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ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…
... them ASAP. Serverprogram, source and ROM-file.
... modified version of the 48 rom. If I used your ... replace only the last 16K of the +3 romset ... br /> eprom,including the 16K +3 ROM
(Who can tell ... interface uses a second ROM-bank to make a ... -
ZX-PC InterfaceRight - i'm 34 and I cant take the pain of waiting for tapes to load any more - somethings gotta give ( either the tape deck or me ). I've seen a 'Z…
... holds the modified 48K ROM. The interface disables the ... internal spectrum ROM and uses the one ... the interface disables the second ROM so (I think) ... first 16K and Dr BEEP's modified 48K ROM into ... the second 16K the +2A ... -
A Few QuestionsHi, can you help with a few questions. 1. On ebay you see a lot of rubber key spectrums. How can you tell the difference between a 16k and 48k machi…
... br /> A lot of 16K Spectrums were subsequently upgraded to ... compelling reason to buy the 16K, and no reason not ... Commodore C64 and left their 16K in the attic, but ... to downgrade the upgraded 16K machines back to their ... of the 48kb machine's ROM, but the part it ... -
dK'Tronics 4K Graphics ROMHi, I've got a working 4K graphics ROM fitted (today) in my ZX81 (yay!). I'd like to put a RAM chip (battery-backed) in the socket provided, howeve…
OK, here's my analysis of the board:
There are nine little holes in the board, which provide the links.
The board has a 74LS138 3-to-8 decoder and 74LS21 4-way AND gate.
The holes are connected as follows:
1 2 3 ... -
SoftRom emulation possible?Hello. Quick question to all emulator developers: How easy would it be to emulate a SoftRom? The mastering utilites for my protection system XLR-8 a…
... Specifics JUPITER ACE:
8K ROM
8K RAM
Z80 ...
I use 16K RAM for ROM and with an intruptroutine ... -
What do you think.Do you think if you went back in time and made a Sudoku game for the spectrum you would be a millionaire now? (all my get rich quick schemes invole …
... possible like 128K
32K ROM, 16K Spectrum + 16K ZX81
When ... -
Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... the pointer ploughing into the ROM. It never gets to 50549 ... pic). The program is in IM2 mode, as you can see ... you should investigate why the rom calls are occurring.
Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... call an address in the ROM area?
[/quote]
ROM area is an opportunity ...
These days the ROM is essential for the minigame ... , all very low in the ROM.
[/quote]
... emulator will be grabbing the IM2 routine address from.
Assistance with IM2 routineI subsequently got a working IM2 routine.
... , a possibility is that your IM2 routine or the stack is ... you're jumping to the ROM to read the keyboard, have ... />
Have you got the ROM paged in when you RST ...Assistance with IM2 routineI subsequently got a working IM2 routine.
... 255 from BASIC while the IM2 routine is running bit 7 ... segment. Are you sure the rom isn't doing something to ... it? The 2068 rom would and the 2048 rom might have something ...How can I tell if 128k in codeIs there an easy way in code to check if the Spectrum has 128k, rather than 48k so I can display a message "Must have 128k" etc
... . For this, set up an IM2 interrupt which does, something like ... ?), or be paged in as ROM.
The problem with ... like the UDG's or ROM, is that it makes the ... you're using a standard ROM.MINIGAME COMPO 2006[url="http://www.ffd2.com/minigame/"]http://www.ffd2.com/minigame/[/url] it could be nice to meet you there :)
... trick is allowed, including compression, ROM routines and so on.
16k game, and with the compression ...Broken SpectrumJust found out that both of my +3s have died. :( Seems to be the same problem with both, that the disk-drive just doesn't want to spin anymore. An…
... a memory location passes the ROM test (assuming it does?) it ... the same way - even a 16K game?
What number ...ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... =aowen]It's not the ROM access that causes incompatilbility. There ... the machine bank switches in 16k blocks. Essentially what I'm ... 128k/+2a/+3 ROM management by loading each 16k block into different ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... at address 0x38 in the ROM will be executed. That code ... : one way is to use IM2 mode to set up our ... quite ready to talk about IM2.LIB just yet.
