Hardware Museum

Виртуальный музей компьютерной техники

Контроллеры

Дата: 1 Августа 2020

IBM 62X0776

https://hwmuseum.pp.ua/controller/2578.html

Supported the particular 20 MB sized drives that were optionally fitted to the later model 5160s.
IBM referred to this controller as the "20MB Fixed Disk Drive Adapter"

Switch Settings

Switches 1 2 configure drive 0.
Switches 3 4 configure drive 1.

The following table shows the settings for drive 0 (i.e. switches 1 2).  The settings for drive 1 (i.e. switches 3 4) are the same.
 

Table
Address		 Switch Settings
for drive 0		 Drive Characteristics Example Comment
0 1=on  2=on  Cylinders = 306  /  Heads = 4  /  SPT = 17  /  WPC = 0  /  step pulses per here are valid    Not IBM Type 1 - type 1 has a WPC of 128
1 1=on  2=off  Cylinders = 612  /  Heads = 4  /  SPT = 17  /  WPC = 0  /  step pulses per here are valid    In 1986, known as IBM Type 16
2 1=off  2=on  Cylinders = 615  /  Heads = 4  /  SPT = 17  /  WPC = 300  /  step pulses per here are valid Seagate ST-225   [20MB HH]  In 1986, known as IBM Type 2
3 1=off  2=off  Cylinders = 306  /  Heads = 8  /  SPT = 17  /  WPC = 128  /  step pulses per here are valid IBM WD25   [20MB FH]  In 1986, known as IBM Type 13


The information in the above table was sourced the book: Upgrading Repairing PCs, Scott Mueller, 5th Edition, page 761/762/763    (or page 387 of 1st edition)
That matches well with the list that SpeedStor software reports.

IBM Fixed Disk Adapter

Производитель IBM
Страна Taiwan
Год выпуска 1986
Маркировка IBM 62X0776
Используемые чипы XEBEX 3198, Zilog Z80 CPU, XEVEC 8642HQG
On-board BIOS ROM C800:5
Интерфейс ISA-8bit
Тип MFM disk drive controller