FEATURES
o Hard-Sectored Operation - performs all data operations o Single or Double Density Operation- recording code independent o Minifloppy or Standard Floppy compatible o Programmable Sync Byte o Internal Sync Byte Detection and Byte Framing o Fully Double Buffered o Data Overrun/Underrun Detection o Dual Disk Operation - Write on one disk drive while simultaneously reading from another o Tri-State Output Bus for processor compatibility o TTL Compatible Inputs and Outputs . PIN CONFIGURATION RD RCK RDRR ROE RDR RDL RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0 NC NC NC NC NC Vee \..../ 40 PSBS 39 WDS 38 WCK 37 FBS 36 SBD 35 RG 34 WD7 33 WD6 ':0:: WD5 WD4 11 30 WD3 12 29 WD2 13 28 WD1 14 27 WD0 15 26 VOD 16 25 WDU 17 24 GND 18 23 WD 19 22 WDR 20 21 NC PACKAGE: 40-Pin D.I.P. GENERAL DESCRIPTION
During a write operation, the HSDH receives data from the processor and shifts it out bit-serially to the floppy disk data encoding logic. Similarly, during a read operation the HSDH receives a bit-serial...
SMSC
