NCR Personal Computer 3277 PC-4i (Early)
Chipset
Socket 
FSB speed 4.77MHz
Form factorOEM / Proprietary
Dimensions280mm x 300mm
Cache
None/Integrated in the CPU
Max RAM size
640KB
RAM type DIP-16 (1bit)
PSU connector
I/O ports1x
Floppy interface
1x
Parallel
2x
Serial
1x
XT Keyboard
Expansion slots7x
8-bit ISA
Last updated 2025-05-17T09:59:41Z
Board info score is 7.9/10
Chips
-> Chipset part
Intel 8253 (Programmable Interval Timer)
Intel 8255A (PPI)
Intel 8284A (Clock Generator and Driver)
Intel 8288 (Bus Controller)
(multiple brand) Discrete Logic
Intel 8237A (DMA Controller)
Intel 8259A (Programmable Interrupt Ctrl.)
-> Floppy ctrl.
-> Signal transmitter/receiver
-> UART ctrl.
No drivers available
1 board document available
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
2006-06-15
File
Logs
Chip
Release date
1997-06-13
File
Logs
Chip
Release date
1997-06-13
File
Logs
Chip
Release date
File
Logs
Image 1 of 1 (evasive)
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