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The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... even the +2, but the +2A and the +3 as I ... even available on the expansion bus, so I doubt that the ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... the ALLRAM mode of the +2A/+3, or if some ... s a read or write bus cycle. As you are ... generating write bus cycles to each and every ... happens, the ROM data bus colides with the Z80 data ... like that will introduce a bus colission with every data line ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... separated inputs, form the address bus contents.
Then, ... high. Then the address bus content fetching is initiated while ... that time, the address bus contents are not available. The ... That's the advantage. No floating wires, except those for the ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... separated inputs, form the address bus contents.[/QUOTE]
bus (or part of it) ... that time, the address bus contents are not available. ... complete 16 bit address bus to the ULA, and ... [/B]sive number of floating wires crossing here and ... -
Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... signal IORQGE models +3 and +2a,b, can be corrected using ... fail to see how a bus design which isn't compatible ... -
Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…
... know level, or are some floating?[/QUOTE]
Original old ... -D7 is here unused = floating.
Modern ZX clones ... and D5-D7 are unused/floating - see design of ... ][*]Do they all use bus mice with a 9 ... ST, Amiga and BBC Micro bus mice)?[/QUOTE]
Russian ... -
Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... put IORQGE on the rear bus. I realized this while testing ... IORQGE on 128K heatsink and +2A/+3 prior to use this ... direct link inside the text. +2A/+3 is not difficult, as ... -
Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... put IORQGE on the rear bus. I realized this while testing ... IORQGE on 128K heatsink and +2A/+3 prior to use this ... direct link inside the text. +2A/+3 is not difficult, as ... -
Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
... , only russian ZX clones. ZX128+2A/+3 models ignore reading of ... IN 7FFD return to data bus true value of port 7FFD ... -
DIVide interface.So I picked up one of these fancy DIVide jobbies from ebay. This one was from a chap in Germany. Alas it came without any instructions, and after s…
... joy interface connected to data bus on divide PCB (instead resistor ... is bad, data from ZX bus are not boosted and your ... (on ZX Spectrum models). ZX128+2A/+3 can work more stable ...
