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memotron — Retro-inspired DIY 256KB memory expansion for the Amstrad CPC 464 computers | Open App Note

Memotron

inmbolmie

Retro-inspired DIY 256KB memory expansion for the Amstrad CPC 464 computers

Components (18)

Reference	Value	Description
IC1-IC8	TMS4256
Q1,Q2	Q_NPN_CEB
U1	CPC-EXP-PORT
U2,U3	74LS157
U4	74LS74
U5	74LS153
U6	74LS174
U7	74LS27
U8	PAL16L8
U9	74LS11
C1-C14,C16,C17	100nF
C15	56pF
D1	D
H1-H4	MountingHole
J1	Conn_02x25_Odd_Even
JP1,JP2	Jumper_2_Open
JP3	Silicon disk enable
R1-R3	680

Memotron schematic

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Memotron board