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ZX48K 128K modHas anyone make this mod to the ZX48K? Does it work? [URL]http://hw.speccy.cz/128krebuild.html[/URL] Micky
... , and putting all the logic in a CPLD to save some space ... logic and syntetized it into a Xilinx XC9536 CPLD. Now I ... is to fit it all in a rubber key case. -
ZX48K 128K modHas anyone make this mod to the ZX48K? Does it work? [URL]http://hw.speccy.cz/128krebuild.html[/URL] Micky
... , and putting all the logic in a CPLD to save some space ... logic and syntetized it into a Xilinx XC9536 CPLD. Now I ... is to fit it all in a rubber key case.[/QUOTE]
New Russian ZX clones available?Is it possible to buy new Russion ZX clones? I mean where these computer build nowadays? Micky
Damn, that Speccy2010 is sweet - imagine that in a rubber-key 48K case. There's just the small matter of soldering a CPLD though...
(sorry Winston, I'm still not convinced that hand-soldering SMT is possible for non-crazy people :-) )Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... />
[CODE] ld a,0
ld c,30
ld de ... /> ld hl,0
rl c
rla
adc hl ... by 30 getting 3 in A:C and 10 in HL.
PaddyZ80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... />
[CODE] ld a,0
ld c,30
ld de ... /> ld hl,0
rl c
rla
adc hl ... by 30 getting 3 in A:C and 10 in HL.
Paddy ... /> LD B,H
LD C,L
before the RET ...Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... />
ld a,0
ld c,30
ld ... by 30 getting 3 in A:C and 10 in HL.
[/quote ... or alternately, put it in a loop that executes that many ... [code]
ld a,0
ld c,30
ld ... ld b,a
ld a,c
cpl
ld c,a
...Japanese computers and consolesThere some really nice ones out there if you can find them on yahoo auctions japan or ebay,now i think parts and the annoyance of using the stepdown …
... younger, remember seeing it in a C+VG or something when I ... had loads of coverage in the feature of China Warrior ... the game shops in town had a Neo-Geo one ... time, they'd just got World Heroes in ... been in jap, the games cost a fortune, and a lot ...Beebs Back in Education AgainBletchley Park Museum of Computing is running classes for A-Level students in computing using old BBC-Bs: [URL="http://www.bbc.co.uk/news/technology-…
[QUOTE=joefish;469950](in the highly bizarre world ... . It'll work on a vt100 terminal, it works ... (press Ctrl-L in terminal session in Mac OSX or Linux ... "putc(12)" in a C program that outputs to a terminal window, it ... clear the screen on a Speccy using the z88dk.logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... about two years ago, in [url=http://www.speccy. ... CD_ADD
push hl ;in stack, so I recover it ... stack.
ld a,2
call CHAN_OPEN ; ... interact with BASIC variables in a C/M program, I don ...Help! Reverse engineering a Spectrum game[deleted]
... I would really start doubting in my skills and chances.
[B]LD BC,something
IN A,(C)[/B]
02 - Divide ... multiply routines
[B]A loop in the code without any special ... simpler[/B]
20 - A fast screen address lookup routine ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... out (c),d
ld bc,65533
wait in a,(c) ; ... Poll
and a,d ; RxD
...
ld a,127 ; Keyboard bail out
in a,(254)
and ... ,65533 ; 10
in a,(c) ; 12
and a,00010000b ; 7
...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... out (c),d
ld bc,65533
wait in a,(c) ; ... Poll
and a,d ; RxD
...
ld a,127 ; Keyboard bail out
in a,(254)
and ... ,65533 ; 10
in a,(c) ; 12
and a,00010000b ; 7
...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... out (c),d
ld bc,65533
wait in a,(c) ; Poll ...
and a,d ; RxD
jr ... ,65533 ; 10
in a,(c) ; 12
and a,00010000b ; 7
... Subtract length
ld a,c
or a,b
jr nz ...SPRINTER 2000 and kempston joystickInfo about connection kempston joystick connector on Sprinter 2000 are corrected. My previous documentation contain bugs. Here is all OK (tested on r…
...
LD BC,15 + IN A,(C) - can be used for joy ... />
[B]LD BC,31 + IN A,(C) - return always value 0 !!![/B ... adress 15 or replace instruction IN A,(C) with IN A,(31).
[B ...Simple & Portible means to boost PC Soundcard Line Out?Hi Guys, My older computers were very good at driving a real spectrum's ear socket via their Line Out or Headphone socket. My new Dell's sound card…
... ] LD BC, 254
loop: IN A,(C)
AND 64 ; EAR bit ... 8 ; set MIC
OUT (C),A ; output to BORDER + MIC
in the blue and blue in the black. Debouncing ... ?
