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From: alkman@hexagon.se (Stefan Alkman)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: MEGA4 internal bus
Keywords: MEGA4, bus
Message-ID: <1825@hexagon.se>
Date: 12 Dec 90 15:20:58 GMT
References: <4395@sactoh0.SAC.CA.US> <1990Dec11.062945.1551@santra.uucp>
Reply-To: alkman@hexagon.se (Stefan Alkman)
Organization: Hexagon Computer Club, OErebro, Sweden
Lines: 44

In article <1990Dec11.062945.1551@santra.uucp> s37837k@saha.hut.fi (Jari Lehto) writes:

>The internal bus (Megabus) is directly (parallel) connected with the CPU.
>Only thing you have to do is to measure which pin leads to which pin of
>the MC 68000. You have the pin assignment of the 68000?

Here you have the pinout:s of the Megabuss:

	1  - D4		2  - D5
	3  - D3		4  - D6
	5  - D2		6  - D7
	7  - D1		8  - D8
	9  - D0		10 - D9
	11 - AS*	12 - D10
	13 - UDS*	14 - D11
	15 - LDS*	16 - D12
	17 - R/W*	18 - D13
	19 - DTACK*	20 - D14
	21 - BGO*	22 - D15
	23 - BGACK*	24 - GND
	25 - BR*	26 - A23
	27 - GND	28 - A22
	29 - CLK8	30 - A21
	31 - GND	32 - GND
	33 - HALT*	34 - A20
	35 - RESET*	36 - A19
	37 - VMA*	38 - A18
	39 - E		40 - A17
	41 - VPA*	42 - A16
	43 - BERR	44 - A15
	45 - ENI 7*	46 - A14
	47 - ENI 5*	48 - A13
	49 - ENT 3*	50 - A12
	51 - FC2	52 - A11
	53 - FC1	54 - A10
	55 - FC0	56 - A9
	57 - A1		58 - A8
	59 - A2		60 - A7
	61 - A3		62 - A6
	63 - A4		64 - A5
-- 
Stefan Alkman					  Voice: +46-19-164787
alkman@hexagon.se     	or         !sunic!kullmar!pkmab!hexagon!alkman
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