Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!umcp-cs!cvl!umd5!louie From: louie@umd5.UUCP (Louis Mamakos) Newsgroups: net.micro.amiga Subject: Memory/clock expansion for the Amiga (7/9 - mem.sch) Message-ID: <1021@umd5.UUCP> Date: Wed, 11-Jun-86 16:11:21 EDT Article-I.D.: umd5.1021 Posted: Wed Jun 11 16:11:21 1986 Date-Received: Sat, 14-Jun-86 05:02:23 EDT Reply-To: louie@trantor.umd.edu (Louis Mamakos) Organization: U of Md, CSC, College Park, Md Lines: 335 GND [ 1][ 2][ 3][ 4][13][25][37][49][61][73][85] 5V [ 5][ 6] A20 1 +-------+ 15 E 1 +-------+ 3 [56]-------+ |O---- [50]-----+> +---- A21 2 | | 14 2 | 1/2 | 4 [58]-------+ |O---- RFR -----+ 74LS +---- A22 3 | | 13 | 393 | 5 [57]-------+ |O---- 1/6 | +---- RFD | | 12 74LS04 | [E2] | 6 | 74LS |O---- | +--+ | 138 | 11 1 |\ 2 +-------+ | | |O---- ADR* ----| >O---- ADR +---------+ 6 | [A1] | 10 |/ +---+ +--------- 5V 5V ----+ |O---- | O 4 A23 5 | | 9 [B3] |2 +-------+ 5 [59]------O| |O---- SEL* +--+ 1/2 +---- RFRQ 4 | | 7 | 74LS | GND ----O| |O---- | 74 | +-------+ AS* 3 | | 6 [74]--+----+> [B4] |O---- 5 | +-------+ ADR------+ | O 1 4 +--- | 2/6 +-------- RFRAS* AS-------+ \ 6 | 74LS04 2 | |O---+ | 5 |\ 6 RFC*-----+ / | 1/3 74LS10 +----| >O---- AS 1 +--- | |/ PRCH*----+ | 3,4 +--- 74LS20 +-----+ \ 6 13 |\ 12 [A2] 5 | |O---- MRAS --------| >O---- MRAS* 13 +-----+ / |/ RFRQ-----+ | +--- 12 +--- | [B3] ADR*-----+ \ 8 | [A4] 10 | |O---+ +---- 5V AS-------+ / O 4 9 +--- 2 +-------+ 5 RFC*-----+ MRAS---+ 1/2 +---- MUX | 74LS | | 74 | 11 3 | | 6 RFD------+--- CDAC*---+> [A3] |O--- 10 | \ 8 4 +-------+ 2 +-------+ MRAS*----+ |O-------+ +----- RFC* O 1 9 | / | | 3 AS-----+ HOLD*----+--- | |O---- 5 | | 7 +----5V RFC* ----+ 74SL +----- RFRAS* O 10 | 175 | 6 12 +-------+ 10 | |O---- RFRAS MUX----+ 1/2 +---- CAST 12 | [A5] | 10 | 74LS | RFRAS* -----+ +----- PRCH* | 74 | | | 11 CDAC 11| | 9 | |O---- [15]+--+> [B4] |O--- 13 | | 15 | +-------+ CAST -------+ +----- HOLD | O 13 9 | | 14 | +----AS CDAC* ------+> |O---- HOLD* | +-------+ | 3 |\ 4 O 1 +----| >O----CDAC* 1/4 74LS00 +----5V |/ 1 +--- [B3] ADR ----+ \ 3 2 |[B5] |O---- RCYC RFC* ---+ / +--- 2/4 74125 [D4] 2 |\ 3 5 |\ 6 HOLD* ----| >----[66] DTACK* ADR*---+----| >------[18] XRDY |/O | |/O 1| | | 4 | +------+ +--- ADR* 2/6 74LS04 [B3] 11|\ 10 9 |\ 8 UDS* [72]------| >O------ UDS LDS* [70]-------| >O------- LDS |/ |/ 3 11 CAST ------+--- 2/3 74LS10 CAST ------+--- 4 | \ 6 10 | \ UDS -------+[B1] |O----- UCAS* LDS -------+[B1] |O----- LCAS* 5 | / 9 | / MCYC ------+--- MCYC ------+--- 13 12,13 |\ 11 10 +--- 5V----+--- A19 [54]---+---| >O--------+ \ 8 2 | \ 12 | |/ 9 | |O----------+[A4] |O----- RAS1* | RFR ---+ / 1 | / | +--- RAST ---+--- | | 3/4 74LS00 [B5] | 13 | 4 +--- 5V----+--- +---------------+ \ 6 2 | \ 12 5 | |O----------+[B1] |O----- RAS0* RFR----+ / 1 | / +--- RAST ---+--- 12,13|\ 11 10 +--- MCYC*-------| >O-------- MCYC MRAS* ----+ \ 8 |/ 9 | |0---- RAST 4/4 74LS00 [B6] RFRAS* ---+ / +--- 1 +--- RFRQ* -----+ \ 3 4 +--- 2 | |O-----+-------+ \ 6 RFRAS* ----+ / | 5 | |O------ RFR* +--- +-------+ / +--- 13 +-------+ 11 RFR--------O|> +-------- RA0 | 1/2 | 10 | 74LS +-------- RA1 | 393 | 9 | +-------- RA2 12 | [B2] | 8 +------+ +---+---- RA3 | +-------+ | GND | +----------------+ | | 1 +-------+ 3 +---O|> +-------- RA4 | 1/2 | 4 | 74LS +-------- RA5 | 393 | 5 | +-------- RA6 2 | [C6] | 6 +------+ +---+---- RA7 | +-------+ | GND | +----------------+ | |13 +-------+ 11 +---O|> +-------- RA8 | 1/2 | 10 | 74LS +-------- | 393 | 9 | +-------- 12 | [C6] | 8 +------+ +-------- | +-------+ GND A10 6 +-------+ 7 [34]--------+ +------------- MA0 A1 5 | 74LS | 15 [29]--------+ 153 |O----+ 4 | or | 1 | RA0 ---+----+ 74LS |O----+ | 3 | 253 | | +----+ | GND A11 10 | [C1] | 9 [36]--------+ +------------- MA1 A2 11 | | [27]--------+ | 12 | | 2 RA1 ---+----+ +-------- RCYC | 13 | | 14 +----+ +-------- MUX* +-------+ A12 6 +-------+ 7 [38]--------+ +------------- MA2 A3 5 | 74LS | 15 [26]--------+ 153 |O----+ 4 | or | 1 | RA2 ----+---+ 74LS |O----+ | 3 | 253 | | +---+ | GND A13 10 | [C2] | 9 [39]--------+ +------------- MA3 A4 11 | | [24]--------+ | 12 | | 2 RA3 ---+----+ +-------- RCYC | 13 | | 14 +----+ +-------- MUX* +-------+ A14 6 +-------+ 7 [41]--------+ +------------- MA4 A5 5 | 74LS | 15 [21]--------+ 153 |O----+ 4 | or | 1 | RA4 ---+----+ 74LS |O----+ | 3 | 253 | | +----+ | GND A15 10 | [C3] | 9 [43]--------+ +------------- MA5 A6 11 | | [23]--------+ | 12 | | 2 RA5 ---+----+ +-------- RCYC | 13 | | 14 +----+ +-------- MUX* +-------+ A16 6 +-------+ 7 [45]--------+ +------------- MA6 A7 5 | 74LS | 15 [28]--------+ 153 |O----+ 4 | or | 1 | RA6 ---+----+ 74LS |O----+ | 3 | 253 | | +----+ | GND A17 10 | [C4] | 9 [47]--------+ +------------- MA7 A8 11 | | [30]--------+ | 12 | | 2 RA7 ---+----+ +-------- RCYC | 13 | | 14 +----+ +-------- MUX* +-------+ A18 6 +-------+ 7 [52]--------+ +------------- MA8 A9 5 | 74LS | 15 [32]--------+ 153 |O----+ 4 | or | 1 | RA8 ---+----+ 74LS |O----+ | 3 | 253 | | +----+ | GND 10 | [C5] | 9 +--------+ +------------- MA9 | 11 | | +--------+ | | 12 | | 2 +--------+ +-------- RCYC | 13 | | 14 +--------+ +-------- MUX* | +-------+ GND 2 +-------+ 18 MA0 --------+ +-------- p5 all memory chips 17 | 74HC | 3 MA1 --------+ 244 +-------- p7 4 | or | 16 MA2 --------+ Am +-------- p6 15 | 2966 | 5 MA3 --------+ +-------- p12 6 | | 14 MA4 --------+ +-------- p11 13 | | 7 MA5 --------+ +-------- p10 8 | [D3] | 12 MA6 --------+ +-------- p13 11 | | 9 MA7 --------+ +-------- p9 | | 1 | |O---+ | | 19 | | |O---+ +-------+ | GND 2 +-------+ 18 MA8 ---------+ +-------- p1 of all memory chips 17 | 74HC | 3 UCAS --------+ 244 +-------- p15 of rows 1-4 4 | or | 16 LCAS --------+ Am +-------- p15 of rows 5-8 15 | 2966 | 5 RAS0 --------+ +-------- p4 of rows 1,3,5,7 6 | | 14 RAS1 --------+ +-------- p4 of rows 2,4,6,8 R/W 13 | | 7 [68]---------+ +-------- BRW and p3 of all memory chips 8 | [D5] | 12 +----+ +--- | 11 | | 9 +----+ +--- | | | 1 GND | |O----+ | | 19 | | |O----+ +-------+ | GND D15 18 +-------+ 2 [63]---------+ +-------- p2,p14 of E1,E2 D14 17 | 74LS | 3 [65]---------+ 245 +-------- p2,p14 of F1,F2 D13 16 | | 4 [67]---------+ +-------- p2,p14 of G1,G2 D12 15 | | 5 [69]---------+ +-------- p2,p14 of H1,H2 D11 14 | | 6 [71]---------+ +-------- p2,p14 of E3,E4 D10 13 | | 7 [76]---------+ +-------- p2,p14 of F3,F4 D9 12 | | 8 [78]---------+ +-------- p2,p14 of G3,G4 D8 11 | | 9 [80]---------+ +-------- p2,p14 of H3,H4 | [D1] | 19 | | 1 ADR* -------O| +-------- BRW +-------+ D7 18 +-------+ 2 [82]---------+ +-------- p2,p14 of E5,E6 D6 17 | | 3 [84]---------+ 74LS +-------- p2,p14 of F5,F6 D5 16 | 245 | 4 [86]---------+ +-------- p2,p14 of G5,G6 D4 15 | | 5 [83]---------+ +-------- p2,p14 of H5,H6 D3 14 | | 6 [81]---------+ +-------- p2,p14 of E7,E8 D2 13 | | 7 [79]---------+ +-------- p2,p14 of F7,F8 D1 12 | [D7] | 8 [77]---------+ +-------- p2,p14 of G7,G8 D0 11 | | 9 [75]---------+ +-------- p2,p14 of H7,H8 | | 19 | | 1 ADR* -------O| +-------- BRW +-------+ -- Louis A. Mamakos WA3YMH University of Maryland, Computer Science Center Internet: louie@trantor.umd.edu UUCP: {seismo!umcp-cs, ihnp4!rlgvax}!cvl!umd5!louie