ACC Microelectronics KT-204
From Vogons Wiki
ACC Microelectronics KT-204
| 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
Underside
Jumper settings
BIOS
During POST, a banner similar to the following is displayed:
ACC Microelectronics Advanced FDC Firmware v1.0c
Related links
- retroarchive.org ROMs - acc-105b.rom (ACC Microelectronics FDC ROM v105B) is a ROM for this card. The signature at the end of the file states v1.0b so it is unclear where the "5" comes from.
