Make this my favourite PET 2001 Video Glitch Fix Board

Category:
Retro Computers >> Commodore >> Pet >> Hardware
Listing type:
Fixed Price Multiple Items
Item Condition:
New
Seller location:
Tynemouth, United Kingdom
Ending in:
5 days, 16h:54m:46s
Quantity Available
4
Latest buyer:
m***h (2)
Fixed price:
£25.00 Buy now!
20.00% VAT, Duty and handling fees may be payable on Price & Shipping on receipt
Shipping Costs:
From only £5.00
Payment methods:
Paypal
Number Sold:
1 (View history)
Buyer Value Date and hour Quantity bought
m***h (2) £25.00 29/03/2024  12:42:32 1

Item Number : 64262

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Fixed price: £25.00
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Description

This is a board which solves a problem sometimes seen on early model PETs, one of thin vertical lines appearing between some characters.

This can be seen most clearly as what appear to be spikes on top of one or both walls in 3D Monster Maze (https://tynemouth.itch.io/pet-3d-monster-maze) see photos for examples.

This fixes that issues by adding in a pixel clock synchronisation flip flop, so each pixel is samples in the middle and output. The output can only change ones per pixel clock, so the glitches are removed.

This replaces the 74LS08 chip in position E2 (next to the 6502). The original IC will need to be desoldered and a socket fitted (turned pin socket included). Desoldering on these boards is not for the faint hearted, it is very easy to lift tracks, so proceed with caution unless you are an experienced desolderer.

This is only suitable for the PET 2001 board, as shown in the photos. Not suitable for the 2001N or later.

If you have a PET ROM/RAM board installed, you will need to add an extra 40 pin IC socket into the stack to raise it sufficiently (not included).

This is for the assmebled unit only. No PET motherboards, PET ROM RAM boards or anything else is included.

More info on my blog:

http://blog.tynemouthsoftware.co.uk/2024/03/commodore-pet-2001-repair-part-3-video-glitch.html

Picture gallery

  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board
  • PET 2001 Video Glitch Fix Board

Questions and Answers

Shipping and Payment

Item Location:
Tynemouth, United Kingdom
Shipping conditions:
Buyer pays shipping expenses
Shipping Costs:
  • To United Kingdom :
  • First Class Post : £5.00 For initial item, £0.50 Per additional item
  • Special Delivery : £8.00 For initial item, £1.00 Per additional item
  • First Class Signed For : £6.00 For initial item, £0.50 Per additional item
  • To USA :
  • Intl Signed For : £15.00 For initial item, £5.00 Per additional item
Shipment terms:
Sent as large letter. Signed for or special delivery recommended.
International orders may be subject to delays and additional customs fees. Please be aware of this before purchasing.
Payment methods:
Paypal

The seller accepts all responsibility for this listing

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