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Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…
Has anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful not having something dangling off the back of the Spectrum. -
ROM replacement using 28C256 EEPROMThought I'd share a quick project I knocked up in order to use a 28C256 EEPROM in place of the standard 23128 ROM in the Spectrum. The connections a…
... and 27 from the ROM socket on the board are ... to VCC on the EEPROM socket.
The ... plug into the board ROM socket, with a socket for the EEPROM ... to plug into the ROM socket and one to carry the ... the fitting of a ROM socket if not already present.< ... -
48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…
... a 16 pin ZIF socket in place of IC13 ... capacitor and the ZIF socket was in place, continuity ... switching, jumper wire from ROM socket pin 28 to pin ... />
Sanity check ROM burner (MQP Pinmaster 48) ... on a breadboard, soldered socket pins to appropriate places ... -
ZX 128 compatibility for SAM COUPEI develope new internal interface for SAM COUPE. This interface contain RTC compatible with original SAM BUS and MB02+, battery backed SRAM 512kB, 51…
Spectrum +2 EPROM in Spectrum +2AHi, My friend Marc bought a +2A from Tim Abbott at the Spectrum 30 event. Back in the day there were companies selling +2 ROMs to put into +2As to r…
... /> My questions:
Which ROM socket in the +2A would a ... +2 ROM go in?
... /> I'm guessing 128 editor ROM in the lower 16K (0 ... - 16383) and 48 ROM in the upper 16K (16384 ... know which of the two ROM sockets in the +2A to ...PCB for romselector for toastrack/grey +2 giveawayHi guys. I've tried my hand at hardware design, and to my great surprise, my very first design worked as expected... :razz: I wanted to be able to …
... eeprom in the onboard rom socket, so i went to ... br /> One 32 pin socket for the eeprom (if ... I recommend a turned pin socket.
One 74LS148 8 ... plug into the speccy's rom socket.
A jumperblock in ... /> 5. The spanish 128K rom translated to english
...Replacing +2/+3 rom with eeprom?Hi I want to change my +2a to +3e (or +2e). Garry mentions that 27C256 eprom can be used. I would like to use 28C256 instead. Pins are not all the s…
... . Insert it into the Speccy ROM socket so pins 1,2,31 ... and 32 arent in the socket. Attach a small piece of ...rom switchhow could one go about building a rom switch, to switch between +3 roms and +3e roms.
... two chips (out of the socket), stacked, pin for pin, on ... now goes back into the ROM socket on the PCB.
rom+switcher"]http://ftp.uni-paderborn ... .de/aminetbin/find?rom+switcher[/url]
filename ...Interface 1 Memory Map(I'm not sure which section this post should go in, but here seems as good as any) Since the Interface 1 ROM is only 8k long, does anyone know what …
... must admit, having the 8K ROM paged in at 0000h - 1FFFh ... if you connect an 8K ROM to a 16K address decoder ... (The normal ROM select). As an example, try ... plugging an 8K ROM into the Spectrums ROM socket - it will appear ...Timex-Sinclair 2068 mod?Just curious, is there any way that a Timex-Sinclair 2068 can be modded to function as a ZX Spectrum128? I'm considering getting one (since it's rat…
... is, how complex is a ROM mod?[/QUOTE]
rom is socketted, which means ... insert a 16kx8 rom containing a spectrum rom. A very ... EPROM to work in the ROM socket.
Rather ... than using a sinclair rom as image it might ...Timex-Sinclair 2068 mod?Just curious, is there any way that a Timex-Sinclair 2068 can be modded to function as a ZX Spectrum128? I'm considering getting one (since it's rat…
...
Replacing the HOME rom with an EPROM is very ... putting an EPROM into the ROM socket. It suggests cutting traces ... 't go into the socket) and solder fat solid ... other end into the socket where they should go ... in the original HOME rom should you ever want ...Replacement ROMsSo, I've replaced a couple ROMs in my +3 to be a +3e. I used a couple of 27c256's, which has worked a treat. So if I wanted to replace the ROMs in …
... plug into the Spectrum's ROM socket, such that I can use ... could use a 128Kbyte Flash ROM like the AMD AM29F010B and ...Replacement ROMsSo, I've replaced a couple ROMs in my +3 to be a +3e. I used a couple of 27c256's, which has worked a treat. So if I wanted to replace the ROMs in …
... But I did change the ROM in my clone to an ... a pin (bent off the ROM socket) and connecting it to + ... for EPROM and GND for ROM, IIRC.
