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Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... way to disable all onboard memory - like ROMCS but for the ... whole memory map?
Translating the ... piece of on-board memory and map external memory over it. CP/M ... -
Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …
This is external memory upgrade for ZX Spectrum ... this upgrade:
+ connect external memory to adress space 32768-65535 ... /> + switch for enable/disable extra memory (128kB / 1MB)
+ possibility ... . ZX128
[B]+ all external ram pages are fast (ULA ... -
SimCoupe 1.0 released[size=-2](for those of you that don't read CSS)[/size] SimCoupe, the SAM Coup? emulator, has been updated to version 1.0. This major release adds ma…
... support for ZX82 and gzipped external ROM images
- Added built ... undocumented flags
- Fixed ROM memory accesses to be uncontended [Dave ... Legend of Eshan
- Fixed external memory ports to be write-only ... -
Spectrum clone system that can run game imagesI was wondering... Is there a spectrum clone in the market (that I could buy) that can accept any type of external memory (eg USBdrive,IDE,SD cards …
... can accept any type of external memory (eg USBdrive,IDE,SD cards ... -
Dangerous Allram Mode On +2a / +3ZX Spectrum 128+2A and +3 support allram feature on port 1FFD. On this ZX models is very dangerous set allram if is connect any interface with extern…
... is connect any interface with external memory. For example: interface DIVIDE ... or DIVIDE+ connect external memory if CPU jump to any ... ZX bus and connect external memory rom/ram to data ... ram data will collide with external memory = computer or DIVIDE (or ... -
External memory upgrade for ZX16/48[url]http://velesoft.speccy.cz/zx/external_128kb_upgrade/index.htm[/url]
[url]http://velesoft.speccy.cz/zx/external_128kb_upgrade/index.htm[/url] -
converting ZX128 software for SAM COUPESAM COUPE is computer compatible with ZX48 model. Use same ports, same keyboard with compatible membrane, 64kB adress space with possibility connect …
... very very easy. 1MB external memory for SAM COUPE enable also ... ZX color palette , enable external memory in high 32kB, set port ...
Additional info about 1MB memory and AY ports:
- converted ... for ZX clones with extended memory support. (software for ... -
DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…
... is disabled for external devices (only DIVIDE PLUS use external memory)
external device can't disable ZX ... replace ZX rom with extra memory pages)
[B]- ... as data protector only = external device can't collide on ... -
More from Timex Computer corp. (U.S.A.)I'm hoping this will be of interest to some of you. Bruno: For many years we've been told a 48K Spectrum had been modified to work with NTSC but did…
... would be connected to extra external memory? It was to be called ... -
New ZX Spectrum hardware with ArduinoHi to all. I've found this on youtube. [url]http://www.youtube.com/watch?v=OMHHiOsMQu0[/url] Which other adapter/ peripherals are possible to creat…
... /> I was dreaming of a external memory interface :D -
DIVIDE versus ZX128 ROMDivide interface use hardware mapping of extra memory on this fixed points in 48rom: #0000 - power-on/reset/rst0/software restart #0008 - syntax erro…
... problem in comaptibility with Divide memory. Big part of Divide ... mode (48basic with enable 128kB memory).
Divide ... on mapping points in external rom memory. Also exist next big ... Divide in same time connect external memory with system.
... -
Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…
... FDD interface with own external rom memory 16kB, based on FDC ... to adress #3D2F then external memory are connect and CPU read ... and connect from adress #66 external rom memory.
- From ZX ... bus devices with own external memory because this can collide ... -
Hardware description - DivIDE interface[B][U]DIVIDE interface / DivIDE 2k11[/U][/B] [B][U]The main description[/U][/B] DIVIDE is IDE interface with own external memory. Thanks to very goo…
... interface with own external memory. Thanks to very good memory mapping system ... read first instruction byte from external memory, disconnect external memory(connect original ZX rom ... #1FF8 of divide memory (DIVIDE not disconnect external memory at same adress, ... -
Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…
... />
MF3 is external interface designed specially for ZX ... MAGIC button for jump to external memory. MF3 contain 16kB rom ... MAGIC button and connect external MF3 memory and CPU continue ... instruction disconnect MF3 memory(yes, disable MF3 memory. This ports ... -
New MEMFACE projectMEMFACE is my old project, but never finished. Now is PCB done (at the post office) and I write firmware for CPLD. MEMFACE is interface with external…
... MEMFACE is interface with external memory flash eprom 512kB and sram ... /> - can connect own external ZX48/128/+3 rom (may ... 3 allram mode)
- external rom can full replace internal ... etc...)
