Make this my favourite Sinclair ZX Spectrum Pentagon 128 AY-3-8910 & SRAM 512kb PCB

Category:
Retro Computers >> Sinclair >> Sinclair ZX Spectrum >> Hardware >> General / Add-Ons
Listing type:
Fixed Price Multiple Items
Item Condition:
New
Seller location:
Khabarovsk, Khabarovskiy kray, Russian Federation
Ending in:
18 days, 04h:36m:06s
Quantity Available
5
Fixed price:
US$50.00 Buy now!
VAT, Duty and handling fees may be payable on Price & Shipping on receipt
Shipping Costs:
From only US$12.00
Payment methods:
Paypal
Number Sold:
0 (View history)

Item Number : 39951

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Fixed price: US$50.00
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Description

1.
ZX Spectrum Pentagon 128Kb AY - Modified Board of a popular retrocomputer Zx Spectrum Pentagon 128. There is a place to install a molex connector to power the computer from a modern power supply unit from a PC.
Onboard there is a built-in music processor, as well as 2 connectors for a modern drive and a molex power connector. There is also a place to install a molex connector to power the computer from a modern power supply unit from a PC
The diameter of vias is reduced to 0.4 mm and hidden under the mask
Integrated AY-3-8910.
Integrated port Kempston.
Added block capacitors in SMD version on the back of the board.
The printer's ROM has been converted to a test one, with the main ROM being switched by a jumper that is located near the drive connector.
Rewriting resistive assembly on the processor data bus with a + 5V pin on the edge, not on the center.
Added screen for quartz 8 MHz.
Improved power bus.
Added mounting holes.
Unconnected inputs of microcircuits are pulled up to + 5V.
PCB covered with blue solder mask and silk-screen printing
Added mounting field to install molex type connector for floppy disk power supply
Added pins for installing SMD tantalum capacitors on the power bus
Added pins for installing SMD components instead of pinouts
etc

2.

512 KB SRAM for Pentagon 128 (expandable memory)

SRAM 512 module board for memory expansion of ZX Spectrum Pentagon 128 up to 512kb. One BS62LV4006 static memory chip is used instead of 16 RU5. The module is installed in the memory slots of your computer. Only the board is sold. There are 2 errors on the board - 2 contacts are covered with a mask, the mask must be removed and the holes drilled with a 0.8mm drill

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  • Sinclair ZX Spectrum Pentagon 128 AY-3-8910 & SRAM 512kb PCB

Questions and Answers

Shipping and Payment

Item Location:
Khabarovsk, Khabarovskiy kray, Russian Federation
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To Russian Federation :
  • Second Class Signed For : US$12.00 For initial item, US$9.00 Per additional item
  • To EU :
  • Courier : US$34.90 For initial item, US$9.00 Per additional item
  • To Europe (Non EU) :
  • Courier : US$34.90 For initial item, US$9.00 Per additional item
  • To Americas (Non USA) :
  • Courier : US$34.90 For initial item, US$9.00 Per additional item
  • To Rest of World :
  • Courier : US$34.90 For initial item, US$9.00 Per additional item
  • To USA :
  • Courier : US$34.90 For initial item, US$9.00 Per additional item
Shipment terms:
Not specified
Payment methods:
Paypal

The seller accepts all responsibility for this listing

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