C128DCR MOS5710 Custom Floppy Controller and Gate Array _____________ Floppy Drive Controller (*) | |_| | 1541/1571 Mode Control (#) SRQ OUT | 1 48 |-DATA OUT CIA Serial Port TED |#2 47 | SRQ IN 16 MHz Clock & phi0 phi0 | 3 46 |-DATA IN RAM & VIA Select CK |#4 45 |-IRQ -ACCL |#5 44 |-RESET VIA1 PA5 |#6 43 | phi2 | 7 42 | Address Decode D7 | 8 41*|-INDEX D6 | 9 40*| WG A 15 14 13 12 10 4 3 D5 | 10 39*|-WPRT RAM 0 0 0 0 x x x D4 | 11 38*|-RD VIA1 0 0 0 1 0 x x Vss | 12 37*| WD VIA2 0 0 0 1 1 x x Vcc | 13 36 | Vcc FDC 0 0 1 0 x 0 0 D3 | 14 35 | Vss CIA 0 1 0 0 x 0 x D2 | 15 34 |-VIA1 FDC2 0 1 0 0 0 1 x D1 | 16 33 |-RAM RAM 0 1 1 x x x x D0 | 17 32 |-VIA2 A15 | 18 31 | R/W A14 | 19 30 | 16MHz A13 | 20 29 | XTL1 Registers A12 | 21 28 | XTL2 A10 | 22 27 | A0 2000 FDC Status Register A4 | 23 26 | A1 2001 FDC Track Register A3 | 24 25 | A2 2002 FDC Sector Register |_____________| 2003 FDC Data Register 2004 FDC Control for 2001, 2002 2005 FDC Control/Counter for 2001, 2002 400C CIA Serial Data Register 400D CIA Interrupt Control Register 400D CIA Control Register A 4010 FDC2 used in 2002, 2004 4011 FDC2 used in 2002 4012 FDC2 used in 2001 4013 FDC2 used in 2001 4014 FDC2 used in 2002 4015 FDC2 used in 2002 4016 FDC2 used in 2003 4017 FDC2