Beta disk 128 interface clone for any Sinclair ZX Spectrum
- Category:
- Retro Computers >> Sinclair >> Sinclair ZX Spectrum >> Hardware >> General / Add-Ons
- Listing type:
- Fixed Price Multiple Items
- Item Condition:
- New
- Seller location:
- Novosibirsk, Russian Federation
- Ending in:
- This listing is closed (20/03/2019)
Notify When Back in Stock - Quantity Available
- 0
- Latest buyer:
- e***a (16)
- Fixed price:
- $59.95 USD
- Shipping Costs:
- From only $7.00 USD
- Payment methods:
- Paypal
- Number Sold:
- 20 (View history)
Buyer Value Date and hour Quantity bought e***a (16) $59.95 USD 20/03/2019 20:17:59 1 g***6 (2) $59.95 USD 24/01/2019 22:51:56 1 d***v (3) $59.95 USD 27/04/2018 23:17:34 1 d***0 (11) $59.95 USD 20/04/2018 08:40:19 1 p***u (23) $59.95 USD 01/04/2018 18:56:36 1 c***m (1) $59.95 USD 07/12/2017 21:10:01 1 I***s (11) $59.95 USD 07/12/2017 13:02:17 1 T***x (5) $59.95 USD 18/10/2017 12:11:04 1 c***t (36) $59.95 USD 04/10/2017 21:02:46 1 j***y (4) $55.99 USD 16/05/2017 12:22:50 1 t***4 (4) $55.99 USD 14/04/2017 15:42:20 1 v***k (2) $55.99 USD 31/03/2017 00:43:17 1 G***l (1) $54.99 USD 16/12/2016 14:03:01 1 z***o (21) $54.99 USD 16/12/2016 10:55:20 1 m***1 (39) $54.99 USD 06/12/2016 13:55:39 1 V***A (1) $54.99 USD 07/11/2016 03:29:56 1 l***k (9) $54.99 USD 26/09/2016 20:59:46 1 Z***s (8) £39.99 24/06/2016 05:52:40 1 e***a (1) £39.99 18/04/2016 13:16:47 1 m***v (14) £39.99 15/04/2016 07:34:42 1
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e***a (16) | Was nice to make a deal with you. Thanks ! :) | 03/04/2019 13:52:13 |
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d***v (3) | Arrived, works. No problems. | 12/05/2018 16:53:38 |
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c***t (36) | Just perfect. Works great | 19/10/2017 13:14:43 |
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t***4 (4) | Swift Delivery great bit of kit | 28/04/2017 18:04:57 |
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z***o (21) | good hardware, fast delivered, nice contact, reliable | 14/01/2017 21:37:20 |
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V***A (1) | packaging, shipping and absolutely professional object.....G R E A T ! | 28/12/2016 16:34:59 |
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l***k (9) | Great seller. Item as described. Perfect communications. | 13/10/2016 20:21:10 |
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m***v (14) | Fast delivery & well packed. Everything as described. Thanks a lot and sorry for the delay to send the Feedback. | 31/05/2016 19:56:29 |
Item Number : 11503
Meet the seller
tetroid (325)
Feedback received in last 120 days :
309 times
- Positive: 307 (99%)
- Neutral: 2 (0%)
- Negative: 0 (0%)
Description
For sale Beta disk 128 interface ( BDI ) clone for any Sinclair ZX Spectrum
Features:
1. BDI can be connected to the following models with some individual limitations:
Sinclair ZX Spectrum 48K
Sinclair ZX Spectrum + 48K
Sinclair ZX Spectrum + 128K
Sinclair ZX 128K Spectrum +2 gray
Sinclair ZX 128K Spectrum +2A/2B
Sinclair ZX 128K Spectrum +3
Harlequin ZX Spectrum clone
2. The BDI can be configured for use with any models with the help of five DIP switches.
3. There is one button traditionally called MAGIC, also used for run the built in test.
4. The BDI contains an FDC chip ( FDC1793 / KR1818VG93 / MB8877A ).
5. The BDI 64 KB of ROM. If necessary, the internal ROM of the controller can substitute the ROM of the computer.
6. Two floppy disk drives are supported
Attaching the BDI
The BDI is inserted vertically into the ZX BUS connector.
