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The Sinclair ZX Microdrive Resurrection Project (long)Dear Spectrum fans! [Management summary: Download [url]http://www.bartheld.net/temp/mdv2img.zip[/url] and tell me what you think. All help very much…
... [/url] if you want to tweak the machine code.
tweak the code as you like ... -
BIT/RES/SET b,r where b is variableWhat's the best way to use the bit flag group of commands if it's not known in advance which bit should be referenced; ie. where it's dependent upon …
... particular one with either a "jp (hl)" or a series of ... -
ANN: Tipshop updated Saturday 31 March 2012Saturday 31 March 2012 Loads of maps and RZX Archive entries this month - and it nearly made it on time, too! * Archie Robins sent in POKEs for Foo…
... for Turrican II.
* JP sent in POKEs for Arkanoid ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
Running my ZX Spectrum in JapanI finally got my Spectrum running nicely here in Japan, so I wrote up a blog on it. It was originally in Japanese, as I had aimed it at Japanese enth…
... />
[url]http://pcbiroiro.blogspot.jp/2012/01/running-zx-spectrum ...Inefficient code in ROM, from ram-check to RAM-DONEHere is the inefficient code: [CODE] ;; ram-check L11DA: LD H,D ; Transfer the top value to the HL register LD L,E …
... we reached ROM - $3F ?
JP NZ,L11DA ; Back to RAM ... (HL) ; decrement to zero.
JP Z,L11E2 ; back to RAM ...Matching calls and returnsHi all, A pretty fundamental question here that I probably should have sorted by now. I've noticed how much the stack has built out in my current g…
... have been lost I just jp back to the very beginning ...Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... ld (endcall), hl
jp blit ; call blit
ENDM ... pop af
jp 56 ; exit via BASIC interrupt ... push af
defb 0xc3 ; jp endcall
endcall:
... 0xfff4
vector:
jp im_main ; jump to main interrupt ...Just found my Psion Revo[img]http://www.enfour.co.jp/psion/revo/image/main_image.jpg[/img] What a lovely piece of kit this is. Such a sleek design. But since I packed it a…
[img]http://www.enfour.co.jp/psion/revo/image/main_image.jpg[/ ...ANN: Tipshop updated Thursday, 31 May 2012Thursday 31 May 2012 Some very interesting POKEs this month * Hippy Smith sent in HUGE(!) POKEs for Echelon, Hive, Infiltrator, Sentinel, The and V…
... them all correctly!
* JP sent in cheats for Battery ...Trace in debuggersExist any ZX emulator using debugger with possibility trace back ? I need see previous instructions and it can be hard if it's JP xxxx
Exist any ZX emulator using debugger with possibility trace back ?
I need see previous instructions and it can be hard if it's JP xxxxANN: Tipshop updated Sunday, 09 September 2012Sunday 09 September 2012 Lots of stuff going on In Real Life, so the update is a tad late! * JP provided a correction to the type-in hacks for Agen…
... a tad late!
* JP provided a correction to the ... Byte
* StuBruise (via JP) provided a correction to the ...recovering the stack after an errorMy normal error handler starts with the stack as reset by LD SP,(ERR_SP) in $0053 ERROR_2, sets up some stuff and returns to BASIC via a "JP C,$1e73 …
... returns to BASIC via a "JP C,$1e73 ;GO_TO_2", which works ...syntax checking helpcan anyone help with syntax checking, its been a while since I did any basic extension coding this routine always gives :C nonsense in basic error …
ANN: Tipshop updated Wednesday, 31 October 2012Wednesday 31 October 2012 Happy Halloween! * Archie Robins provided corrected POKEs for Liberator, Swat! as well as new POKEs for Devil's Castle, Di…
... 'Run Italian magazine.
* JP sent in corrections for the ...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…
... ;compare to far right
jp z,shprst ;yes then reset ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
hi! please, help with code:
[PHP]For x=-100 To 100
For y=-100 To 100
If (x/2-25)*(x/2-25)+(y-50)*(y-50)Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... /> defb 210 ;3 bytes nop (JP NC)
exo_setbit:
add ... /> defb 210 ;3 bytes nop (JP NC)
exo_setbit:
add ...Omitting LETAn untested thought. Changing: [code]1B34 SUB $CE ; Reduce command code by $CE to ; give 00 to 31 for comman…
... 31 for commands
1B36 JP C,L1C8A ; Jump to REPORT ...ANN: Tipshop updated Friday, 30 November 2012Friday 30 November 2012 Happy 17th Birthday, WoS!! * Flavio M Matsumoto sent in a fixed POKE for Batman: The Movie. * Andrew Ryals sent in POKEs f…
... Strike Force Cobra.
* JP sent in POKEs for Encyclopaedia ...Compiling Lisp to Z80.I am doing some thought experiments on this. Here is an example of a Lisp program. It adds two numbers together. [code] (define (add x y) (if (= …
Deathchase remake for Android, html and WindowsHi, I've been a longtime lurker here, but not posted. I've been doing the One Game a Month challenge and it's given me the impetus to finally restar…
... few graphics and sounds to tweak over the next couple of ...
