My PAL stimulator

If you’ve been following my blog, you’ll see that I’ve been reversing a Commodore Amiga SCSI HDD Expansion card called the Dataflyer. On that Dataflyer, there’s a PAL that handles address configuration (the latch), chip selects, and converting the 68000 signals to those the peripherals understand.

Commodore Amiga AutoConfig expansion card process

Since I’ve been reverse engineering a DataFlyer Plus HDD SCSI expansion card for the Commodore Amiga, I’ve needed to get a much better understanding of how the AutoConfig process works. I’m by far no expert on it, but I have learned a lot and wanted to share a couple logic analyzer traces of this occurring in the wild. The Commodore documentation refers to these expansion cards as PICs or Plug-in Cards.

August 12, 2022 - Amiwest 2022 updates

  • By: AmiWest
  • Posted on: 13 August 2022

Amiwest 2022 show updates: The reserverations page has been updated with details on the hotel, book now and save! The exhibit page has been updated with a new exhibitor for Amiwest 2022.

AmigaOS 4.1: Enhancer Software 2.2 Released!

Hi everyone, Version 2.2 of Enhancer Software from A-Eon Technology was released today! Please read on for the full press release as posted on Amigaworld.net: 9th August 2022A-EON Technology Ltd is pleased to celebrate six years of the Enhancer Software. by releasing version 2.2 The new update is available to all existing Version 2 users as […]

June 29, 2022 - AmiWest 2022 Banquet To Feature Tim Jenison!

  • By: AmiWest
  • Posted on: 29 July 2022

Tim Jenison, founder of NewTek, to be the featured presentor at Amiwest 2022 banquet. This will be Mr. Jenison's first appearance at an Amiwest show. We are opening up banquet ticket reservations and recommend anyone interested in attending to reserver their ticket today. Space will be limited!

July 24, 2022 - Amiwest 2022 progress report

  • By: AmiWest
  • Posted on: 29 July 2022

In honor of the 25th incarnation of Amiwest, the organizing team has been hard at work putting together an amazing show. Click read more to learn about the latest happenings at Amiwest and take our 2022 attendee survey.

Amiga 2000 Rebuild Project Part 1

 This month has been crazy busy for work, so I have not had as much time to work on my Amiga projects as I wanted. That said, I made some big progress this month on the rebuild of my Amiga 2000.

June 29, 2022 - AmiWest 2022 Banquet To Feature Tim Jenison!

  • By: AmiWest
  • Posted on: 11 July 2022

Tim Jenison, founder of NewTek, to be the featured presentor at Amiwest 2022 banquet. This will be Mr. Jenison's first appearance at an Amiwest show. We are opening up banquet ticket reservations and recommend anyone interested in attending to reserver their ticket today. Space will be limited!

Commodore 64: Playable Preview of QUOD INIT EXIT IIo

Hi everyone, Saimo of Retream has released a playable preview of QUOD INIT EXIT IIo! It is available for download at Retream here: https://retream.itch.io/quod-init-exit-iio QUOD INIT EXIT IIo is a platformer with original mechanics, a few puzzle elements and an unprecedented graphical engine that sports: huge 2048×864 pixels maps colorful high resolution background and sprites full […]

ProXima3 - Red Dwarf Star - Coming to the Vampire

 

Hi everyone,  

I am super excited to announce that "ProXima3 - Red Dwarf Star" will be coming to an Amiga Vampire/Apollo machine near you.  Features two player/split screen options

Both V4 and V2, With V4 providing extra features like stereo positioned audio, e.g. explosion sound positioning.

More info and sneak peak of the game dev in my discord and patreon blog :)

Dataflyer 500 reversed schematics are coming….

While trying to reverse the function of the Commodore Amiga Expansion Systems DataFlyer 500 BUSS PAL, I really needed to know what was connected to what. There are no, as far as I know(!!), schematics available for this board, so I thought I’d bring that to end.

I will be publishing schematics relatively soon once I’ve had some more time to double-check them.

Building a PAL reader for TL866A

So I’m in the process of trying to reverse engineer some custom PALs from a Commodore Amiga Dataflyer 500. It would be ideal to read those PALs directly, however I don’t have a compatible PAL reading solutions. I’ve found some online but they are easily $800-$1200. So someone on a previous blog post commented about a potential solution that works with the TL866A eeprom reader.

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