home *** CD-ROM | disk | FTP | other *** search
- Name Datasep;
- Partno CA0022;
- Date 10/1/86;
- Revision 01;
- Designer Kahl;
- Company Personal CAD Systems, Inc.;
- Assembly Floppy Disk Interface;
- Location U32;
- Device EP600;
-
- /************************************************************************/
- /* */
- /* Single Density Floppy Disk Data Separator */
- /* */
- /* This is a single chip inplementation of the data separator circuit */
- /* which first appeared on the Tarbell S-100 Floppy Disk Interface. */
- /* It receives raw FM data from the (single density) 8" disk drive and */
- /* derives the floppy disk controller (Western Digital 1771B-01) clock */
- /* and data. The device also generates a 2 MHz square clock for the */
- /* FDC timing. A reset signal was added to improve initialization. */
- /************************************************************************/
- /* Allowable Target Device Types: Altera EP600 */
- /************************************************************************/
-
- ORDER:
-
- 4MHz1,4MHz2,%1,raw_data,%1,!reset,%2,
- 2MHz,%1,q6..0,%1,fdclk,%1,fddata;
-
- /* Outputs not simulated: load_lower,load_upper,
- data_sync_4,data_sync_8,
- data_sync_16,data_div_2
- */
-
- VECTORS:
-
- $msg" r ";
- $msg" a ";
- $msg" ! w f";
- $msg" 44 r - f d";
- $msg" MM e d 2 d d";
- $msg" HH s a M c a";
- $msg" zz e t H qqqqqqq l t";
- $msg" 12 t a z 6543210 k a";
- $msg" ---------------------";
- 00 0 x L LLLLLLL N N /* Master Reset */
- C0 1 x H NNNNNNN N N /* Verify 2 MHz Clock */
- C0 1 x L NNNNNNN N N