Received: from lcs.mit.edu (CHAOS 15044) by MC.LCS.MIT.EDU 16 Nov 89 14:30:04 EST Received: from sunic.sunet.se by mintaka.lcs.mit.edu id aa20265; 16 Nov 89 13:42 EST Received: from AIDA.CSD.UU.SE by sunic.sunet.se (5.61+IDA/KTH/LTH/1.99) id AAsunic17574; Thu, 16 Nov 89 19:41:32 +0100 Date: Thu 16 Nov 89 19:40:31 From: Johnny Billquist Subject: My address... To: pdp8-lovers@MC.lcs.mit.edu Message-Id: <891116194031.14.D89.JOHNNY-BILLQUIST@AIDA.CSD.UU.SE> has changed. Since I don't know which people might have my old address, I'm sending this to all you guys on pdp8-lovers. My old address was bqt@kicki.stacken.kth.se, but since the funny actions of the owner of that machine (Peter Lothberg) has disabled my account for no reason on that machine, you can no longer send any mail to me there. Please note my new (and only) address is: D89.Johnny-Billquist@aida.csd.uu.se Kind regards Johnny Received: from lcs.mit.edu (CHAOS 15044) by MC.LCS.MIT.EDU 21 Nov 89 14:36:08 EST Received: from [130.237.216.2] by mintaka.lcs.mit.edu id aa05826; 21 Nov 89 14:28 EST Received: from AIDA.CSD.UU.SE by sunic.sunet.se (5.61+IDA/KTH/LTH/1.99) id AAsunic19142; Tue, 21 Nov 89 20:27:21 +0100 Date: Tue 21 Nov 89 20:25:50 From: Johnny Billquist Subject: The program problem... To: pdp8-lovers@MC.lcs.mit.edu Message-Id: <891121202550.22.D89.JOHNNY-BILLQUIST@AIDA.CSD.UU.SE> Did anybody manage to write a program that clears 4kw memory, including the space that the program resides in? I didn't. Cold we have the answer, maybe. Johnny Received: from lcs.mit.edu (CHAOS 15044) by MC.LCS.MIT.EDU 21 Nov 89 14:43:50 EST Received: from sunic.sunet.se by mintaka.lcs.mit.edu id aa18994; 21 Nov 89 14:34 EST Received: from AIDA.CSD.UU.SE by sunic.sunet.se (5.61+IDA/KTH/LTH/1.99) id AAsunic19398; Tue, 21 Nov 89 20:33:49 +0100 Date: Tue 21 Nov 89 20:32:18 From: Johnny Billquist Subject: MACREL... To: pdp8-lovers@mc.lcs.mit.edu Message-Id: <891121203218.22.D89.JOHNNY-BILLQUIST@AIDA.CSD.UU.SE> Hi, all you pdp8 lovers out there... Does anybody has the sources for MACREL version 2? I have the binaries, but would like to have the sources as well. Johnny Received: from AI.AI.MIT.EDU (CHAOS 3130) by MC.LCS.MIT.EDU 22 Nov 89 08:54:31 EST Date: Wed, 22 Nov 89 08:55:31 EST From: "Robert E. Seastrom" Subject: The program problem... To: "D89.JOHNNY-BILLQUIST@AIDA.CSD.UU.SE"@MINTAKA.LCS.MIT.EDU cc: pdp8-lovers@MC.LCS.MIT.EDU In-reply-to: Msg of Tue 21 Nov 89 20:25:50 from Johnny Billquist Message-ID: <672248.891122.RS@AI.AI.MIT.EDU> Here's one that I just whipped up. My PDP-8s are in storage, else I'd check it, so someone else will have to do it for me. *0 DCA IZ 10 0 0 0 0 0 0 0 *10 11 *7773 LOOP, CLL CLA SKP DCA JPK DCA IZ 10 JPK, JMP LOOP Theory of operation: Start program at 7773. It will start dropping zeros into memory beginning at location 11. Bear in mind that 0000 is AND 0; if the accumulator is clear, it serves as a two-cycle no-op. The CLA CLL is not necessary except on the first pass, and is the first instruction of the program to get wiped out. Next instruction to die is the SKIP, which will cause (on the next loop) the DCA JPK instruction to be executed, obliterating the jump. The program counter will loop around to 0000 and clear out the last couple of words... ---Rob