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SP1 and memoryWhile developing my program, I've run into memory related issues and haven't (yet) run into any advice over how SP1 uses memory. The examples all sb…
... impact from having it in contended memory ...yet - but quite a ... -
Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…
[QUOTE=mcleod_ideafix;568788]I cannot tell you from memory, but if IC6-IC13 belong to contended memory, then yes...[/QUOTE]
Sorry! I meant: NON contended memory. -
Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…
... [/url], IC6-IC13 is the contended RAM, and the one I ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... out which memory from the contended bank is damaged (and replacing ... the CPU, or the non contended RAM, as these devices share ... probably a chip in non contended RAM.
Do the ... probably), or faulty multiplexers. Non contended RAM is not directly connected ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... machine? Choosing pages 4-7 contended with the 128K's contention ... if you choose odd pages contended. I don't the decision ... about which pages are contended is one you should be ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... Amstrad changed which banks were contended to match the spec. So ... ? In which case, changing the contended banks - ala Amstrad - would change ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... Amstrad changed which banks were contended to match the spec. So ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
You could always have 5 and 7 contended and all the rest uncontended :-) -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... port ram and have nothing contended :D[/QUOTE]
That ... chips. No separate banks for contended and uncontended memory. You know ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... no separate memory banks for contended and uncontended memory. IN 255 ... -
Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…
... it in and out of contended memory on the 128K machines ... and run the routine in contended memory. It's not an ... -
Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…
... it in and out of contended memory on the 128K machines ... and run the routine in contended memory. It's not an ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... : a program running in contended memory, writting to contended memory (or at ... least, contended in the Sinclair Spectrum ... we calculated for a non contended behaviour.
The RAM ... -
ANN: Tipshop updated Saturday, 31 December 2011Saturday 31 December 2011 The last update of the year - Happy New Year when it comes! * GoodBoy sent in a cheat for Wacky Races. * Hippy Smith sen…
... relocating the game out of contended memory - nothing more, nothing less ... />
;move us out of contended memory
reloc:
LD ... -
Original Derby SpecificationI've scanned an original Derby specification, from Nov 1985, and uploaded it to my site - I think I acquired it during my fleeting association with M…
... think he was referring to contended pages... -
Original Derby SpecificationI've scanned an original Derby specification, from Nov 1985, and uploaded it to my site - I think I acquired it during my fleeting association with M…
[QUOTE=guesser;592476]I think he was referring to contended pages...[/QUOTE]
Maybe... Maybe... But by sheer coincidence paper pages 4-7 are missing too :-( -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... /> Won't the number of contended display accesses be the same ... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... /> Won't the number of contended display accesses be the same ... only has one of them contended while the other isn't ... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... /> Won't the number of contended display accesses be the same ... -
Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…
... did velesoft bother redesigning the contended memory layout on the +2 ... -
Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…
... sacrifice another 6K of the contended lower RAM for a choice ... -
Reported CPU speedThe original 16/48K spectrum is often reported as having a CPU at 3.54MHz. While watching Micro Men this evening (see approx 00:54:50), I wondered wh…
... whether or not there are contended accesses taking place. It makes ... -
New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…
... and 7(both videorams) are contended as on orig.ZX. All ... -
AY-interface for ZX81 (at last ;) )Hi, it exists finally ;) - compatible with the most standard one - ZonX. [url]http://www.sellmyretro.com/offer/details/Brand_New_Sinclair_ZX81_MrX_A…
... are usually placed in non-contended memory. I don't know ... if it even has non-contended memory!
Edit: Since ... -
AY-interface for ZX81 (at last ;) )Hi, it exists finally ;) - compatible with the most standard one - ZonX. [url]http://www.sellmyretro.com/offer/details/Brand_New_Sinclair_ZX81_MrX_A…
... are usually placed in non-contended memory. I don't know ... if it even has non-contended memory!
Edit: Since ... -
Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…
... - that's still running in contended memory :razz: -
Double Dragon Remake: The Development ThreadOk guy's, so this is the new thread that will be focusing on Jim Bagley's development of the Double Dragon remake that was first proposed by myself a…
... there's a list of contended and uncontended banks anywhere, but ... -
Double Dragon Remake: The Development ThreadOk guy's, so this is the new thread that will be focusing on Jim Bagley's development of the Double Dragon remake that was first proposed by myself a…
... there's a list of contended and uncontended banks anywhere, but ... -
Double Dragon Remake: The Development ThreadOk guy's, so this is the new thread that will be focusing on Jim Bagley's development of the Double Dragon remake that was first proposed by myself a…
... there's a list of contended and uncontended banks anywhere, but ... 3 5 and 7 are contended
+3 and black +2 ... 5 6 and 7 are contended
in other words ...