[sebhc] Z-100 upgrade modules (ZMAX memory upgrade and ZCLK clock) available
ddl-cctech at danlan.com
Fri Apr 14 22:31:26 CDT 2006
|The 2nd item is a ZMAX - Z100 motherboard memory maximizer kit by Rick
|Pegg and produced and marketed by Graymatter Applications Software.
|Works only with later module Z-100 motherboards, does include written
|instructions for the modifications, the 6 specialized chips required and
|27 (3 banks x 9 ICs per bank) 256K bit D-RAMS. Gives you a wacking 768K
|bytes of memory! You can also use the 32K RAM chips you remove to
|upgrade the video system (instructions included).
Interesting; what are the 6 specialized chips? We used to do this
with one multiplexor (74LS157?) and a bent pin on the memory decode
PAL. Older machines needed a newer monitor ROM as well.
ddl at danlan.*com
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