1581 Drive Kits on eBay
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From: David Nelson on 1 Aug 2006 23:55 For existing 1581's (not the kit), how can you tell which version of rom it is? And, of course, where do you get a -02 rom if you don't have a burner to make your own? -David dnelsonfl at yahoo dot com
From: Rusty on 2 Aug 2006 03:55 I have found the 1581 FIX ROMS on eBay auction 150012894092 they are about $5
From: Spiro Trikaliotis on 2 Aug 2006 05:31 Hello David, David Nelson wrote: > For existing 1581's (not the kit), how can you tell which version of > rom it is? The differences are: ROM Addr 01 02 AF8C: 3A 00 C160: 6C 4C C161: 48 AF C162: 00 C5 C5AF: FF 78 C5B0: FF 6C C5B1: FF 48 C5B2: FF 00 ($AF8C seems to be a checksum; the rest is: for ROM -01: $C160 JMP ($0048) [...] $C5AF-$C5B2: unused for ROM -02: $C160 JMP $C5AF [...] $C5AF SEI $C5B0 JMP ($0048) You see that the only difference between the two is the "SEI" which is put before the indirect jump to ($0048). Thus, you can read out $C160 and check if it is $4C or $6C to find out if you have a -02 or a -01 ROM: (Program untested, but it should work) 10 OPEN 1,8,15 20 PRINT#1,"M-R"CHR$(96)CHR$(193)CHR$(1) 30 GET#1,A$ 40 A=ASC(A$+CHR$(0)) 50 IF A = 76 THEN PRINT "ROM -02":GOTO 80 60 IF A = 108 THEN PRINT "ROM -01":GOTO 80 70 PRINT "UNKNOWN ROM!" 80 CLOSE 1 If course, this does not check if you have a totally different ROM. It might be that JiffyDOS (JD) has this bug corrected. > And, of course, where do you get a -02 rom if you don't have a burner > to make your own? Perhaps, someone here is willing to help you out? IF JD has it corrected, you might order a JD ROM. Regards, Spiro. -- Spiro R. Trikaliotis http://opencbm.sf.net/ http://www.trikaliotis.net/ http://www.viceteam.org/
From: David Nelson on 3 Aug 2006 00:25 "Spiro Trikaliotis" <news-200605(a)trikaliotis.net> wrote in message news:slrned0s80.6i2.news-200605(a)news.trikaliotis.net... > The differences are: [...] Thanks for the information. I'll give it a go this weekend when I have some time and find out what version my drive has. Never realized there was such a problem with them. -David
From: xc8/bRONx on 8 Aug 2006 11:37
Rusty wrote: > I have found the 1581 FIX ROMS on eBay auction 150012894092 they are > about $5 Just got one from there... *** IT DOES NOT WORK *** (cannot issue commands to the drive and the activity led is ON for ever...) The chip is a NEC D27c512D-20 // PGM@ 12.5V // 8724EX700 Can I do something with this chip or trash it ? |