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R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…
... lower portion of the address bus along with a refresh control ... is dumped on the address bus lower byte, just after fetch ... -
SLOMO with K-MOUSE2016-LPI plan make new batch of K-MOUSE2016LP interface. More info here: [url="http://www.worldofspectrum.org/forums/discussion/51912/new-k-mouse-2016-lp#l…
... board with 3 through zx bus connectors and without k-mouse ... -
An odd floating point error. Avoid!While working on the revival of my old game ([url="http://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992…
While working on the revival of my old game ([url="http://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992"]here[/url]), I stumbled across this odd BASIC behavior:
[code]10 LET a=2
20 LET a=a ... -
ZX Spectrum issue 4B acquiredI recently acquired a ZX Spectrum with serial number 138-363292 on the case, and a 1983 issue 4B board I got it for the purpose of repair. and have…
... leads has cracked, and the Bus Port contacts were a little ... myself.
As for the bus port, that was an easy ... -
Z88DK v1.99B ReleasedAt Sourceforge: https://sourceforge.net/projects/z88dk/ It's been a year since the last release so it was time for another. This is another tran…
At Sourceforge:
https://sourceforge.net/projects/z88dk/
It's been a year since the last release so it was time for another. This is another transitional release on the way to version 2.0 and hopefully we'll get there for the next one ... -
Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…
... converts the small integer into floating point form, thus ensuring that ... a USR call with a floating point number at the top ... well as small integers and floating point decimals, a slightly trickier ... -
Spectrum 48k Clock SpeedSo I was reading the [url="http://www.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum48K_ServiceManual.pdf"]Spectrum 48k Service Manaul[/u…
... ) and has a standard three bus input/output
arrangement. These ... are the Data Bus, Address Bus and Control
Bus respectively.[/i]
Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…
... CPU directly through the data bus. What pecies of hardware do ...What was your first job after leaving school?Just wondering what your first job was after finishing school? I left in 1990 and did a YTS scheme (remember them?) on spraying cars but i left afte…
... pay was £29.50 plus bus fare money. This went up ...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 …
... DIVIDE or DIVMMC on ZX bus.
We can't ... with extrenal memory on ZX bus. Then as first you must ... remove all devices without throught bus connector, because DIVIDE and DIVMMC ... with DIVIDE/DIVMMC to ZX bus and verify if are I ...
