Home ⇒ Hardware ⇒ Boards⇒ Z80-MDC

::.. Memory/Disk Controller Board (Z80-MDC) ..::

Back

Description
Short info Floppy Disk Controller and Memory Expansion for MCZ Systems
Designed to work in conjunction with a Z80-MCB or Z80-MCB/MT board.
Capable of handling up to eight (8) floppy disk drives.
Components
CPU none
ROM none
RAM Dynamic RAM, Three (3) banks (3 x 8 sockets x 1)
16KiB, 32KiB or 48KiB (with 16Kibit x 1 DRAM chips)
Organized in 4KiB pages. Each page positioned anywhere in the 64KiB address space on a 4K boundary.
Floppy interface Z80®-PIO for disk control and status
Chip for 16bit CRC generation and check
Parallel-to-serial and serial-to-parallel conversion circuitry
FM modulation recording mode, single-sided hard-sectored floppy disks
Optional components PROM-based firmware
To control up to two (2) Shugart 801R floppy drives. This firmware manages a single-density, single-side hard-sectored format of 32 sectors per track and 77 tracks per disk. The firmware provides all control functions for the disk and performs all data transfer.
Other parameters
Power Single 5V, ca. 1.6A
Onboard voltage converter for additional memory voltages (+12V, -5V)
Connector 122 pin edge connector (2x61 direct)
Z80® bus and control lines
Serial data lines, control and status lines to the floppy disk drives
Power (+5V, GND)
Photo [MDC Board]

Top Back