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#1
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Grant posted a hex dump of MBL some time ago in the files section of the Yahoo altaircomputerclub. I recently disassembled that back to source and added some comments. Take a look at:
www.solivant.com/altair_bootloaders/misc/mbl.asm I use the spasm assembler so you may have to make some minor syntax changes if you use another one. I used it recently to load tapes of different vintages and it works great. You do have to play some games with the sense switches if you're loading something older than Basic 4.0 (see the comments in the file), but it's still much better than toggling in a loader every time. Geoff. |
#2
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Basic
Hi Geoff;
THANK YOU !!!!!!!!! THANK YOU !!!!!!!!!!!! This is Just what I needed, it will be a little while before I have the time to put it into an Eprom, But, at least I have something to work with... THANKS AGAIN Marty |
#3
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That is GREAT work Geoff! How long did it take you to do that one?
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#4
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Mbl
Hi Geoff;
I have the program Hand Dissassembled.. And am wondering if I could get the link for the Hex or Octal listing , to compare it with. I am using my BugBook III, for 8080 op codes and Hex and Octal numbers. I also have the other Bug Books ( I thru VI, except IV which was never made) THANK YOU AGAIN Marty |
#5
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Quote:
Quote:
What are you disassembling? If you need me to assemble MBL for a particular address, I'll be glad to do that and send you the resulting binary. Geoff. |
#6
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Mbl
Hi Geoff;
I used the wrong word, that can happen late at night, when up and still half asleep, and trying to get back to sleep, by doing something for a short time. I assembled it by hand. I don't have an assembler for the 8080 except for listings for some of my machines. I have one which I like for my Digital Group machine, which I would like to put on my Altair, but I also would have to also transfer the whole operating system, which I want to do, (but would need to transfer the I/O from Digital Group to Altair I/O) but don't have enough experience to do so with 8080 op code , yet. The operating system is called ICOSE and was written for the Digital Group Machine, but not by them. I also have two assemblers for the 8080 by Scelbi. (I Think) THANK YOU Marty |
#7
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putting parts in
Hi to all;
When assembling the circuit boards, I would recemend going from short height to higher, in other words I would put in the jumpers, then caps , then the resistors, then the sockets and so forth. not as the manual shows the other way around. they are easier to put in and solder that way also.... good luck to all... Thanks Marty |
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