Ferranti ULA 5C114E info?
Ferranti ULA 5C114E info?
Hi. I came across all this Ferranti ULA 5C114E dated 8344..
The last model released by Czerweny was the "CZ Spectrum Plus" wich had the same keyboard as de 48+ and I think the rom was that of the "Spectrum" by Investronica in Spain..
Would it be safe to test one of these ULA on my CZ spectrum clones? (I don't have any of these last plus models)
These are related to de Czerweny Factory that made several spectrum clones at that time. First ones named CZ2000 had an ISSUE 6A board. Later "CZ Spectrum" model had a different case with same keyboard and rubber membrane and a slightly modified board (low ram only uses +5v, it had two joystick ports and a reset button, rom was not modified). But mine at least had the comon ULA 60001E-7 type.
On Google I only found that this ULA model was found on a rare NTSC Spectrum from Chile. But here we have PAL-N TV broadcast.. The last model released by Czerweny was the "CZ Spectrum Plus" wich had the same keyboard as de 48+ and I think the rom was that of the "Spectrum" by Investronica in Spain..
Would it be safe to test one of these ULA on my CZ spectrum clones? (I don't have any of these last plus models)
Ernesto
ZX80 USA, ZX81UK, ZX Spectrum, ZX Spectrum+, ZX Spectrum 128+ UK, ZX Spectrum +2/A, Sinclair QL, CZ1000, CZ1500, CZ2000, CZ1000Plus, CZ1500Plus, CZ Spectrum, CZ Spectrum Plus, TK83, TK85, TK90X, TK95. TS2068. And more to come
ZX80 USA, ZX81UK, ZX Spectrum, ZX Spectrum+, ZX Spectrum 128+ UK, ZX Spectrum +2/A, Sinclair QL, CZ1000, CZ1500, CZ2000, CZ1000Plus, CZ1500Plus, CZ Spectrum, CZ Spectrum Plus, TK83, TK85, TK90X, TK95. TS2068. And more to come
Re: Ferranti ULA 5C114E info?
Hi,
Interesting findings. Anyway, in Europe PAL-B/G is used and its colour subcarrier frequency is 4.43361875 MHz. In case of PAL-N, the colour subcarrier frequency is 3.58205625 MHz and a channel bandwidth of 6MHz. So, PAL-N spec is very close to the NTSC spec, and it might be a reason why Sinclair offered NTSC version of ULA in your part of the world.
Interesting findings. Anyway, in Europe PAL-B/G is used and its colour subcarrier frequency is 4.43361875 MHz. In case of PAL-N, the colour subcarrier frequency is 3.58205625 MHz and a channel bandwidth of 6MHz. So, PAL-N spec is very close to the NTSC spec, and it might be a reason why Sinclair offered NTSC version of ULA in your part of the world.
Claudius
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- 1024MAK
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Re: Ferranti ULA 5C114E info?
Hmm
16K / 48K models
U.K. / Europe 50Hz PAL versions
All these versions produce a video signal with 312 lines per frame with a scan line time of 64us. The frame rate is 50Hz. PAL inverts the phase of the chrominance V component on alternative scan lines.
Note that the ULA outputs YUV video signals with the Y being inverted.
60Hz NTSC
16K / 48K models
U.K. / Europe 50Hz PAL versions
- ULA 5C102E - used on issue 1 and some issue 2 boards. Needs the “dead cockroach”. Although not known at the time of the production of the issue 1 boards, the “spider” modification is also needed.
- ULA 5C112E - used on issue 2 boards. Needs the “spider” modification.
- ULA 6C001E-6 - used on issue 3 boards. The PCB incorporates the “spider” circuitry as standard.
- ULA 6C001E-7 - used on issue 4 boards to issue 6A boards. Backwards compatible for use on earlier boards.
All these versions produce a video signal with 312 lines per frame with a scan line time of 64us. The frame rate is 50Hz. PAL inverts the phase of the chrominance V component on alternative scan lines.
Note that the ULA outputs YUV video signals with the Y being inverted.
60Hz NTSC
- ULA 6C011E-3 - used in machines sold in Chile, South America. The Master clock crystal is 14.11MHz. This version produces 264 lines per frame with scan line time of 63.5us. The frame rate is 59.65Hz.
With this colour system, there is no need to invert the phase of the chrominance V component on alternative scan lines, hence this feature is disabled.
