Uh Oh.Electron inbound

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rubber_jonnie
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Re: Uh Oh.Electron inbound

Post by rubber_jonnie » Sat Jun 12, 2021 3:56 pm

stephen_usher wrote:
Sat Jun 12, 2021 3:53 pm
Yeah. It's always good to check. Maybe check what signals the RAM chip is getting from the ULA whilst you have the socket there and maybe buzz out the data path to the ULA. (Being paranoid.)
I already checked cas/ras and they were there, as was power. I may have also checked the address pins, but my memory escapes me. It often does these days.......

I need to try and make up a pinout diagram for the ULA as the pins, other than 1 on my glop top soldered in model, are not at all clear. I only know where pin 49 is as I checked the 16Mhz clock there.
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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Re: Uh Oh.Electron inbound

Post by stephen_usher » Sat Jun 12, 2021 4:50 pm

:dualthumbup:

What sort of memory does it use? 4x 4164 with multiplexing in the ULA?
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.

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rubber_jonnie
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Re: Uh Oh.Electron inbound

Post by rubber_jonnie » Sat Jun 12, 2021 6:05 pm

stephen_usher wrote:
Sat Jun 12, 2021 4:50 pm
:dualthumbup:

What sort of memory does it use? 4x 4164 with multiplexing in the ULA?
4x4864 or equivalent.
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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Re: Uh Oh.Electron inbound

Post by stephen_usher » Sat Jun 12, 2021 6:32 pm

Ah, so yes, 4164s. (HM4864 is the Hitachi designation. Same pin-out and functionality to the 4164.)
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.

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rubber_jonnie
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Re: Uh Oh.Electron inbound

Post by rubber_jonnie » Sat Jun 12, 2021 6:40 pm

stephen_usher wrote:
Sat Jun 12, 2021 6:32 pm
Ah, so yes, 4164s. (HM4864 is the Hitachi designation. Same pin-out and functionality to the 4164.)
And the OKI MSM3764 which is what I have coming. I probably have 4164s kicking around, but guess what? They are in storage....
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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arkadiusz.makarenko
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Re: Uh Oh.Electron inbound

Post by arkadiusz.makarenko » Sat Jun 12, 2021 9:31 pm

My plan for Sunday afternoon take out my Electron from storage and play some Citadel!
Do not trust people. They are capable of greatness.
~ Stanislaw Lem

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Re: Uh Oh.Electron inbound

Post by rubber_jonnie » Sun Jun 13, 2021 12:03 am

arkadiusz.makarenko wrote:
Sat Jun 12, 2021 9:31 pm
My plan for Sunday afternoon take out my Electron from storage and play some Citadel!
Had my BBC B out getting the hang of Mr Morleys 64K EEPROM adapter, nice and easy to use and I'll be ordering his sideways 32KB ROM/RAM adapter next.

Have fun with your Electron :)
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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Re: Uh Oh.Electron inbound

Post by stephen_usher » Mon Jun 14, 2021 8:27 pm

No sign of that memory chip yet then?
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.

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rubber_jonnie
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Re: Uh Oh.Electron inbound

Post by rubber_jonnie » Mon Jun 14, 2021 8:32 pm

stephen_usher wrote:
Mon Jun 14, 2021 8:27 pm
No sign of that memory chip yet then?
Sadly not :(

Delivery is showing as Wednesday, but is one of those daft untrackable Post Office numbers that only show collection and delivery, but nothing in between.
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

stephen_usher
Posts: 1879
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: Uh Oh.Electron inbound

Post by stephen_usher » Mon Jun 14, 2021 8:41 pm

Oh. That's annoying. In my experience they generally turn up a day earlier than the estimate, so probably tomorrow.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.

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