#21
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Paul |
#22
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All that was pretty boring and I don't really have any tips to offer. I made lots of mistakes in loading the programs through the switches. I played around with the am radio program and made a few different tunes, including the first half of Happy Birthday. I would recommend anyone who has a musical ear try that one. I would key in the song data, run the program, hear any notes that were not right, and quickly fix just the relevant notes until the pitch was correct. Musical trial and error. Perhaps now that I understand how to input data from the serial IO card I will try to capture the keystrokes that come in and store them in memory somewhere to create the tone sequences for songs instead of manually loading successive memory locations with the relevant values. It is probably even straightforward enough to make the altair play tones as I press keys and I might try that as well. These are just some ideas to get some fun out of the work done so far. Nothing earthshattering, just basics. Paul |
#23
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Echo
Hi Grant;
I didn't realize that I needed to do that, and I just copied the program out of 'computer notes' Thanks for correcting me, I'll have to try it next time when I get to my machine. Paul, Add the initialization part to the top of the program that I had for you. And see if it works. Thats probably why my board sometime worked and sometimes didn't. Thanks Grant, Again !!!! |
#24
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Echo
Hi Paul;
There is a musical program from Dr. Dobbs, that I have at home, which works from the sense switches, I'll try to get it for you the next time i'm home. and here is the origional program from computer notes, I think it has some ERRORS in it, but it should point you in the right direction. Also I know there are some articles about the 88-sio and the 88-2sio, somewhere in the 'computer notes' ,, I just didn't have time to locate them last night. This came from 'computer notes vol 1, issue 6. 000 333 001 000 002 017 003 332 004 000 005 000 006 333 007 001 010 062 011 040, this can be anywhere you want in memory 012 000 013 333 014 000 015 007 016 332 017 012, I think this should be 013 020 000 021 072 022 040 , this can be anywhere you want in memory 023 000 024 323 025 001 026 303 027 000 030 000 There were some other programs in this article that I didn't copy. Have a good time, Thanks Marty |
#25
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From the book:
Echo routine for the Altair 8800 computer to communicate with a serial terminal via the 88-2SIO. Page 140 of "The S-100 Bus Handbook". 000 : 076 001 : 003 002 : 323 003 : 020 004 : 076 005 : 021 006 : 323 007 : 020 010 : 333 011 : 020 012 : 017 013 : 322 014 : 010 015 : 000 016 : 333 017 : 021 020 : 323 021 : 021 022 : 303 023 : 010 024 : 000 |
#26
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echo program
Hi Paul;
I Just found and copied the same program for you from vol. 2 issue 2 of the computer notes. Also vol .2 issue 1 has some information. Thanks and have a good weekend Marty |
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