Añadir a mis favoritos PET ROM RAM Replacement Board (large)

Computadoras Retras >> Commodore >> Pet >> Hardware
Tipo de anuncio:
Precio Fijo Cantidad Multiple
Item Condition:
Ubicación del vendedor:
Tynemouth, United Kingdom
Tiempo restante:
0 días, 07h:16m:10s
Cantidad disponible:
Último comprador:
a***s (1)
Precio fijo:
£90.00 ¡Cómpralo ya!
20.00% VAT, Duty and handling fees may be payable on Price & Shipping on receipt
Gastos de envío:
From only £5.00
Formas de pago:
Pay Pal
Cantidad vendida:
4 (Ver historial)
Comprador Precio Fecha y hora Cantidad comprada
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


tynemouthsw (99) User Offline

Contactar al vendedor
Añadir Vendedor a mis Favoritos
See Other Items

Ver tienda virtual Tynemouth Software

Precio fijo: £90.00
Watch Item


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:


Galería de imágenes

  • 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

Envío y Pago

Item Location:
Tynemouth, United Kingdom
Condiciones de envío:
Gastos de envío a cargo del comprador
Gastos de envío:
  • Para United Kingdom :
  • First Class Post : £5.00 Por artículo inicial, £0.50 Por artículos adicionales
  • Special Delivery : £8.00 Por artículo inicial, £1.00 Por artículos adicionales
  • First Class Signed For : £6.00 Por artículo inicial, £0.50 Por artículos adicionales
  • Para EU :
  • Intl Signed For : £15.00 Por artículo inicial, £5.00 Por artículos adicionales
  • Para USA :
  • Intl Signed For : £15.00 Por artículo inicial, £5.00 Por artículos adicionales
Condiciones de envío:
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 pago:
Pay Pal

The seller accepts all responsibility for this listing

Visitas: 3711