My first Electron was purchased from a small shop in Glasgow in October 1987 for £40..I had just sold my
Sinclair QL, which paid for the Electron and part of a Pres +1/+3, my first of what turns out
to be one of many expansions. Not content with my lot, I saved up and bought a Pres +6 so I could have more Eprom programs at my finger tips and free up a cartridge slot on the Plus 1 for what was going to be my next expansion.. the Java Systems E2P, the Electron 2nd Processor. I purchased this as a circuit board and diagram Jaffa Systems, I assembled it myself and if I remember correctly it took some time to get the timing right for the refresh rates of the dynamic RAM. The E2P worked ok for about a year then it would occasionally fail to start. I spent some time trying to fix it but to no avail so the Slogger Master Ram Board was now on order.... With the MRB installed the Electron was once again stable and worked a treat. At this stage I wanted to have a go at the Slogger Stop Press (a conversion from the BBC AMX product). This required a User Port so it was off on the upgrade trail...I ordered the Slogger Plus 2, again as a circuit board and built it up from my own components. This was a great addon with two cartridge slots, more ROM/RAM sockets and of course the User Port. This board plugged into the Electron between the Plus 1 and the Electron itself. It did not have a case so there was no mechanical support and often worked loose..I then built it into a case which fixed both the Electron and Plus 1 to the Plus 2 improving reliability. After a while Slogger introduced his Stop Press 64 which used the capabilities of the MRBs' extra memory, it also had a User Port and additional ROM/RAM sockets so I sold the Plus 2 and bought the SP64. This made my Electron quite compact.. by now it had the following capabilities:
All possible ROM/RAM sockets available. Then came the greatest challenge... By now I was producing one or two little addons for the Electron, eg the ROM128 and a Battery Backed Ram Module for the Plus 6 & Plus 2 and was looking to move into the BBC Computer market so I started to look around for a BBC Master. I eventually bought one with a 40 Mb hard disk and IBM PC 2nd processor. It came with the circuit diagrams showing how to build the hard disk addon and plenty spares.. so I thought I'd have a go at fitting one to an Electron. The BBC HD required connection via a 1MHz bus, I knew Pres had produced one at one time so once again I watched the adds. Having collected everything I set to work on producing the.... Super Electron..../ Super Electron II is now under way..24/04/01
This is how it turned out..
PC mini tower case.
I wrote a couple of programs, Rsave and Rload to allow the saving and loading of ROM images in the
BBRAM, both were under 256 bytes and available on disk or ROM.
Internal BBRAM for Plus 6/Slogger Plus 2
Slogger Rombox and Rombox Plus
Electron Motherboard | Sinclair Spectrum 48K & +2 | Sinclair QL | Amstrad NC100 Notepad | Amstrad CPC464 | Softy | |