Just to verify before I burn the ROMs.... the Spectrum +2A/+2B/+3 physically have 2x 32k ROM chips, usually referred to as A and B. I know that they consist of 4 banks of 16k ROM data.
Am I right in thinking that ROM A contains 16k ROMs 0 and 1 (with 0 starting at the beginning and 1 in the 2nd half) and that for ROM B it's the same principle, with the first 16k space taken up by ROM 2 and the last 16k being ROM 3?
Thanks.
+2A ROMs 0 - 3 on 2x Eprom
+2A ROMs 0 - 3 on 2x Eprom
I'm Chris, a Brit in Germany (Chr$ on the QL forum). https:\\QXL.WIN < QL related collection.
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Re: +2A ROMs 0 - 3 on 2x Eprom
Here is the inside of a +2A currently awaiting attention. Looks like two ROMs.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
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Re: +2A ROMs 0 - 3 on 2x Eprom
Up close if required:
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: +2A ROMs 0 - 3 on 2x Eprom
Yes, thanks Lardo, I know that there are two but they come as 4x 16k, so just wanting to confirm the correct order that they get burnt onto the chips.
I'm Chris, a Brit in Germany (Chr$ on the QL forum). https:\\QXL.WIN < QL related collection.
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- Posts: 2169
- Joined: Sat Nov 26, 2016 2:42 am
Re: +2A ROMs 0 - 3 on 2x Eprom
Not sure if this is accurate:
https://packages.debian.org/jessie/spectrum-roms
And some disassemblies.
http://www.fruitcake.plus.com/Sinclair/ ... embly4.htm
https://packages.debian.org/jessie/spectrum-roms
And some disassemblies.
http://www.fruitcake.plus.com/Sinclair/ ... embly4.htm
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: +2A ROMs 0 - 3 on 2x Eprom
Just to make sure, I'm going to compare the ROM code of my original A&B to verify the 0-3 order.
I'm Chris, a Brit in Germany (Chr$ on the QL forum). https:\\QXL.WIN < QL related collection.