ROM chip contain:
BASIC128 in the first quarter
It may contain any test for Spectrum that you like in the second quarter
BASIC48 in the third quarter
TR-DOS 5.04T in the fourth quarter
How to run the built-in test
The built-in test mentioned above is run in the following way:
Press the MAGIC button, hold it down and press the RESET button on the computer ( or turn it ON ). It is possible to exit the test mode only by pressing the RESET button on the computer.
The description of BDI switches
The BDI has a unit of five DIP switches (SW1 - SW5) and a jumper (JP1).
SW1
If it is ON, the ROM of the computer is substituted by the ROM built into the BDI.
If it is OFF, the native ROM of the computer is used.
SW2
It works only in the 48K mode. If it is ON, the computer is reset to TR-DOS. If it is OFF, the computer is reset to BASIC48.
SW3
If it is ON, the 48K model of the computer is used. The analysis of ports 7FFD and 1FFD is disabled.
If it is OFF, the 128K model of the computer is used.
SW4
If it is ON, the 128K model with a heat sink or the +2 gray model is used. The analysis of port 1FFD is disabled.
If it is OFF, the +2A/B (black) / +3 model is used
SW5
If it is ON, the BDI is disabled
If it is OFF, the BDI is enabled
Two pin jumper
Jumper should be removed for 48K models and inserted for +2A/+2B/+3 models.
It makes no difference for 128K models with a heat sink and for +2 gray models.
Using the BDI with a ZX Spectrum +3 computer
It is possible to work with the BDI in the full-featured mode only when the ROM of the computer is substituted with the ROM of the BDI (SW1 is ON).
In this case +3 ROM is switched off and +3 function and +3 disk drive dont support.
Postage with international tracking
Questions and Answers
-
Question: Hi, I can flah other TR-DOS versions? Thanks in advance.
Posted by m***v (14) - 17/04/2016 07:40:01Answer: Yes, you can flash other TR-DOS version by EEPROM programmer
-
Question: The interface is provided with a manual and ROM image file? Programming EEPROM Instructions?
Posted by m***v (14) - 15/04/2016 07:33:43Answer: Yes, munual included, but it it same as listing text. ROM includes TR-DOS, test and Basic 48/128. EPROM table is includes in manual, you can programm EPROM youself be EEPROM programmer.
-
Question: how write the test program on the rom?
Posted by d***e (6) - 07/02/2016 13:11:31Answer: ZX Diagnostics 0.32 is included. You can program BDI ROM ( W27C512 ) by EEPROM programmer.
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Question: can the BDI works with Just Speccy 128k?
Posted by d***e (6) - 07/02/2016 13:09:51Answer: I dont have Just Speccy 128 and I cant test. But I think BDI dont work on JS128, because of conflict with internal Kempston joystick interface.
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Shipping and Payment
- Item Location:
- Novosibirsk, Russian Federation
- Shipping conditions:
- Buyer pays shipping expenses
- Shipment fee:
-
- To EU :
- Surface Mail : $7.00 USD For initial item, $3.00 USD Per additional item
- To Rest of Europe :
- Surface Mail : $7.00 USD For initial item, $3.00 USD Per additional item
- To Americas :
- Surface Mail : $8.00 USD For initial item, $4.00 USD Per additional item
- To Rest of World :
- Surface Mail : $8.00 USD For initial item, $4.00 USD Per additional item
- Shipment terms:
- Dispatch within 5 days of receiving cleared payment
- Payment methods:
- Paypal
The seller accepts all responsibility for this listing
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