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Recently bought a copy of Silver Valley on cartridge for SMS. Does anyone know where I can buy or download a replacement cover please? Already tried eBay but wondered if the dev has a URL or something. Hoping he (or someone in the know) sees this.

Thanks,
8BitBoyUK

8BitBoy wrote

Recently bought a copy of Silver Valley on cartridge for SMS.

Where did you find that?

Facebook :)

Just arrived

thumbnail_20210113_131826_Film1.jpg (151.4 KB)

https://www.smspower.org/forums/files/silver_valley_113.png

Ummmm....

Does somebody knows about an optimized sqrt function for sdcc? Since previous games were made with z88dk, i had the math unit, but i don't find the same on sdcc!

[edit]:
Have found:

http://www.retroprogramming.com/2017/07/a-fast-z80-integer-square-root.html

If someone could encapsulate the fnal code into a working sdcc function...

I don't usually use sqrt(), there's usually a way to avoid it ;)

BTW in case we could use this one for instance, conveniently wrapped in C

unsigned char fast_sqrt (unsigned int value) __naked __z88dk_fastcall {
__asm
; fast 16-bit isqrt by Zeda Thomas
;Feel free to use for whatever :)

;Input: HL
;Output: L is the integer square root of HL
;Destroys: HL,DE (D is actually 0)

ld de,#0x05040 ; 10
ld a,h ; 4
sub e ; 4
jr nc,sq7 ;\
add a,e ; | branch 1: 12cc
ld d,#16 ; | branch 2: 18cc
sq7: ;/

; ----------

cp d ; 4
jr c,sq6 ;\
sub d ; | branch 1: 12cc
set 5,d ; | branch 2: 19cc
sq6: ;/

; ----------
res 4,d ; 8
srl d ; 8
set 2,d ; 8
cp d ; 4
jr c,sq5 ;\
sub d ; | branch 1: 12cc
set 3,d ; | branch 2: 19cc
sq5: ;/
srl d ; 8

; ----------

inc a ; 4
sub d ; 4
jr nc,sq4 ;\
dec d ; | branch 1: 12cc
add a,d ; | branch 2: 19cc
dec d ; | <-- this resets the low bit of D, so `srl d` resets carry.
sq4: ;/
srl d ; 8
ld h,a ; 4

; ----------

ld a,e ; 4
sbc hl,de ; 15
jr nc,sq3 ;\
add hl,de ; | 12cc or 18cc
sq3: ;/
ccf ; 4
rra ; 4
srl d ; 8
rra ; 4

; ----------

ld e,a ; 4
sbc hl,de ; 15
jr c,sq2 ;\
or #0x20 ; | branch 1: 23cc
db #254 ; | <-- start of `cp *` which is 7cc to skip the next byte.
sq2: ; | branch 2: 21cc
add hl,de ;/

xor #0x18 ; 7
srl d ; 8
rra ; 4

; ----------

ld e,a ; 4
sbc hl,de ; 15
jr c,sq1 ;\
or #8 ; | branch 1: 23cc
db #254 ; | <-- start of `cp *` which is 7cc to skip the next byte.
sq1: ; | branch 2: 21cc
add hl,de ;/

xor #6 ; 7
srl d ; 8
rra ; 4

; ----------

ld e,a ; 4
sbc hl,de ; 15

sbc a,#255 ; 7
srl d ; 8
rra ; 4
ld l,a ; we need to place result in L
ret ; because this is nakėd
__endasm;
}

edit: immediates fixed, SDCC uses some different asm dialect...
edit2: made the function nakėd

You are my hero ;)

you are mine! :D

had to replace two lines (a dot before "db")

ex:

"db #254" to ".db #254"

but it works :)

Hi eruiz00, Do you have the intention of releasing physical copies of your games?.

Your games are very good, and It would be awesome.

Thank you!.

Maybe... or maybe not.

If someone wants to make physical copies and we agree in the terms, we could release the rom as physical edition months before releasing the rom (although i am almost sure someone will release the rom before!)... maybe a crowfunding?

But this is not my main objetive (i would be making games for android or unity or elsewhere) and this game wont be finished in a long time. The fact is the new project main concept is a sort of development and narrative sandbox, too many things to do in it, if i want it to be properly finished.

... and I feel myself free at all, now that i have unlimited code size (checked and confirmed... i have now a 160kb rom with code on several banks working) i am doing the things more refined than before, with finished menus, effects, minigames, transitions, a more complex engine, etc. too many work dude!

Regards.

Finally made it to first boss (dragon). He's bloody hard as nails. Managed to knock him off the screen but now can't progress. Will have to reset

1610809953320340453177.jpg (2.8 MB)

It was a known ( by me) bug... I tryed to fix it but i see i did not it at all. Shame on me.

WoW eruiz00, It is fantastic reading about your new project and finding expresions like "now that i have unlimited code size (checked and confirmed", "doing the things more refined than before", "with finished menus", "effects, minigames, transitions", "a more complex engine, etc"

Altought your main objective is not releasing physical copies, maybe It would help you accomplishing the main one watching your work beatifully presented and earning some coins for working hard.

Regards dude!.

eruiz00 wrote

It was a known ( by me) bug... I tryed to fix it but i see i did not it at all. Shame on me.

