From meriksson@cmu.edu Sun Feb 19 03:21:18 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!meriksson From: meriksson@cmu.edu (Min-jun Eriksson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb19.032118.7964@cmu.edu> Date: Sun, 19 Feb 1995 03:21:18 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. One 28-pin EPROM socket (labeled U14) is completely empty. What firmware was supposed to be in that socket? -- Min-jun Eriksson Zyxel U-1496E @ 19,200 bps "The hatch is open. Is anyone listening?" From noliveira@mindspring.com Sun Feb 19 22:09:18 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!noliveira From: noliveira@mindspring.com (Natalia Oliveira) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Feb19.220918.1852@mindspring.com> Date: Sun, 19 Feb 1995 22:09:18 GMT References: <1995Feb19.032118.7964@cmu.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Feb19.032118.7964@cmu.edu>, meriksson@cmu.edu (Min-jun Eriksson) writes: > Managed to dump the 27256 EPROMs from the TWIN-68 Rev C board recovered from Ashford Poly. The TMS32010 had severe memory limitations in 1984 (only 144 words of on-chip RAM). Dual 68000s gave them full 16MB address space. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Natalia Oliveira | noliveira@mindspring.com PGP Key fingerprint: 3921 1506 2319 9723 "Keep the channels open."