Faça a isto meu favorito PET ROM RAM Replacement Board (large)

Computadores Retros >> Commodore >> Pet >> Hardware
Listing type:
Fixed Price Multiple Items
Item Condition:
Localização do vendedor:
Tynemouth, United Kingdom
Ending in:
4 dias D, 18h: 46m: 05s
Quantity Available
Últimas comprador:
g***w (1)
Preço fixo:
£90.00 Compra agora!
VAT, Duty and handling fees may be payable on Price & Shipping on receipt
Shipping Costs:
From only £5.00
Formas de pagamento:
Pay Pal
Number Sold:
9 (Ver historial)
Vendedor Valor Data e hora Quantidade comprada
g***w (1) £90.00 30/05/2024  02:51:18 1
j***s (2) £90.00 05/04/2024  17:00:59 1
T***d (1) £90.00 13/03/2024  20:15:46 1
h***6 (2) £90.00 27/01/2024  12:07:02 1
H***s (2) £90.00 04/12/2023  19:17:21 1
a***s (1) £90.00 03/10/2023  11:08:05 1
c***6 (2) £90.00 24/09/2023  05:57:32 1
J***s (3) £90.00 21/07/2022  10:49:36 1
k***e (3) £90.00 01/07/2022  16:06:49 1
Feedback on this Item
PositivoPositivo J***s (3) Very happy with my purchases, many thanks! 25/07/2022  19:18:26

Item Number : 62176

Conheça este vendedor

tynemouthsw (111) User Offline

Contact the Seller
Add Seller To Favourites
See Other Items

Ver webstore Tynemouth Software

Preço fixo: £90.00
Watch Item

Descrição do ficheiro

This is a board which plugs into the 6502 CPU socket on a Commodore PET computer to replace the main system ROM or RAM.

It is compatible with the following machines

  • 9" PET - 2001, 2001N, 3008, 3016, 3032, 4008, 4016, 4032
  • 12" PET/CBM - 4016, 4032, 8032, 8032-SK

It can be used on CBM 8096 and 8096-SK, but the 64K board cannot be used, so it will revert to an 8032. It cannot be used on the CBM 8296 or any CBM-II series machines.

The video RAM and character ROM are not replaced as they are wired directly to the video circuitry.

The DIP switches can be used to turn on or off sections of the ROM and RAM replacement, and also to select the ROM set.

Switches 1 and 2 allow the lower 16K of RAM and  / or the upper 16K of RAM to be replaced

Switches 3 through 5 select which of the ROM chips are replaced (see attached PDF for more info)

There are 8 ROM sets, 4 of which are for the 9" PETs without CRTC chips

  • A simple RAM / character set tester
  • BASIC 1.0 
  • BASIC 2.0
  • BASIC 4.0

The other 4 ROM sets are for 12" PET / CBM models with 6545 CRTC

  • 40 column, normal keyboard, 50Hz
  • 40 column, normal keyboard, 60Hz
  • 80 column, business keyboard, 50Hz
  • 80 column, business keyboard, 60Hz

The BASIC 2.0 and 4.0 and CRTC ROM sets all include a DOS wedge to make accessing an IEEE-488 disk drive easier. BASIC 1.0 does not support IEEE-488 disk drives.

Only a 6502 CPU should be plugged into the socket on the ROM RAM board. 64K RAM boards, 6509 boards from the Super PET or other extensions are not supported.

This version is also useful for diagnosing ROM or RAM faults. See my other listings for a smaller version which is a fit and forget upgrade to the maximum RAM and latest ROMs.

More info on my blog:


Galeria de imagens

  • PET ROM RAM Replacement Board (large)
  • PET ROM RAM Replacement Board (large)
  • PET ROM RAM Replacement Board (large)
  • PET ROM RAM Replacement Board (large)
  • PET ROM RAM Replacement Board (large)
  • PET ROM RAM Replacement Board (large)

Questions and Answers

Shipping and Payment

Item Location:
Tynemouth, United Kingdom
Usuário desconhecido:
Os compradores pagam as despesas de envio
Shipping Costs:
  • PARA 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
  • PARA USA :
  • Intl Signed For : £15.00 For initial item, £5.00 Per additional item
Termos da expedição:
Sent as small parcel. Signed for or special delivery recommended.
International orders may be subject to delays and additional customs fees. Please be aware of this before purchasing.
Formas de pagamento:
Pay Pal

The seller accepts all responsibility for this listing

Exibição da página: 4600