Den Wed, 7 Mar 2018 01:18:17 +0000 (UTC) skrev Steve Gray <sjgray@rogers.com>: > The Max Machine uses a 6566 VIC-II chip (which uses SRAM rather than > DRAM). Early documentation of the CBM-II series (source code) also > mentions use of the 6566. However, released machines use the 6567, > which leads me to believe that both were developed at almost the same > time. The CBM-II series and the C64 are also very close, and were > announced at the same time, unfortunately delays in the CBM-II line > release make it seem much later. In my B-Series prototype: Commodore > CBM-II B-Series Prototype Computer, which so far is the earliest > known CBM-II machine, the 6509 CPU is dated 2282 (22nd week of 1982), > the SID is 1382, and the 6526 is 0882 Steve Maybe the 1k SRAM is a leftover from early P500 prototypes using the 6566? And then since P500's were only ever prototypes they never bothered to remove that SRAM as the computer works which itself is a good goal to reach for a prototype, and felt it were a better idea to do a prototype production run with the SRAM just to get some computers to for example software developers? The dates of early 6566 and 6567's could probably tell something. -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies. Message was sent through the cbm-hackers mailing listReceived on 2018-03-07 18:04:25
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