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Phasor Manual 2024 revised edition

Submitted by Khaibitgfx on October 4, 2024 - 3:29pm

Phasor_Manual_2024.pdf

Tags: 
Manual

Some synchronous nibble captures

Submitted by S.Elliott on August 29, 2024 - 1:25pm

This blogpost is a quick data dump of raw Disk II data, captured synchronously at intervals of exactly 8 CPU cycles.

Picture 1: Synchronous capture of 10-bit sync nibbles and 8-bit address-mark nibbles

Tags: 
diskOscope hardware

Sirius Printware

Submitted by Khaibitgfx on August 2, 2024 - 12:29pm

News of my death has been greatly exaggerated so without further adieu...

 

Sirius Software - Printware.pdf

Tags: 
Sirius
games
diskette

A2DVI: Apple II Digital Video Card

Submitted by MacFly on July 11, 2024 - 3:28pm

A2DVI_Title.jpg

Video cards for the Apple II based on the PICO microcontroller are popular for a while now. They are cheap, consume very little power, and fit on a simple Apple II slot card. And they connect Apple IIs to modern displays. However, digital displays have conquered the world: their analog predecessors long since became retro devices themselves. Nowadays even analog VGA inputs are becoming rare. Which leads to the question: couldn't we make a PICO-based graphics card for the Apple II with a digital output instead? Use HDMI to replace the VGA connector? No more analog signal conversion required?

Spoiler: yes, we can! :)

Tags: 
#apple2 #retro #hdmi

Enterprise_B

Submitted by doug-doug the mighty on July 5, 2024 - 11:19pm

Type : Early 2004 iBook G4 14” (PowerBook6,5)

Processor : 1.2 GHz PPC 7447a (G4)

OS : 10.5.9 (Sorbet)

RAM : 1.25 GB DDR SDRAM

Graphics: ATI Mobility Radeon 9200

INFOCOM Spellbreaker

Submitted by Khaibitgfx on April 3, 2024 - 4:10pm

Infocom Printware - Spellbreaker.pdf

WIP: Tape Port Test patterns

Submitted by S.Elliott on March 28, 2024 - 4:42pm

Synopsis: an information-capture for work-in-progress

The Apple cassette save routines use the Y register to determine the pulse-width between signal edges, and there are seven distinct values for the Y parameter depending upon the context and state of the save routine.  For the purposes of studying the cassette routines, I named each parameter for its default value and tested their limits:

Tags: 
tape

A2USB: Apple II USB & Mouse Interface Card Emulation

Submitted by MacFly on January 1, 2024 - 10:19am

A2USB_Main2.jpg

What does an Apple II VGA Card, a Z80-CPM SoftCard and an USB-Apple II Mouse Interface Card have in common? Well, almost everything. All three are the same card. Same hardware. Just differing software. The magic of software-defined hardware. It can emulate many things. It just depends on software.

I started a project to add USB support to the Apple II - extending the PICO-based Apple2 VGA cards. The cards are based on excellent work by Mark Aikens, David Kuder and others. The hardware is using the surprisingly powerful and flexible PICO microcontroller. The first and most obvious application of the A2USB project is a complete Apple II Mouse Interface Card emulation, supporting a USB mouse.

Tags: 
#hardware #usb #apple

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