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Re: Printing the Unprintable

by hv (Parson)
on May 20, 2004 at 10:14 UTC ( #354911=note: print w/replies, xml ) Need Help??


in reply to Printing the Unprintable

Many years ago I wrote assembler for a 6800-based mini with very simple display screens - 8 rows of 32 characters, each character being encoded by 6 bits for the value (no lower case), along with one bit for "underline" and one bit for "flashing".

The displays were directly memory mapped in 256-byte blocks starting at 0xc000, and the O/S also split memory up into 256-byte buffers. So if you wanted to see what was actually going on, you just poked 0xc1 into a buffer-id to get a real-time display on VDU 1 of what the program on VDU 0 was doing.

Tell people these days that you used to work with a multi-tasking O/S on an 8-bit platform capable of driving 48 VDUs and 56 printers with 48K of RAM and they laugh at you. :(

Hugo

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[perldigious]: Also coincidentally, I'm currently in the middle of a winter storm that has dropped 1 foot of snow and is expected to drop another. I might have to adapt this for customers/vendors who come visit and put it at the beggining of every presentation I give.
[Discipulus]: the photo was removed... Cyrano de Berjerac was not of the same idea..
[stevieb]: perldigious: video near our hq in Montreal. Here in Calgary, it's -28c... we've only got 3" of snow so far, but there are several feet in the mountains already
[perldigious]: Snowshoeing time stevieb? I need to buy a pair so I can walk my German Shepherd properly through the country.
[stevieb]: yeah, I snowshoe a fair amount in the mountains. I also use spikes similar to these very often as well
[perldigious]: Discipulus: alternate link

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