Interface 1 Memory Map(I'm not sure which section this post should go in, but here seems as good as any) Since the Interface 1 ROM is only 8k long, does anyone know what …
... admit, having the 8K ROM paged in at 0000h - ... you connect an 8K ROM to a 16K address decoder (The ... normal ROM select). As an ... plugging an 8K ROM into the Spectrums ROM socket - it ... -8k and again at 8-16k.
However, ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... 0x66 is located in the ROM.
Maskable interrupts, ... Library[/B]
The IM2 library provided in Z88DK makes ... 11 bytes
; d4d4 - d4e4 IM2.LIB generic isr with one ... suggested at 0xd4d4.
IM2.LIB requires us to specify ...What is the rarest sinclair item u have ?For me, its a Sinclair PC200 boxed working and complete, has anyone any idea what its worth ? I am going to be selling it along with the rest of my …
... , and a Multiface 128 with ROM version 87.12 ;-)
I also have a 16k speccy, pristine condition, boxed, looking ...128K (heatsink) or +2 greylooking for one of these due to being unable to play 128K games on my 48K :) just in emu :( anyone has functioning and cheap one around ireland? (th…
doing from Dos:
copy /b se-0.rom + se-1.rom romboth
only got me a 16k file ,
and a message of 1 file copied
din?t combine them into a 32k file
the cat command does not work from dos128K (heatsink) or +2 greylooking for one of these due to being unable to play 128K games on my 48K :) just in emu :( anyone has functioning and cheap one around ireland? (th…
... -0.rom + se-1.rom romboth
only got me a 16k ...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... not rely on the spectrum ROM or interrupts, and scans the ... -contained and independent of the ROM. A fast function.
IM2, for example, stdio's scanf ... . By executing in_GetKey() in the IM2 routine and writing the result ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... more than a 48K Spectrum ROM mapped to the 0-16k region.The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... will disable the internal ROM. This was used for ... 16k RAM internally to put in place of the paged out ROM ... Memory segmented into 8k or 16k blocks with the ability to ... />
The ROM would have to be modified ... a total rewrite of the ROM.
[quote]< ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... will disable the internal ROM. This was used for ... 16k RAM internally to put in place of the paged out ROM ... segmented into 8k or 16k blocks with the ability ... />
[quote]The ROM would have to be modified ... a total rewrite of the ROM.[/quote]
A blitter ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... .
[quote]
(8k/16k paging)
Actually, that's ... page sizes at 8k OR 16k (not both). Timex chose 8k ... pages and Sinclair chose 16k pages. I think 16k may be too ... (eight) 16k(8k) pages programmably occupied by any page of ROM or ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... page sizes at 8k OR 16k (not both). Timex chose 8k ... pages and Sinclair chose 16k pages. I think 16k may be too ... (eight) 16k(8k) pages programmably occupied by any page of ROM or ... , just physical paging.[/quote]
16K is way bigger than needed ...128K memory testingDuring a mad half hour I decided to write a little memory tester program in BASIC using the information from the 48K service manual. Now I was wonder…
Problem with testing spectrum 128K ram in BASIC is that if any of the chips go tits up the computer won't boot. It would have to be machine code in a custom ROM only.
On the 48 if the bottom 16K is ok it will go into BASIC.Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…
... only a 16K machine, it sounds like the Z80 or ROM is ...128K memory testingDuring a mad half hour I decided to write a little memory tester program in BASIC using the information from the 48K service manual. Now I was wonder…
... />
You can read the ROM test routine here.
rom/rom0-2002-07-14.htm ... to 0 paging a different 16k block in at the top ...Amazon SystemsIn the 1980s, my company, Amazon Systems, did quite a few Arcade to Home Computer conversions for Parker Games. The games Panama Joe and Death Star…
... Spectaculator as things stand as .rom images... I've cobbled together ... untouched and not release false 16k files just to load into ... be amended to allow 8k .rom images to be allowed, with ...
