Apple

GZ/80-A03 - Zilog Z80 turbo card for Apple II computers

Submitted by GG on Thu, 01/30/2020 - 09:57

A new version of this project is available here

gz80The Microsoft Softcard was the first card to allow CP/M software to run on the Apple II. It was originally developed to simplify the porting of Microsoft Basic to the Apple II. It turned out to be a great success and at some point in time it was the most popular CP/M platform in use.
This success prompted the development of many compatible cards. Some exact copies, some enhanced or cost reduced. The GZ/80 is a modern implementation of a Softcard compatible card with an additional turbo mode with approximately double the speed of the original card.

Filed under
Retrocomputing
Apple

A2SCSI-A01 - Apple II SCSI card clone

Submitted by GG on Sat, 10/19/2019 - 17:50

A new version of this project is available here

A2SCSI FrontThe Apple II SCSI card from 1986 was one of the first interface cards to attach a Hard Disk Drive to the Apple II line of computers. A2SCSI is a clone of the last revision (rev.C) of the card with a few enhancements to improve compatibility with modern SCSI drives.

Filed under
Retrocomputing
Apple

GGLABS Memory Test V0.44

Submitted by GG on Sun, 09/15/2019 - 00:39

GMT welcome screenGMT (GGLABS Memory Test) is a new developed memory test for vintage computers optimized for speed and coverage. The code is based on the test algorithms described in "Testing Semiconductor Memories: Theory and Practice" by A.J. van de Goor. The program is mostly in C plus small sections in assembly. It is free software and released under the GPL v3 license.

Filed under
Retrocomputing
Apple
C64

GZ/80-A02 - Zilog Z80 turbo card for Apple II computers

Submitted by GG on Sun, 06/16/2019 - 22:47

A new version of this project is available here

gz80The Microsoft Softcard was the first card to allow CP/M software to run on the Apple II. It was originally developed to simplify the porting of Microsoft Basic to the Apple II. It turned out to be a great success and at some point in time it was the most popular CP/M platform in use.

Filed under
Retrocomputing
Apple

A2SCSI-A00 - Apple II SCSI card clone

Submitted by GG on Wed, 05/22/2019 - 22:12

A new version of this project is available here

A2SCSI FrontThe Apple II SCSI card from 1986 was one of the first interface cards to attach a Hard Disk Drive to the Apple II line of computers. A2SCSI is a clone of the last revision (rev.C) of the card with a few enhancements to improve compatibility with modern SCSI drives.

Filed under
Retrocomputing
Apple

GZ/80-A01 - Zilog Z80 turbo card for Apple II computers

Submitted by GG on Sat, 04/06/2019 - 16:50

A new version of this project is available here

gz80The Microsoft Softcard was the first card to allow CP/M software to run on the Apple II. It was originally developed to simplify the porting of Microsoft Basic to the Apple II. It turned out to be a great success and at some point in time it was the most popular CP/M platform in use.

Filed under
Retrocomputing
Apple

GZ/80-A00 - Zilog Z80 card for Apple II computers

Submitted by GG on Sat, 01/19/2019 - 14:15

A new version of this project is available here

ramgsThe Microsoft Softcard was the first card to allow CP/M software to run on the Apple II. It was originally developed to simplify the porting of Microsoft Basic to the Apple II. It turned out to be a great success and at some point in time it was the most popular CP/M platform in use.

Filed under
Retrocomputing
Apple

GGLABS Memory Test V0.41

Submitted by GG on Sat, 11/03/2018 - 19:01

A new version of GMT is available here

GMT welcome screenGMT (GGLABS Memory Test) is a new developed memory test for vintage computers optimized for speed and coverage. The code is based on the test algorithms described in "Testing Semiconductor Memories: Theory and Practice" by A.J. van de Goor. The program is mostly in C plus small sections in assembly. It is free software and released under the GPL v3 license.

Filed under
Retrocomputing
Apple
C64

RAMGS/8 - small form factor 8MB memory expansion for the Apple IIgs

Submitted by GG on Tue, 05/15/2018 - 01:58

ramgsThe apple IIgs is the most advanced computer in the Apple II series. Equipped with a 65c816 8/16-bit CPU with 24-bit address space it could address up to 16MB of memory. The original rom 01 model shipped with 256KB of fast RAM, the revised rom 3 shipped with 1MB (both had an additional 128KB of standard RAM and 64KB of sound RAM). RAMGS is a newly designed 8MB expansion card for this great classic computer.

Filed under
Retrocomputing
Apple
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