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80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... hard to have to swap memory banks to have a high ... as Timex was planning a external memory expansion (the Bus Expansion Unit ... RAM to steal from main memory the display. The Timex solution ... -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... . The BEU is an external memory banking scheme. The TS2068 has ... that can disable all internal memory. The BEU can accommodate ... mixture of external banks can exist in the 64k memory map ... the designer of the individual memory banks.
... -
Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... SAM COUPE only if 1MB external memory is connect...
[url ... on NMI only). On DIVIDE memory (or after modify messenger paging ... -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... presents a problem, because the memory in the lower 16K of ... paged out by external devices, leading to the external memory fighting with what ... -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... presents a problem, because the memory in the lower 16K of ... paged out by external devices, leading to the external memory fighting with what ... -
IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…
... used as a pointer to external memory.[/quote]
(I presume that ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... a nice 2^n memory matrix like external memory. There may be some ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... -ons which have their own external memory". Looking at some schematics and ... was done to prevent an external device from paging in an ... external ROM and therefore having to ... and disable its own internal memory if another device behind it ... -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... ]
This is impossible. External memory can't contain videoram. This ... -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
[QUOTE=velesoft;674492]This is impossible. External memory can't contain videoram.[/QUOTE]
well it [I]can[/I]...
it just has to contain the video generation circuits (ULA + PAL generation) too :p
;) -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... />
If you connect this external memory upgrade to ZX with 48kB ... between internal dram chips and external sram chip. Both chips can ... -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... original ZX Spectrum 16kB then external memory upgrade is full usable without ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... for automatic connection external memory
- cpu continue in external divide memory
- ...
- CPU disconnect divide memory and jump to detection routine ... zx rom, connect divide memory and return to system value ... same time here connect external ram. -
Beta diskJust something that's been bugging me for a while, is the 128k beta disk interface wired differently to the beta 48k as a piece of hardware, or as I …
... different rom adress for connect external memory. TR-DOS are connect if ... -
maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
... page an infinite amount of memory, limited only by the paging ... order address lines for your external memory.
You OUT 8 ... -
maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
... page an infinite amount of memory, limited only by the paging ... order address lines for your external memory.
You OUT 8 ...Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…
... are incompatible with:
- external keyboard interfaces (or keyboad based ... SINCLAIR2, CURSOR, etc...)
- external interfaces with external memory designed for orig ZX48 ... via resistors and external data 1:1 with external CPU. External device will ...48k+MF1+plusD problemThis is annoying, the setup I want to use is a rubber 48k, Multiface 1 (mainly because of the joystick port) and a +D, however, the NMI doesnt bring …
... external memory. Both your devices use own external memory and both devices can this memory ...ZX-Spectrum 16KWanted working 16K machine for reasonable price I'm located in NY, U.S.A. Thanks!
What is your price?
P.S. Yes, I have some project in mind :)
I want to build external memory extender with some additional features ;)New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... for make own joystick interface, external memory, k-mouse, etc...
[img ...DivIDE black editions availableI have about 6 more DivIDE black editions ready, and will finish more this week. [B]DivIDE 57c BLACK edition including ESXDOS 0.8.5 and 1GB CF card[…
... about PLUS D interface ?
- memory layout (I know only about ... rom can be replaced with external memory 8kB rom + 8kB ram = very ... similar as DIVIDE)
- memory paging (I need know mechanism ...DivIDE black editions availableI have about 6 more DivIDE black editions ready, and will finish more this week. [B]DivIDE 57c BLACK edition including ESXDOS 0.8.5 and 1GB CF card[…
... D memory layout is always:
0-8191 = 8kB external rom ... = 8kB external ram.
If PLUS D memory is connect ... DIVIDE (this disable automatic divide memory connection). PLUS D rom ... only as I/O ports (external memory access is ignored). Then PLUS ...Hardware description - PLUS D interfaceThis new thread will contain onformations of different ZX devices. Some devices contain manuals, schematics or firmware for some chips, but some peop…
... (from same adress is connect external memory):
- #08 (rst8 = syntax ... layout:
0-8191 = 8kB external rom
8192-16383 = ... 8kB external ram.
If PLUS D memory is connect ... [/B] = disconnect PLUS D memory
(addressing of port ...Hardware description - PLUS D interfaceThis new thread will contain onformations of different ZX devices. Some devices contain manuals, schematics or firmware for some chips, but some peop…
... .oe = vcc
; disconnect external memory after OUT x110011x,anyvalue (#E7 ... )
; or connect external memory if CPU read instruction byte ... oe = vcc
; after memory connection is from #0000-#1FFF ... possibility connect PLUS D memory after read port #E7 ...Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …
... / log.1 enable writing to external memory
D6 - log.1=connect ... =0 and D6=0 then external memory is disconnect and ZX rom ... .
- OUT 23,0 - disable external memory and connect ZX rom
DivIDE+ with SpectranetHi all, I've recently bought both a DivIDE+ and Spectranet from RWAP and I was wondering if it's possible to use them both together. I have a 48K+,…
... . This modification disable any other external memory access and all next devices ... only as I/O ports (external memory in spectranet is disabled).
memory paging as original DIVIDE and ...Didaktik Gama and M manualsI?m looking for manuals for the Czech Spectrum clones Didaktik Gama and M. Thought this would be an easy task, but I couldn?t find any user or servic…
... (without any internal modifications) via external memory upgrade to 100% compatibility with ...New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... is connect ZX ram and external ROMOE1 and ROMOE2 signals are ... But old ZX devices with external rom can't know if ... 0 can connect external memory and data collide between external device and +3ULA ... for +3 allram memory and data from external device can be ignored ...New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... is connect ZX ram and external ROMOE1 and ROMOE2 signals are ... But old ZX devices with external rom can't know if ... 0 can connect external memory and data collide between external device and +3ULA ... for +3 allram memory and data from external device can be ignored ...