Could a capacitor across ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... /> LD BC,191 ; Port to IN from
LD HL,32767 ...
loop: IN A,(C)
LD (DE),A
INC DE
DEC HL
LD A,H
OR L
A to another register to avoid ...Genesis: dawn of a new day, new game from RetroWorks!It's been a long development, but finally we made it. We proudly present the latest game from RetroWorks, Genesis: dawn of a new day. [img]http://ww…
... FADF
IN D,(C)
INC B
IN E,(C)
... LD B,#FF
IN A,(C ... bus - internal pull-up in ZX)
IN A,(#1F) ;if is used ... ;if detect left+right in same time then it's ... ;if detect up+down in same time then it's ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... /> LD (32769),A ; Could start at 32768 in theory, but no ... benefit
LD A,162 ... br /> LD A,201
LD (65535),A ; Stick a RET on the ... to read from
trig IN A,(C)
AND 16 ; Trigger ... this will read data in as fast as is ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... to read from
trig IN A,(C)
AND 16 ; ... /> LD C,port#
LD E,16
trig: IN A,(port#) ... ; 1 T-state faster than IN A,(C)
AND ... ; btw: perhaps IN A,(port#) sets a flag that you can ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
Just checked: IN reg,(C) sets the sign flag (the "IN A,(port#)" doesn' ... - why not?
LD C,port#
trig: IN A,(C) ; bit 7 read ... sure HL doesn't cross a a 256-byte boundary here< ... store the value read in another register (in the wait loop), ...Help?Hi All, I wonder if anyone has a few minutes to look at this bit of code I'm working on. I'm trying to move to sprites and want to do it with a scr…
... the sprite moves down a line
in a,(c) ;ins, first bit ... ix at where we are in the table
loop ... low byte
ld (hl),a ;a, the screen address, is loaded ... of sprite
ld a,(hl) ;we load screen ... address with a on return
inc ...ANN: Spectaculator 7.5Spectaculator 7.5 is now available from [URL="http://www.spectaculator.com/"]http://www.spectaculator.com/[/URL] - Spectrum +3 disk images in IPF fo…
... =Strident;509205]Damn... Just did a clean install of Spectaculator 7 ... to uninstall 7.5, install a 7.0 version, insert the ... as v7. If you put in a v6 key, it will automatically upgrade ... it to a v7 one (internet connection ...ANN: Spectaculator 7.5Spectaculator 7.5 is now available from [URL="http://www.spectaculator.com/"]http://www.spectaculator.com/[/URL] - Spectrum +3 disk images in IPF fo…
... as v7. If you put in a v6 key, it will automatically upgrade ... it to a v7 one (internet connection ...Krazy Kong by C*TechI wrote a piece about this 1982 classic this week: [url]http://wosblog.podgamer.com/2011/02/10/the-worst-videogame-ever-made/[/url] but someone in …
... achieved the quality of a poor type-in program. A very slap-dash ... effort to put on a commercial ... the Krazy Kong furore reported in a C&VG Great Software Disasters ... placed any Spectrum games adverts in C&VG anyway, so it ...World of Spectrum JAM - All Abilities Welcome.Well I since I got my new keyboard the other week I had this brain wave for a World of Spectrum Jam. I aim to have it work like this. First someone …
... with this one first. Once a few more instruments are layered ... . If you let me know a key and tempo that suits I ... can put something together for a second track.[/QUOTE]
a C key with a mid range tempo. We ...Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
...
Using IN A,(C) because it sets the flags while IN A,(nn) doesn ... bit comes right on time. IN A, (C) wastes no t-states. ... too late for in a,(c) to read. execution of in a,(c) wastes -perhaps- ... 4 t-states, jp wastes 10, next in a,(c ...Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... for the combination of IN,(L) plus JP (HL ... I]) was an option. In a multitasking environment it is ... almost perfect. It executes in 5 t-states if ...
IN A,(C) ; 12
RET M ; 5/11
IN A,(C) ; 12 ... t-states)
In theory, of course. :) Now ...Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... times before giving up
in a,(c) ; read rs232 data bit | 12 ... ; 5/11 t-states
in a,(c) ; read rs232 data bit | 12 ... ; 5/11 t-states
in a,(c) ; read rs232 data bit | 12 ... ; 5/11 t-states
in a,(c) ; read rs232 data bit | 12 ...GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…
... b,0xfe
ld c,0xdf
in a,(c) ; acc=port fedf
ld a,0x3b
in a,(0xdf)
ld (hl),a
inc ...
ld a,0x3f
in a,(0xdf)
ld (hl),a
inc ... hl
ld a,0x3a
in a,(0xdf)
ld (hl ...