- ULA 5C114E - suspected to be NTSC / 60Hz but not confirmed by any second source (for the first source, see here and here)
- ULA 7K010E-5 - used in the ZX Spectrum 128 and +2 (grey)
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Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
- 1024MAK
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Re: Ferranti ULA 5C114E info?
See here.
So going on that, I don’t think you will do any damage. But the 5C ULA chips have less compatible DRAM timing compared to the 6C001E-7. And you say that the board that you have is based on an issue 6A (which over here uses a 6C001E-7). So as well as a NTSC video display (which will not be quite right due to the ULA clock speed being slightly out and a PAL colour encoder being used), the ‘lower’ DRAM may not be happy with the sub-standard control and address timing.
Be fun though
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
- 1024MAK
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Re: Ferranti ULA 5C114E info?
The U.K. used ITU system I-PAL (ITU standard here) which is very similar, it just has a slightly wider bandwidth and a different off-set carrier frequency for the audio sound channel.
The colour subcarrier frequency is a function of the LM1889 colour encoder in the 16K/48K systems. If 625 line / 50Hz timing and PAL colour is needed, a PAL ULA must be used.
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
Re: Ferranti ULA 5C114E info?
These are new old stock from the CZERWENY Factory in Argentina.. they never made NTSC computers...(mines are all PAL-N) they had a fire that put them down and then another firm took the leftovers and made some machines but there's a black hole in the history there.. Chilean NTSC Spectrum were not made here (as far as I know) they weren't very common... could be a missed proyect.(?)..1024MAK wrote: ↑Thu Jul 30, 2020 1:37 pmSee here.
So going on that, I don’t think you will do any damage. But the 5C ULA chips have less compatible DRAM timing compared to the 6C001E-7. And you say that the board that you have is based on an issue 6A (which over here uses a 6C001E-7). So as well as a NTSC video display (which will not be quite right due to the ULA clock speed being slightly out and a PAL colour encoder being used), the ‘lower’ DRAM may not be happy with the sub-standard control and address timing.
Be fun though
Mark
Ernesto
ZX80 USA, ZX81UK, ZX Spectrum, ZX Spectrum+, ZX Spectrum 128+ UK, ZX Spectrum +2/A, Sinclair QL, CZ1000, CZ1500, CZ2000, CZ1000Plus, CZ1500Plus, CZ Spectrum, CZ Spectrum Plus, TK83, TK85, TK90X, TK95. TS2068. And more to come
ZX80 USA, ZX81UK, ZX Spectrum, ZX Spectrum+, ZX Spectrum 128+ UK, ZX Spectrum +2/A, Sinclair QL, CZ1000, CZ1500, CZ2000, CZ1000Plus, CZ1500Plus, CZ Spectrum, CZ Spectrum Plus, TK83, TK85, TK90X, TK95. TS2068. And more to come
- 1024MAK
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Re: Ferranti ULA 5C114E info?
Well, the information that the 5C114E comes from only a single source. So it’s possible that the 5C114E Has PAL timing.
Until someone conducts a new test using a 5C114E, it’s all just speculation...
Mark
Until someone conducts a new test using a 5C114E, it’s all just speculation...
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
- 1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
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Re: Ferranti ULA 5C114E info?
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
Re: Ferranti ULA 5C114E info?
I followed that post but couldn't find the test they used.. there lost of broken links..
I will test one of then on my machines.. that have PAL crystals but may be thebTV can see something on RFvor on composite..
If you konw any test to perform or how to see how many lines per frame is it generating or fps please let me know
I could get an oscilloscope to test the output too..
Ernesto
ZX80 USA, ZX81UK, ZX Spectrum, ZX Spectrum+, ZX Spectrum 128+ UK, ZX Spectrum +2/A, Sinclair QL, CZ1000, CZ1500, CZ2000, CZ1000Plus, CZ1500Plus, CZ Spectrum, CZ Spectrum Plus, TK83, TK85, TK90X, TK95. TS2068. And more to come
ZX80 USA, ZX81UK, ZX Spectrum, ZX Spectrum+, ZX Spectrum 128+ UK, ZX Spectrum +2/A, Sinclair QL, CZ1000, CZ1500, CZ2000, CZ1000Plus, CZ1500Plus, CZ Spectrum, CZ Spectrum Plus, TK83, TK85, TK90X, TK95. TS2068. And more to come
- 1024MAK
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Re: Ferranti ULA 5C114E info?
Unfortunately with forums that don’t allow uploads/attachments, it’s inevitable that there will be broken links all over the place. The broken link to the photo of the board that presumably is/was fitted with a 5C114E is also really frustrating.
Mark
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.