Retrocomputing

GZ/80S - 20MHz Z-80 PCPI Applicard compatible Apple CP/M card

Submitted by GG on Tue, 04/06/2021 - 14:43

GZ80 B03The PCPI Appli-Card was the first single board computer style CP/M card for the apple II. It featured a 6MHz Z-80 CPU paired with 64KB of RAM and 2KB of ROM. Thanks to the high clock and zero wait states DRAM accesses the card performed almost 3 times as fast as the Microsoft SoftCard. The GZ/80-B00 is a new implementation of the PCPI card with a 20MHz Z-80 CPU and 512KB of static RAM.

Filed under: 
Retrocomputing
Apple

GZ/80S-B00 - 20MHz Z-80 PCPI Applicard compatible Apple CP/M card

Submitted by GG on Thu, 04/02/2020 - 02:19

A new version of this project is available here

GZ80 B00The PCPI Appli-Card was the first single board computer style CP/M card for the apple II. It featured a 6MHz Z-80 CPU paired with 64KB of RAM and 2KB of ROM. Thanks to the high clock and zero wait states DRAM accesses the card performed almost 3 times as fast as the Microsoft SoftCard. The GZ/80-B00 is a new implementation of the PCPI card with a 20MHz Z-80 CPU and 512KB of static RAM.

Filed under: 
Retrocomputing
Apple

GTERM25 - DB25 Active SCSI Terminator with diagnostics LEDs

Submitted by GG on Sun, 02/16/2020 - 15:28

GTERMActive termination is required to get newer high performance drives working on vintage computers. Unfortunately both the Amiga and older Apple computers use a DB25 SCSI connector which makes finding a suitable terminator quite difficult. GTERM25 solves this problem providing a high performance active terminator with a DB25 connector and SCSI diagnostic LEDs.

Filed under: 
Retrocomputing
Apple
Amiga

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

GGLABS Terminal V0.12f

Submitted by GG on Tue, 12/17/2019 - 18:27

A new version of GTERM is available here

GTERMGTERM is a newly developed VT100 terminal emulator for the Commodore 64. GTERM supports the GLINK232/swiftlink and the GLINK232T/Turbo232 UART cartridges. It features a custom monochrome software 80 columns display and supports serial speeds up to 115200 bauds on a stock c64.

Filed under: 
Retrocomputing
C64

Pages