45 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

IanS wrote:
Mon Nov 26, 2018 10:40 pm

Try this for the GAL.
IDE_Podule.zip
Thank you, but no difference... always same exception.

I will recheck all solders tomorrow and made further test.. :(
by aotta
Mon Nov 26, 2018 10:33 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

too beauty to be real... finished assembling 16bit board, installed on the A5000 and: - with ide (cf or real hd) connected, hangs on purple screen; - without ide connected, it boot but at *podules command i get: "internal error: address exception at &0382601c", with all four combination of jp1 & jp...
by aotta
Mon Nov 26, 2018 9:52 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

too beauty to be real... finished assembling 16bit board, installed on the A5000 and: - with ide (cf or real hd) connected, hangs on purple screen; - without ide connected, it boot but at *podules command i get: "internal error: address exception at &0382601c", with all four combination of jp1 & jp2...
by aotta
Sun Nov 25, 2018 11:16 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

Thank you IanS for all info! I need it for my a5000 (finally I made a working ones) and I will use a CF card, so I"ll solder a simple wire or a 0R resistor, and left jumper (and led) as already done.
Thank you again!
by aotta
Sun Nov 25, 2018 10:43 pm
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 83
Views: 4362

Re: IDE interfaces - hardware details

i am working on 16bit podule version, i am missing only soldering resistors but i need some help for their values (for r8 to r31 ones) and i am not sure about j1 and jp3 role..
Ide16.jpg
may be give me a little help IanS?
by aotta
Thu Nov 15, 2018 6:34 am
Forum: hardware
Topic: Model B PSU fuse go bang.
Replies: 17
Views: 651

Re: Model B PSU fuse go bang.

I exploded 2 fuse while recapping micro psu in the last weeks, and in both cases it was because residual fluxing paste take a short circuit between 2 tracks (the gap between tracks near the 2 paper caps are very thin, and ac 220v is not like low voltage dc). I clean pcb with IPA, mounted new fuse an...
by aotta
Thu Nov 15, 2018 6:14 am
Forum: hardware
Topic: SpectROM - Speccy emulator for the Pi co-pro
Replies: 182
Views: 10639

Re: SpectROM - Speccy emulator for the Pi co-pro

Best wishes to your mother, and happy you are getting something new about vnula from your magic hat!