Systems Concepts DC-10

The DC-10 from Systems Concepts is a PDP-10 disk controller which interfaced with IBM 2311/2314 compatible drives. It connected to both the I/O bus and to the memory bus; it did not need a separate channel (e.g. a DF10).

The actual drives used at MIT were Memorex Model 660, compatible with the 2314, and later Calcomp Model 215's, also compatible with the 2314, but offering double density.

The PDP-10 I/O device covers two device codes: 610 and 614, which are conventionally named DC0 and DC1.

CONI DC0, bits

Unused																		PIRQC	SRQ	Unused			DEEB	ERR	AEB	ATT	IENB	RUN	ACT	CEB	CHF	CFL	PIA
00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35

CONO DC0, bits

Unused																		1	X	Unused		DENB	ERR	ATEB	CATT	SRQ	IENB	STAR	SGL	CENB	CFLG	CPUF	PIA
00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35

Set status bits according to mask in 22-32.

Unused																		0	1	Unused		DENB	ERR	ATEB	CATT	SRQ	IENB	STAR	SGL	CENB	CFLG	CPUF	PIA
00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35

Clear status bits according to mask in 22-32.

DATAO DC0,

Writes a channel instruction to be executed immediately.

CONO DC1, bits

Unused																																	TMDN
00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35

CONI DC1, bits

Unused		ATDN				TMDN				LAT								Unused						DIPE	RLNER	RCER	OVRRN	CKSER	WTHER	FUNSF	OFFL	PROT	DOBSY	NXM	CPERR
00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35