- can disable external memory on next connected devices (next ... -
DIVMMC / DIVIDE and combination with next interfaces (compatibility)Very often we can read about problems of ports collision or incompatibility between devices. Here is way for identify devices compatible/usable with …
... combine more devices with extrenal memory on ZX bus. Then ... table all other devices with external memory and also other IDE devices ... which contain only interfaces without memory, removed ports of some ... IDE ports. Only two memory based devices are on begin ... -
AmericaI've been wondering, was the Spectrum released in America? Was it popular? Are there Spectrum games that were made in America? There must be a few A…
... concept of 3 64K internal memory banks -- the HOME bank ... supports an infinite expansion via external memory. The 48k Spectrum had ... BEU which would manage this external memory and allow up to ... Basic system enumerated the expansion memory and would use print#, ... -
Mayhem Accelerator in actionI've put together the first video of the prototype Mayhem Accelerator running on the Sam Coupe. The video shows the Sam running a ZX Speccy emulator …
... further 1-4 meg of 'external memory' is something I am still ... the Sam has really used external memory apart from Ram Disk support ... -
Any other real Spectrum users in the USA?Hi, I bought a Spectrum +2a off e-bay (I collect old computers) and managed to make it run here in the US. I'm curious; is anybody else running an a…
... 't have to strap the external memory adapter on it. I'll ... -
The best way for converting +D Snapskot > TZX fileI became some +D Disk images with 48K +D snapshots and I had no problems to load them with LOAD D1"XXXXX"S. But what's the best method to convert the…
... without trashing some part of memory. You always need to set ... aside some memory for the loader code itself ... utility will use the screen memory for that. The only real ... run the loader from an external memory bank that the game doesn ... -
Spritual successor to the Speccy1988-1995 - Atari ST/STe/Falcon 1995-2000 - ? hmmm ? 2000-2006 - Playstation 2 with a keyboard 2007- ?
... software support over the years - external memory, speech synth, other sound hardware ... -
Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…
... . They can also natively access external memory (in parallel, with a full ... bus so you need an external latch) unlike most microcontrollers - and ... -
Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... can let both internal and external memory get any /RAS signal - it ... 't chip select the memory on the external board.
Caveat ... -
Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... in (and instead, select your external memory on /CAS). The /RAS ... each row). The 4116 memory only reads or writes when ... need to still comply with memory timings for when /CAS ... the on-board lower memory. Note the 2 NAND ... when paging out lower memory is that all of ... -
Multi-tasking OS on the Spectrum?Do you think it is possible to build a multi-tasking operating system on the Spectrum? That is, most important the ability to have several task run…
... of address space, although with external memory, you can at least page ... -
Speccy LaptopHi, Since my subtle announcement in another thread was underwhelmingly too subtle, I'll repost it in a new thread ;) I have started work designing…
... like in-system programming or external memory designed for the PIC). The ... to keep up with Z80 memory or I/O bus cycles ... -
Speccy LaptopHi, Since my subtle announcement in another thread was underwhelmingly too subtle, I'll repost it in a new thread ;) I have started work designing…
... like in-system programming or external memory designed for the PIC). The ... to keep up with Z80 memory or I/O bus cycles ... -
MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…
... plan new MEMORY MANAGER for all ZX interfaces with external memory...
FAST and SLOW .TAP loading in RESIDOSWhy is in RESIDOS this TAP file loaded always too slow ? (with lines in border area). Other TAP files on my drive is fast loaded, but loading this fi…
... can in ROM area disconnect external memory and use original ZX rom ... at begin of all RESIDOS memory pages insert switch to correct ...FAST and SLOW .TAP loading in RESIDOSWhy is in RESIDOS this TAP file loaded always too slow ? (with lines in border area). Other TAP files on my drive is fast loaded, but loading this fi…
... can in ROM area disconnect external memory and use original ZX rom ... at begin of all RESIDOS memory pages insert switch to correct ...
