| File information: | |
| File name: | AltoDefs.mesa_Oct77.pdf [preview AltoDefs.mesa Oct77] |
| Size: | 35 kB |
| Extension: | |
| Mfg: | xerox |
| Model: | AltoDefs.mesa Oct77 🔎 |
| Original: | AltoDefs.mesa Oct77 🔎 |
| Descr: | xerox mesa 3.0_1977 listing AltoDefs.mesa_Oct77.pdf |
| Group: | Electronics > Other |
| Uploaded: | 05-03-2020 |
| User: | Anonymous |
| Multipart: | No multipart |
| Information about the files in archive: | ||
| Decompress result: | OK | |
| Extracted files: | 1 | |
File name AltoDefs.mesa_Oct77.pdf altodEFS.mESA 24-0CT-77 21;15;31 Page 1 -- AltoDefs.Mesa Edited by Satterthwaite on February 9, 1977 1:43 PM AltoDefs: DEFINITIONS BEGIN wordlength: INTEGER = 16; Alto word length (bits) maxword: CARDINAL = 1777778; N.B. negative as 16 bit number maxinteger: INTEGER 077777B; -- maximum positive number charlength: INTEGER 8; Alto character size (bits) maxcharcode: INTEGER = 3778; BYTE: TYPE = [0 .. maxcharcode]; BytesPerWord, CharsPerWord: INTEGER = wordlength/charlength; LogBytesPerWord, LogCharsPerWord: INTEGER = 1; Page~ize: INTEGER" 256; -- Alto page size (words) LogPageSize: INTEGER = 8; BytesPerPage, CharsPerPage: INTEGER = PageSize*CharsPerWord; LogBytesPerPage, LogCharsPerPage: INTEGER" LogPageSize+LogCharsPerWord; VMLimit: CARDINAL = 177777B; maximum Alto VM address Address: TYPE" [0 .. VMLimit]; MaxVMPage: INTEGER" 255: maximum Alto VM page number MaxFilePage: CARDINAL" 077777B; PageNumber: TYPE" [0 .. MaxFilePage]; PageCount: TYPE" [0 .. MaxVMPage+l]; END. | ||

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