GPL 3.0

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42D Memory Module

2 years ago 597
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The design is based on SMBakers 64k memory module (

Pageable 64k RAM memory module using 2x 32k RAM chips a 64kb ROM (16/32kb). I recommend using SCMonitor R3 with this module for ordinary operation. The module has been modified to be working with the #28 Z180 CPU module and SCMonitor 1.00 43. Address selectable, the default address is $38. RC2014 compliant


42d Memory Module

42d Memory Module


ID Name Designator Footprint Quantity
1 62256P RAM1,RAM2 DIP28-600 2
2 100nF C2,C3,C1,C4,C5,C6,C7 RAD-0.1 7
3 27C512D ROM1 DIP28-600 1
4 SN74HCT32N U4 DIP14 1
5 SN74HCT74N U2 DIP14 1
6 SN74HCT139N U1 DIP16 1
7 SN74HCT238E U3 DIP16 1
8 DIP switchEI-08 DIP1 DIP-8-2.54MM 1
9 2.54mm 1x40P RC40_BUS HDR-2.54-Z-1X40P 1
10 Header-Male-2.54_1x3 P4,P6 HDR-3X1/2.54 2
11 Header-Male-2.54_1x1 P5,P7 HDR-1X1/2.54 2
12 10k R1,R2 AXIAL-0.3 2




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