MICROFORUM

I am looking for a CRT for my HP-85A desktop calculator.

I have HP-85A desktop calculator. It seems that the CRT is dead. Is it a way to replace the CRT with an LCD?

how to connect more 8-bit home computers into LAN?

CPU 8042 or 8035 are often used as kbd controller

no lubrication will help. If you pour oil in there, you will destroy the switch. The problem is in the cracked plastic line of the switch. The key gets stuck in it and won't come back.

Nonsense, the tape doesn't rewind because the drive wheel is destroyed. Typical failure of HP tape drives.

so if i understand correctly i can use CMOS 4000 series for A4350 circuit?

I have several OKU calculators, but none of them work. They mostly have non-functioning buttons or broken wires to the keyboard board. I don't know where to reconnect the wires. So I thought of soldering the calculator circuit, making a new board and improving the calculator, adding memory and makin...

Does anyone have information on how the A4350 calculator circuit is connected? It is said to have been cloned by the Soviets and used in their calculators.