Search found 7 matches
- Tue Sep 19, 2023 5:40 am
- Forum: Computer hardware
- Topic: LAN for 8-bit computers
- Replies: 2
- Views: 3314
LAN for 8-bit computers
how to connect more 8-bit home computers into LAN?
- Tue Sep 19, 2023 5:39 am
- Forum: other MCU and CPU
- Topic: keyboard controlller
- Replies: 3
- Views: 3303
Re: keyboard controlller
CPU 8042 or 8035 are often used as kbd controller
- Wed Aug 02, 2023 8:23 am
- Forum: Computer Asylum
- Topic: Stiff keys on the HP-85
- Replies: 2
- Views: 2182
Re: Stiff keys on the HP-85
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.
- Wed Aug 02, 2023 8:21 am
- Forum: Computer Asylum
- Topic: tape drive on the HP-85
- Replies: 2
- Views: 2219
Re: tape drive on the HP-85
Nonsense, the tape doesn't rewind because the drive wheel is destroyed. Typical failure of HP tape drives.
- Tue Jul 18, 2023 9:06 am
- Forum: Digital circuit w/o MCU
- Topic: circuit A4350
- Replies: 6
- Views: 4308
Re: circuit A4350
so if i understand correctly i can use CMOS 4000 series for A4350 circuit?
- Mon Jul 17, 2023 8:31 am
- Forum: Digital circuit w/o MCU
- Topic: circuit A4350
- Replies: 6
- Views: 4308
Re: circuit A4350
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...
- Sun Jul 16, 2023 2:04 pm
- Forum: Digital circuit w/o MCU
- Topic: circuit A4350
- Replies: 6
- Views: 4308
circuit A4350
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.