DIY QubIDE Parts list

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axeman
ROM Dongle
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DIY QubIDE Parts list

Postby axeman » Sun Jun 23, 2019 11:14 pm

Hi,

I'm just getting the parts together for a diy QubIDE build. Can anyone provide the parts list from the Sellmyretro QubIde kit as I've sourced the same board. I've looked on http://hardware.speccy.org/temp/qubide-i.html but the resistor array size is ambiguous as is some of the capacitor and other resistor sizes.

Thanks

Tom


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Dave
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Re: DIY QubIDE Parts list

Postby Dave » Mon Jun 24, 2019 1:55 am

D1 is a BAT41
D2 is a 1N4148
Caps C3-C6 are 100nF, standard bead type
Two electrolytics by the 7805 are 10uF 2.54mm (.1") radial, 16v
RN1 is a bussed .1" SIL, 8 pin (7 resistors commoned together to the 8th pin) and provides a weak pull down. 3K3 sounds good.

3x GAL16V8 are DIP-20.
1x 74HCT688 is DIP-20
2x 74HCT646 are SOIC-24
The 512Kx8 SRAM is AS6C4008, though there are many pin compatible equivalents.


axeman
ROM Dongle
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Re: DIY QubIDE Parts list

Postby axeman » Mon Jun 24, 2019 1:57 pm

Brilliant! thanks Dave.

Can't wait to get his built.


axeman
ROM Dongle
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Re: DIY QubIDE Parts list

Postby axeman » Sat Oct 05, 2019 7:25 pm

Finally got my DIY QubIDE built however all I get is horizontal black and white bars on boot. QL is stock with no other cards. I've prog'd the Eprom with version 1.56A and removed the ram and 3rd gal to simplify. Also realised that you have to program the gal chips but not sure if I have the correct versions, sourced them from here http://www.retrocomputing.net/parts/sin ... s/docs.htm.

Anyone got any ideas?

My qubide exactly matches this
hpim3638b.jpg
Qubide with 512k RAM


Derek_Stewart
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Re: DIY QubIDE Parts list

Postby Derek_Stewart » Sat Oct 05, 2019 8:03 pm

Hi,

I have built alot of these interfaces, can you upload photo of both sides of the PCB.


Regards,

Derek
axeman
ROM Dongle
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Re: DIY QubIDE Parts list

Postby axeman » Sun Oct 06, 2019 5:43 pm

Hi,

Here are the photos

IMG_20191006_173803.jpg
Side1


IMG_20191006_173929.jpg
Side2


martyn_hill
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Re: DIY QubIDE Parts list

Postby martyn_hill » Sun Oct 06, 2019 8:25 pm

Hi Tom

Whilst there may be other problems (the programming of the GALs for one), it seems to me from your photo that the resistor array may be fitted back-to-front.

Pin 1 of the array is typically the 'common' pin and marked with the white 'dot', should be connected to Vcc and marked on the PCB adjacent to the ROM. If I read your photo properly, the white dot is on the left rather than the right (looking from the top-side.)

I may be completely wrong, of course - just a thought and easy enough to switch-around.

Good luck - I'll be assembling my own soon...

M.


axeman
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Re: DIY QubIDE Parts list

Postby axeman » Sun Oct 06, 2019 8:40 pm

Well spotted.

Will try in the morning

Many thanks M.


Derek_Stewart
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Re: DIY QubIDE Parts list

Postby Derek_Stewart » Sun Oct 06, 2019 9:28 pm

Hi,

I think Martyn is correct, the resistor array is the wrong way around. Pin 1 on the resistor array is next to the Qubide eprom.

If you look closely on the PCB mask, Pin 1 is marked.


Regards,

Derek
axeman
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Re: DIY QubIDE Parts list

Postby axeman » Mon Oct 07, 2019 9:21 am

Thanks so far guys but after replacing and orienting the resistor array correctly still getting black and white lines?

IMG_20191007_090536.jpg
qubide_noboot



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