ACC Microelectronics KT-204

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ACC Microelectronics KT-204
ACC Microelectronics KT-204.jpg
Bus type ISA
Bus width 8-bit
Bus speed 8 MHz
Manufacturer ACC Microelectronics
Chipset MCS3201FN
Compatible with PC Floppy
Connectors None
Requires -5VDC? No
Requires -12VDC? Yes
Config method Jumpers
Floppy Controller
Floppy buses 2
Drives per bus 2
Secondary?  ?
"?" is not recognized as a Boolean (true/false) value.
ROM type 28-pin JEDEC
Driver N/A

The KT-204 is an 8-bit floppy controller capable of supporting up to four 1.44MB drives. It includes a boot ROM, allowing the system to boot from a floppy disk even when the BIOS does not support doing so (e.g. booting from 1.44MB disks on an XT.)

Jumpers

Drive/size SW1
Drive 0 1 2
Drive 1 3 4
Drive 2 5 6
Drive 3 7 8
360 K on on
720 K on off
1.2 M off on
1.44 M off off
Address J1
Primary open
Secondary closed

TODO: Is this the address of the controller or the boot ROM, or both?

Internal connectors

CN1
First floppy bus (drives 0 and 1)
CN2
Second floppy bus (drives 2 and 3)


Additional photos

Related links