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Break into programIs there any way of stopping people using the break option in my software productions so they can list the code.
... the error return off the stack but doesn't restore it ... wouldn't matter as the stack gets reset after the error ... now is in the other ROM and so the second BREAK ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... something; perhaps it is making ROM calls.
[quote]Of ... 's no danger of a stack placed at 60000 or something ... -
Faulty +3Hi all Hoping this isn't the 40077 dead on my +3 but....... [IMG]http://www.darrenwileman.co.uk/SPEC/Plus3.jpg[/IMG] Tried the following in anothe…
... the classic symptom of no ROM, as the CPU ends up ... 38 instructions, which force the stack to grow uncontrollably and overwrite ... />
I'd recheck the ROM socketing, and if you don ... -
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... published in The Complets Spectrum Rom Dissasembly.
[CODE]THE ... HL,+053F Preload the machine stack
PUSH HL with the ... -
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... trouble with not using the ROM routines is that devices like ... the code from the original ROM then you really ought to ... (derived from the SAM skeleton ROM):
[code]; THE 'LD-BYTES ... black
ld hl, sa_ld_ret ; stack
push hl ; return address ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... write to #0000 during a calculator operation, and there's a ... bit7="1" will keep BASIC ROM into place... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
IIRC the Spectrums internal calculator uses address &0000 to ... /> Search the web for Spectrum ROM bugs ([URL="http://nonowt.com ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
[QUOTE=Shaos;727208]Does it mean any basic math?[/QUOTE]
Had to look it up. It's the skip constants routine at #33F7. Overwrites the first five bytes of the ROM. Can contain any value at all. Gets called during calculator operations. -
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... posted here assume the 48k ROM is currently enabled, eg, ... will make sure the 48k ROM is present and that is ... models. It's saving the stack pointer before the tape call ... 128 models if the 48k ROM needs to be banked in ... assume you have the 48k rom present. -
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... number of instructions. The ZX81 ROM, and by extension the Spectrum ... ROM is notable for its use ... instruction set for its internal calculator which probably saves a heap ... -
Issue 4A black paper, white borderJust had one of these through, nice yellow pcb! Everything but the ULA soldered in. On power up I get black paper, white border and some intermitten…
... the test passes, thus the ROM code thinks that 48k of ... then tries to place the stack in faulty upper memory, all ... -
SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…
... have to do ROM paging just to use the calculator.
[quote ... -
Use PLAY without the 128 ROMHere's a little thing I wrote called SoftPLAY: [url]http://www.worldofspectrum.org/forums/showthread.php?t=45259[/url] Now you can use the PLAY comm…
... a timing value for the calculator loop that gives something closer ... the same speed as the ROM, but it's tricky because ... the ROM code is buggy and adds ... -
SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…
... at address #000B in ZX rom must be JP #ZXRAM and ... 't call parts of ZX rom, only after return from PLAY ... use many ROM routines but it does use the floating point calculator. -
SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…
... many ROM routines but it does use the floating point calculator.[/QUOTE ... ]
Then ok, you can use any ZX rom ... routines and floating point calculator (I must make ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... hl ; numeric to stack
call stack_num ; stack it
jr ...
fwait ; perform
fsgl ; calculator
fce ; operation
jr ... br /> s_next:
push bc ; stack present values
rst next_char ... -
IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
... (left), i.e. the ROM
switched in at ... (000h...3FFFh) is ROM 3 (the 48 BASIC ROM). The RAM page ... 0 and the machine stack resides in this area ... the top of memory, the stack held somewhere in that range ... 4000h...BFE0h, and ROM 2 (the DOS ROM) switched in at ... -
I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…
... ROM, in some form, it will come with the f/p calculator ... /> ..Just zoomed in on that ROM board and yes original Sinclair ... -
Break into programIs there any way of stopping people using the break option in my software productions so they can list the code.
... ;STMT-RET (+2A/+3/+3e ROM.1)
push hl
stack in the location pointed to ... (ERR_SP) before poking the machine stack.
* If the error ... REM continues here when GOSUB stack has been reset
[/code ... -
I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…
... it's worth upgrading the rom to the EL-2364 Flash ... are going to upgrade the ROM use the one found here ... /> third post down (SG81_b.zip) calculator errors corrected and it's ... -
I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…
... going to upgrade the ROM use the one found ... third post down (SG81_b.zip) calculator errors corrected and it's ... is going to get the rom modified for me.
rom on the motherboard or ... on the switchable ROM board?
... -
Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …
... /> pagout POP HL ;clear the stack
POP HL ; we ... OUT (191),A ; Xx SHD rom
DEC HL
... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... stk_var ; parameters and variables to calculator
bit 6, (iy + ... so
fwait ; enter calculator
fstk0 ; stack zero
fce ; ... exit calculator
ret ; end ... -
z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... you don't run the ROM ISR, you'll never ... does not depend on the ROM code.
Instead ... there.
The ROM ISR (rst 56) will reenable ... 32768 and up, and the stack at wherever Basic put it ... , always check if the stack location is the culprit. -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
...
make_room:
push hl ; stack pointer
call test_room ; check ... (stkend), hl ; the stack
push hl ; stack stkend
ld hl ...
open:
fwait ; enter calculator
fxch ; swap stream number ... -
LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…
... the machine stack. As this will have been returning to ROM code ... -
LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…
... the machine stack. As this will have been returning to ROM code ... -
LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…
... overwrote the stack so when the load routine in ROM returned, it ... on the top of the stack?
I could be ... -
LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…
... overwrote the stack so when the load routine in ROM returned, it ... on the top of the stack?
I could be ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... push bc ; stack position
push hl ; stack destination
... ld a, %00001111 ; ROM 0, VRAM 1, RAM ...
