A500 - resurrection or pit of despair?

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rubber_jonnie
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Re: A500 - resurrection or pit of despair?

Post by rubber_jonnie »

IIRC the green screen is a RAM issue, you probably want to drop a DiagROM in and see if it tells you anything.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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JezC
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Re: A500 - resurrection or pit of despair?

Post by JezC »

rubber_jonnie wrote: 07 Feb 2026 11:40 IIRC the green screen is a RAM issue, you probably want to drop a DiagROM in and see if it tells you anything.
Ok, thanks... will try to find a suitable EPROM...but I think I only have 27c256 & 27c4096 at the moment...
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rubber_jonnie
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Re: A500 - resurrection or pit of despair?

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JezC wrote: 07 Feb 2026 11:50
rubber_jonnie wrote: 07 Feb 2026 11:40 IIRC the green screen is a RAM issue, you probably want to drop a DiagROM in and see if it tells you anything.
Ok, thanks... will try to find a suitable EPROM...but I think I only have 27c256 & 27c4096 at the moment...
I'll have a look see if I have any, but I don't think I do. I used a Boo Bip 27C400 ROM Emulator as it can store multiple ROM images, however they aren't made anymore though this looks similar: Amiga ROM emulator
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: A500 - resurrection or pit of despair?

Post by JezC »

rubber_jonnie wrote: 07 Feb 2026 11:57 I'll have a look see if I have any, but I don't think I do. I used a Boo Bip 27C400 ROM Emulator as it can store multiple ROM images, however they aren't made anymore though this looks similar: Amiga ROM emulator
Yes, I missed out on those BooBip emulators...would have been handy for the BBC micros as well :roll:

I'll have a look at those as soon as I sort out some of my pension info...
:coffee:
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Re: A500 - resurrection or pit of despair?

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JezC wrote: 07 Feb 2026 12:47
rubber_jonnie wrote: 07 Feb 2026 11:57 I'll have a look see if I have any, but I don't think I do. I used a Boo Bip 27C400 ROM Emulator as it can store multiple ROM images, however they aren't made anymore though this looks similar: Amiga ROM emulator
Yes, I missed out on those BooBip emulators...would have been handy for the BBC micros as well :roll:

I'll have a look at those as soon as I sort out some of my pension info...
:coffee:
My A500 has a boobip in it but it's a little irrelevant bar the DiagROM now I have PiStorm. I also have some Boo Bip BBC ROMs, they are great. I'll have a look in my drawer later to see if I have any 27C400's and I can drop one in with the RAM/IDE upgrade.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: A500 - resurrection or pit of despair?

Post by JezC »

rubber_jonnie wrote: 07 Feb 2026 12:56 My A500 has a boobip in it but it's a little irrelevant bar the DiagROM now I have PiStorm. I also have some Boo Bip BBC ROMs, they are great. I'll have a look in my drawer later to see if I have any 27C400's and I can drop one in with the RAM/IDE upgrade.
Ok, great - thanks!

I've just PM'd you to check something... ;)
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Re: A500 - resurrection or pit of despair?

Post by rubber_jonnie »

As I mentioned in my reply to your latest PM I have a 27C400 that's new and unused, but it will need an eraser if you want to use it for other things.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: A500 - resurrection or pit of despair?

Post by JezC »

rubber_jonnie wrote: 07 Feb 2026 14:15 As I mentioned in my reply to your latest PM I have a 27C400 that's new and unused, but it will need an eraser if you want to use it for other things.
Yes, I do have a vintage UV eraser (back from the mid-80s when I was programming EPROMs for my original Beeb) so hopefully that will still work - and I have a few Hitachi 27C4096 EPROMs to erase too, so that would be good to sort out for both purposes!

Thanks again Jon!
:thumbup: :thanksblue:
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Re: A500 - resurrection or pit of despair?

Post by rubber_jonnie »

JezC wrote: 07 Feb 2026 14:22
rubber_jonnie wrote: 07 Feb 2026 14:15 As I mentioned in my reply to your latest PM I have a 27C400 that's new and unused, but it will need an eraser if you want to use it for other things.
Yes, I do have a vintage UV eraser (back from the mid-80s when I was programming EPROMs for my original Beeb) so hopefully that will still work - and I have a few Hitachi 27C4096 EPROMs to erase too, so that would be good to sort out for both purposes!

Thanks again Jon!
:thumbup: :thanksblue:
No worries, I will get your stuff packed and arrange for the postie to collect. I'll let you know when that's done.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: A500 - resurrection or pit of despair?

Post by JezC »

rubber_jonnie wrote: 07 Feb 2026 15:35 No worries, I will get your stuff packed and arrange for the postie to collect. I'll let you know when that's done.
Thanks!

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