Garrett's Workshop

We design, manufacture, and sell memory products for legacy computer systems.

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Drivers and Documentation

RAM2GS II (GW4201D) 8 MB RAM for Apple IIgs

Garrett's Workshop RAM2GS II (GW4201D) Manual (PDF)
GWRAM RAM Capacity Selection Utility (140 kB .PO disk image for 5.25" drives)
GMT Memory Test 0.41¹ (140 kB .PO disk image for 5.25" drives)

RAM2E II (GW4203B and GW4203C) 8 MB RAM for Apple IIe

Garrett's Workshop RAM2E II (GW4203C) Manual (PDF)
Garrett's Workshop RAM2E II (GW4203B) Manual (PDF)
Garrett's Workshop RAM2E II (GW4203B) Developer Note (PDF)
Original RAMWorks III Manual² (PDF)
GWRAM RAM Capacity Selection Utility (140 kB .PO disk image for 5.25" drives)
Applied Engineering ProDOS RAM Drive & Desktop Expander for AppleWorks 1.x² (140 kB .PO disk image for 5.25" drives)
Applied Engineering Desktop Expander for AppleWorks 2.x and 3.x² (140 kB .PO disk image for 5.25" drives)
RAM2E II (GW4203C) Firmware Version C.1.0 RC3 (EXE)
RAM2E II (GW4203C) Firmware (with DHGR disabled for rev. A machines) Version C.1.0 RC3 (EXE)

RAM128 (GW4208A and GW4208B) 128 kB RAM for Apple II

Garrett's Workshop RAM128 (GW4208B) Manual (PDF)
Garrett's Workshop RAM128 (GW4208A) Manual (PDF)
Original Saturn 128 Manual³ (PDF)
Saturn 128 Utilities for DOS 3.3³ (140 kB .DSK disk image for 5.25" drives)
Saturn 128 Utilities for Pascal³ (140 kB .DSK disk image for 5.25" drives)
Saturn 128 Utilities for CP/M³ (140 kB .DSK disk image for 5.25" drives)

GR8RAM (GW4205A) 8 MB RAM for Apple II

Garrett's Workshop GR8RAM (GW4205A) Manual (PDF)
Original Applied Engineering RAMFactor Manual⁴ (PDF)
GR8RAM (GW4205A) Firmware Version A.1.0 RC8 (EXE)

TimeDisk (GW4206A and GW4206B) 1 MB Battery-Backed RAM & Clock for Apple II

Garrett's Workshop TimeDisk (GW4206B) Manual (PDF)
Garrett's Workshop TimeDisk (GW4206A) Manual (PDF)
Original Applied Engineering RAMFactor Manual⁴ (PDF)
NoSlotClock Utility⁵ (140 kB .DSK disk image for 5.25" drives)
TimeDisk (GW4206B) Firmware Version B.1.0 RC6 (EXE)

GW4402B and GW4402A ROM SIMM for Mac SE/30 and Mac II-series

Garrett's Workshop ROM SIMM (GW4402B) Manual (PDF)
Garrett's Workshop ROM SIMM (GW4402A) Manual (PDF)
Pre-programmed GW4402B ROM image with System 7.1 ROM disk (8 MiB .bin file)
Pre-programmed GW4402B ROM image with System 6 ROM disk, IIx ROM, IIsi ROM (8 MiB .bin file)
Unmodified Macintosh IIsi ROM⁶ (8 MiB .bin file: original 512 kiB ROM repeated 16 times)
Unmodified Macintosh IIx, IIcx, SE/30 ROM⁶ (8 MiB .bin file: original 256 kiB ROM repeated 32 times)
Unmodified Macintosh IIci ROM⁶ (8 MiB .bin file: original 512 kiB ROM repeated 16 times)
Unmodified Macintosh IIfx ROM⁶ (8 MiB .bin file: original 512 kiB ROM repeated 16 times)
GW4402B base ROM image with ROM disk driver and RAM test enabled (512 kiB .bin file)
GW4402B base ROM image with ROM disk driver and RAM test disabled (512 kiB .bin file)
dougg3/BMoW ROM SIMM Programmer software⁷ (link to GitHub)
Firmware for dougg3/BMoW ROM SIMM Programmer⁷ (link to GitHub)
ROM Fitment Clip - "flat type" / "type A"⁸ (.STL file)
ROM Fitment Clip - "cross type" / "type B"⁸ (.STL file)

GW4301A 2 MB geoRAM Clone for Commodore 64

Garrett's Workshop GW4301A Manual (PDF)
GEOS installation guide (including geoRAM drivers)¹⁰
GMT Memory Test 0.44¹⁰ (170 kB .D64 disk image for 1541/1571-type 5.25" drives)
GMT Memory Test 0.44¹⁰ (800 kB .D81 disk image for 1581-type 3.5" drives)

ROM01 Upgrade for Apple IIgs

Garrett's Workshop ROM01 Upgrade Manual (PDF)

GW419X-series 30-pin RAM SIMMs

GW4404A and GW4405A 68-pin VRAM SIMMs for Macintosh

GW4406A 3 MB RAM for Macintosh Classic

Garrett's Workshop 3 MB RAM for Macintosh Classic (GW4406A) Manual (PDF)

^{[1] GMT memory test courtesy GGLabs and licensed under the GPL}
^{[2] RAMWorks manual and utilities courtesy Applied Engineering}
^{[3] Saturn 128 manual and utilities courtey Titan Technologies}
^{[4] RAMFactor manual and software courtesy Applied Engineering}
^{[5] NoSlotClock utility courtesy SMT Peripherals}
^{[6] ROM courtesy Apple}
^{[7] ROM SIMM Programmer software and original firmware courtesy dougg3}
^{[8] ROM Fitment Clips modified from original by Joel "PotatoFi" Crane and licensed under CC BY-SA 4.0.}
^{[9] GEOS courtesy Berkeley Softworks}
^{[10] installation guide is hosted and maintained by cbmfiles.com}