OSI 600D Superboard Build

[rubber_jonnie]

Well, the rest of the RAM is at my local depot ready for delivery today, I can only hope that the 74LS93 arrives today too, otherwise no amount of RAM will have it booting!!

[stephen_usher]

[rubber_jonnie]

Dammit. 20 RAM ICs in the post, but no LS93...

Though the shift lock 'bodge' switch arrived and looks happy in it's new home:

PXL_20240122_111549247.jpg (197.73 KiB) Viewed 822 times

The problem is that actual latching shift lock keys are pretty expensive and Klyball over at OSIWeb, who changed the switches on the PCB, added this a workaround. If I can get the correct switch, it'll be going in.

[HigashiJun]

Are the resistors going under the SHIFT key ?

[rubber_jonnie]

Are the resistors going under the SHIFT key ?

They are, but they are no taller than the switch body so don't interfere.

[HigashiJun]

They are, but they are no taller than the switch body so don't interfere.

Quite odd design, but at least they don't interfere.

[rubber_jonnie]

They are, but they are no taller than the switch body so don't interfere.

Quite odd design, but at least they don't interfere.

Yeah, you'd think they'd be flush like the diodes, but for some reason they aren't.

Here it is close up with the key up:

PXL_20240123_125012175.jpg (147.61 KiB) Viewed 772 times

And down:

PXL_20240123_125015013.jpg (144.83 KiB) Viewed 772 times

So there is plenty of space overall. Annoyingly I ordered some 1/2W resistors rather than 1/4 for that 4th one along, and I may replace it later, but it's well away from the keycap, but I expect it's tall enough to interfere if it was in one of the spots.

[HigashiJun]

So there is plenty of space overall. Annoyingly I ordered some 1/2W resistors rather than 1/4 for that 4th one along, and I may replace it later, but it's well away from the keycap, but I expect it's tall enough to interfere if it was in one of the spots.

I would replace it too, for the sake of aesthetics...

[rubber_jonnie]

So there is plenty of space overall. Annoyingly I ordered some 1/2W resistors rather than 1/4 for that 4th one along, and I may replace it later, but it's well away from the keycap, but I expect it's tall enough to interfere if it was in one of the spots.

I would replace it too, for the sake of aesthetics...

[PhilC]

what about using some SMD resistors?