2 layers104.1 × 96.5 mm

RAMBoard
chregu82/ISA_1MB_RAM_Board
DIY 8 Bit ISA Slot RAM Board with 1 Megabyte SRAM for XT machines
30 parts2MIT
Boards in 1 GitHub repository, designed in KiCad, that use the SN74LS05N by Texas Instruments (0℃~+70℃ 1 100uA 2V 32ns@5V,15pF 4.75V~5.25V 6 74LS 800mV 8mA PDIP-14 Inverters ROHS). See how each wires it, with its parts, size, README and files; the SN74LS05N’s symbol, footprint and pinout are on its own page.

chregu82/ISA_1MB_RAM_Board
DIY 8 Bit ISA Slot RAM Board with 1 Megabyte SRAM for XT machines