https://assets.nexperia.com/documents/data-sheet/74HC_HCT4040.pdf
On the XC7A100T-1FGG484, which is the slowest speed grade, it meets timing at 62.5 MHz. Since my 1802 core only needs one clock per machine cycle, versus 8 for the original CDP1802, it runs at the equivalent of a 500 MHz CDP1802.
COLD[CR] 1802 FIG-FORTH R0.4 3/16/81 : SET-LED 61440 C! ; [CR] OK : GET-LED 61440 C@ ; [CR] OK : DELAY 3000 0 DO LOOP ;[CR] OK : LEFT 7 0 DO GET-LED 2 * SET-LED DELAY LOOP ;[CR] OK : RIGHT 7 0 DO GET-LED 2 / SET-LED DELAY LOOP ;[CR] OK : RUN 1 SET-LED BEGIN LEFT RIGHT ?TERMINAL UNTIL ;[CR] OK RUN[CR]
27C256 evtl. 28C256, Ich habe noch 2 Stk. 27C256 EPROM im Keller!
http://humanoidolabs.blogspot.ch/2012/03/propeller-elf-ii.html
https://www.retrobrewcomputers.org/doku.php?id=boards:sbc:cpu280:start
μPD75008
75XL μPD750008
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forth-von-innen.pdf | r1 | manage | 45.3 K | 2018-09-16 - 21:02 | PeterSchmid |