DIY QubIDE Parts list

[axeman]

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

[Dave]

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]

Brilliant! thanks Dave.

Can't wait to get his built.

[axeman]

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

Qubide with 512k RAM

[Derek_Stewart]

Hi,

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

[axeman]

Hi,

Here are the photos

Side1

Side2

[martyn_hill]

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]

Well spotted.

Will try in the morning

Many thanks M.

[Derek_Stewart]

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.

[axeman]

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

qubide_noboot