The ... flash ROM is also a good one. ... switching software not residing in ROM), it would even be possible ...Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... years ago I changed Spectrum ROM with Eprom 27C128
and ... /> and plug into the original ROM socket. I also changed lower RAM ...Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... years ago I changed Spectrum ROM with Eprom 27C128
and ... /> and plug into the original ROM socket. I also changed lower RAM ...FAO Winston, Why won't this work?I have redesigned my Flash Rom board, yet again, so that it might perhaps work... any glaring flaws? [IMG]http://alistairsserver.no-ip.org/flash%20…
... so you get effectively two ROM sets (in two 64K ... OE lines from the ROM socket on the Spectrum directly ... Both OE outputs from the ROM sockets will be relatively high ... both OE lines from the ROM sockets, i.e. ... the Spectrum is not accessing ROM, are high, both Q3 ...FAO Winston, Why won't this work?I have redesigned my Flash Rom board, yet again, so that it might perhaps work... any glaring flaws? [IMG]http://alistairsserver.no-ip.org/flash%20…
... so you get effectively two ROM sets (in two 64K ... to switch between two rom sets, but that's ... OE lines from the ROM socket on the Spectrum directly ... Both OE outputs from the ROM sockets will be relatively high ... the Spectrum is not accessing ROM, are high, both ...Handling RST8 on a +3Well, I've come to that bit of my project that I wasn't really looking forward to (because I don't understand enough about the ZX BASIC ROM) - extend…
... future)
* Type of socket - SOCK_STREAM or SOCK_DGRAM (or SOCK_RAW ... only do so via the ROM socket library, or the code ... between a listening socket and the accepted socket when we get ... cover the entire socket library without requiring any ROM trapping, the ...Using a QLI have the opportunity to pick up a QL in distress, having never even set eyes on one before I am not sure how much fun there is to be had with them.…
Can do, its too small for a ROM socket, looks more like it would have held a TTL chip.
[img]http://i40.photobucket.com/albums/e230/Womble76/ql.jpg[/img]Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …
... /> The pins on the two rom chips are fine
Its ... mess? like puting A rom into B rom socket? I think I may ...Looking for some 48k RAM (upper 32k bank)Greetings, I was wondering where I could find some upper RAM for a 48k (issue 4A). It's the Texas Instruments TMS4532-20NL4 P8419 (or any compatib…
... top of the Spectrum's ROM.
[*]Re-wire memory decode ... soldered an SRAM to the ROM socket pins on the [B]underside ... it easier to replace the ROM). Unfortunately a 32Kx8 SRAM chip ...Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... by new one.
ROM socket placed and the SRAM changed ...Sam Coupe clonesAnybody know of any Sam Coupe clones? If they are available, are their any available to buy at the moment? Should of posted this in hardware. Sorry,…
... /> Notice their is a 32k ROM socket on the board (27C256). Is ... this for the MGT rom? If so, would it be ...Sam Coupe clonesAnybody know of any Sam Coupe clones? If they are available, are their any available to buy at the moment? Should of posted this in hardware. Sorry,…
[QUOTE=Hercules;548780]Notice their is a 32k ROM socket on the board (27C256). Is this for the MGT rom? If so, would it be legal to distribute it in silicon?[/QUOTE]I've got no idea as the sam coupe quite frankly is one of the last platforms I care about.Sam Coupe clonesAnybody know of any Sam Coupe clones? If they are available, are their any available to buy at the moment? Should of posted this in hardware. Sorry,…
... ]Notice their is a 32k ROM socket on the board (27C256). Is ... this for the MGT rom? If so, would it be ...Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…
... that plugs into the internal ROM socket instead of plugging onto the ...Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…
... that plugs into the internal ROM socket instead of plugging onto the ... ZX
1024kB ram - for rom emulation, ramdisc, divide memory, mb02 ... ram is used instead zx rom). Or you need write any ... . Profi interface use 32kB rom blocks (48 rom + 128 editor ). Both ...New DivIDEIs this the only place to obtain a new DivIDE? [url]http://www.lotharek.pl/product.php?pid=25[/url] Tried to purchase a device from there, but am g…
... rom socket can be connect very small PCB (rom socket to joystick connector adapter). Rom socket ... beginning. I would add 16k ROM (AllROM) mapping too.[/QUOTE]
ROM-elHi, I have a bunch of [URL="http://store.go4retro.com/products/ROM%252del-23128%7B47%7D23256-FLASH-ROM-Replacement.html"]these[/URL]. They are 23128…
... using this as a 16k rom you don't want to ... you A0-A13 on the rom socket.
If you want ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... options available around the IC ROM Socket for ?2-3 extra but ...
