BitsUndBolts BitsUndBolts

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Remon Pel

NETHERLANDS, THE
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Components

	2.0MM 2x12 Pin Header female	x 1
	2.0MM 2x13 Pin Header female	x 1
	CAP-X7R-0603-100NF-16V	x 11
	4Mx4 memory chip / 24/26-Pin SOJ / 5V	x 4
	33Ω Resistor Array / 0603	x 4
	GAL16V8A-15LJ	x 1
	74ABT244PW,118 Nexperia	x 2

Description

MIDI-FORGE Minuet: 8MB AWE64 memory expansion

Upgrade your vintage soundcard with this 8MB memory expansion to store sound fonts in DOS and Windows. The MIDI FORGE Minuet is compatible with Sound Blaster AWE64 sound cards released in 1996/97. AWE64 Value cards can be upgraded to 8MB while AWE64 Gold cards combine onboard memory with the expansion board for a total of 12MB!

The compiled GAL Equations (*.JED) can be found under "Other files for Assembly". The source code and the schematics are attached as well.

For more information, visit my website: https://bitsundbolts.com/2025/07/01/the-smallest-first-diy-8mb-awe64-memory-expansion-board/

Cheers,

BitsUndBolts

Code

GAL Equations

Textile

; Title: AWE64 Memory Interface GAL
; Author: Bits Und Bolts
; Date: June 2025
; Description: Configures 8MB DRAM (4 chips, 4M x 4, 2K-refresh) for AWE64 Value and Gold editions,
;              achieving 8MB/12MB addressable memory respectively. Compatible with PALASM 4 Market Release 1.5.
;---------------------------------- Declaration Segment -----------
TITLE           AWE64_MEMORY_UPGRADE
PATTERN         MINUET
REVISION        A
AUTHOR          Bits Und Bolts
COMPANY         Bits Und Bolts
DATE            26/06/25
CHIP            AWE64Memory PALCE16V8

; Inputs
PIN 1  A11	; Address bit for decoding
PIN 2  A10	; Address bit for decoding
PIN 3  /RAS	; Row Address Strobe (active-low)
PIN 7  BASEM0	; Base memory enable (see table below for details)
PIN 8  /CAS	; Column Address Strobe (active-low)
PIN 9  BASEM1	; Base memory enable (see table below for details)

; Outputs
PIN 13 /CAS0	; CAS Signal
PIN 14 /RAS0	; RAS Signal
PIN 15 CASD	; CAS driver signal
PIN 16 CBR	; CAS-before-RAS refresh (registered)
PIN 17 RA10	; Latched A10 (registered)
PIN 18 RA11	; Latched A11 (registered)

EQUATIONS
CASD   = /CAS
RA11   = /RAS * A11 + RAS * RA11
RA10   = /RAS * A10 + RAS * RA10
CBR    = CASD * /RAS + /CASD * CBR
/CAS0  = /CAS + (/RA11 * /A11 * /RA10 + /RA11 * /A11 * /BASEM1 + RA11) * /CBR
/RAS0  = /RAS

Schematic and Layout

Schematic_MIDI-FORGE-Minuet-V2_2025-07-01.pdf

Download Gerbers Download BOM(Bill of materials)

Jul 01,2025

839 views

MIDI-FORGE Minuet: 8MB AWE64 memory expansion

2 Layers PCB 51.3 x 71.1 mm FR-4, 1.6 mm, 1, HASL with lead, Black Solder Mask, White silkscreen

8MB memory expansion for your Creative Sound Blaster AWE64 to load sound fonts in DOS and Windows.

839

Published: Jul 01,2025

Standard PCB

Download Gerber file 13

BOM(Bill of materials)

Other files for Assembly

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File Last Updated: 2025/07/02 (GMT+8)

File update record

2025-07-0201:30:47

Other files for Assembly are updated.

2025-07-0105:01:57

Other files for Assembly are updated.

2025-07-0105:01:57

Parts List (BOM) is updated.

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