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CC-BY 3.0

45C Memory Module

1 month ago 54
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Memory module based Grant Searle's design. The LED was a last minute addition inspired by Steve Cousins SC108 CPU+memory module. Using a 128kb RAM (AS6C1008) but only 64kb is available, and 64kb ROM where only 32kb is used. The ROM can contain SCMonitor R4 (32kb), with booting into CP/M or Basic.

I may change the design replacing the 74HCT32 and 74HCT00 with a 74HCT74.

Documents

45C Memory Module

45C Memory Module

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted
1 2.54mm 1x40P RC40_BUS HDR-2.54-Z-1X40P 1 2.54mm 1x40P BOOMELE LCSC Yes C2337
2 100nF C2,C3,C1,C4,C5,C6 RAD-0.1 6 Yes
3 27C512D U2 DIP28-600 1 Yes
4 AS6C1008-55PCN U1 DIP32-600 1 Yes
5 SN74HCT32N U5,U6 DIP14-2.54-17.24X6.35MM 2 Yes
6 74HCT138N U3 DIP16-2.54-20.32X5.84MM 1 74HCT138D,653 Nexperia LCSC Yes C5965
7 74HCT00N U4 DIP14-2.54-17.24X6.35MM 1 74HCT00D PHILIPS LCSC Yes C5956
8 LED-3MM LED1 LED-3MM/2.54 1 204-10SURD/S530-A3 EVERLIGHT LCSC Yes C99772
9 1k R1 AXIAL-0.3 1 Yes
10 HDR-IDC-2.54-2X8P P2 2X8 1 IDC Box 2.54mm 16P Straight BOOMELE LCSC Yes C3406
11 JUMPER3 A1 JUMPER3 1 Yes

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