Thanks. I restarted and was more careful this time. I kissed his ass. Thanks.

Is there a way to get more lives on the console version (like emulation)? Or can you access menu on the console version?

eruiz00 wrote

had to replace two lines (a dot before "db")

oh right. sorry.

Author	Message
8BitBoy Joined: 15 Aug 2019 Posts: 27 Location: Lancashire UK	Silver Valley Posted: Wed Jan 13, 2021 9:21 am Last edited by 8BitBoy on Sat Jan 16, 2021 3:10 pm; edited 1 time in total
	Recently bought a copy of Silver Valley on cartridge for SMS. Does anyone know where I can buy or download a replacement cover please? Already tried eBay but wondered if the dev has a URL or something. Hoping he (or someone in the know) sees this. Thanks, 8BitBoyUK

sverx Joined: 05 Sep 2013 Posts: 2818	Posted: Wed Jan 13, 2021 11:09 am
sverx Joined: 05 Sep 2013 Posts: 2818	8BitBoy wrote Recently bought a copy of Silver Valley on cartridge for SMS. Where did you find that?

8BitBoy Joined: 15 Aug 2019 Posts: 27 Location: Lancashire UK	Posted: Wed Jan 13, 2021 11:28 am
	Facebook :)

8BitBoy Joined: 15 Aug 2019 Posts: 27 Location: Lancashire UK	Posted: Wed Jan 13, 2021 1:21 pm
	Just arrived thumbnail_20210113_131826_Film1.jpg (151.4 KB)

8BitBoy Joined: 15 Aug 2019 Posts: 27 Location: Lancashire UK	I found one... Link below Posted: Wed Jan 13, 2021 3:22 pm
	https://www.smspower.org/forums/files/silver_valley_113.png

eruiz00 Joined: 28 Jan 2017 Posts: 388 Location: Málaga, Spain	Posted: Thu Jan 14, 2021 6:50 pm
	Ummmm.... Does somebody knows about an optimized sqrt function for sdcc? Since previous games were made with z88dk, i had the math unit, but i don't find the same on sdcc! [edit]: Have found: http://www.retroprogramming.com/2017/07/a-fast-z80-integer-square-root.html If someone could encapsulate the fnal code into a working sdcc function...

sverx Joined: 05 Sep 2013 Posts: 2818	Posted: Thu Jan 14, 2021 7:01 pm
sverx Joined: 05 Sep 2013 Posts: 2818	I don't usually use sqrt(), there's usually a way to avoid it ;) BTW in case we could use this one for instance, conveniently wrapped in C unsigned char fast_sqrt (unsigned int value) __naked __z88dk_fastcall { __asm ; fast 16-bit isqrt by Zeda Thomas ;Feel free to use for whatever :) ;Input: HL ;Output: L is the integer square root of HL ;Destroys: HL,DE (D is actually 0) ld de,#0x05040 ; 10 ld a,h ; 4 sub e ; 4 jr nc,sq7 ;\ add a,e ; \| branch 1: 12cc ld d,#16 ; \| branch 2: 18cc sq7: ;/ ; ---------- cp d ; 4 jr c,sq6 ;\ sub d ; \| branch 1: 12cc set 5,d ; \| branch 2: 19cc sq6: ;/ ; ---------- res 4,d ; 8 srl d ; 8 set 2,d ; 8 cp d ; 4 jr c,sq5 ;\ sub d ; \| branch 1: 12cc set 3,d ; \| branch 2: 19cc sq5: ;/ srl d ; 8 ; ---------- inc a ; 4 sub d ; 4 jr nc,sq4 ;\ dec d ; \| branch 1: 12cc add a,d ; \| branch 2: 19cc dec d ; \| <-- this resets the low bit of D, so `srl d` resets carry. sq4: ;/ srl d ; 8 ld h,a ; 4 ; ---------- ld a,e ; 4 sbc hl,de ; 15 jr nc,sq3 ;\ add hl,de ; \| 12cc or 18cc sq3: ;/ ccf ; 4 rra ; 4 srl d ; 8 rra ; 4 ; ---------- ld e,a ; 4 sbc hl,de ; 15 jr c,sq2 ;\ or #0x20 ; \| branch 1: 23cc db #254 ; \| <-- start of `cp ` which is 7cc to skip the next byte. sq2: ; \| branch 2: 21cc add hl,de ;/ xor #0x18 ; 7 srl d ; 8 rra ; 4 ; ---------- ld e,a ; 4 sbc hl,de ; 15 jr c,sq1 ;\ or #8 ; \| branch 1: 23cc db #254 ; \| <-- start of `cp ` which is 7cc to skip the next byte. sq1: ; \| branch 2: 21cc add hl,de ;/ xor #6 ; 7 srl d ; 8 rra ; 4 ; ---------- ld e,a ; 4 sbc hl,de ; 15 sbc a,#255 ; 7 srl d ; 8 rra ; 4 ld l,a ; we need to place result in L ret ; because this is nakėd __endasm; } edit: immediates fixed, SDCC uses some different asm dialect... edit2: made the function nakėd

eruiz00 Joined: 28 Jan 2017 Posts: 388 Location: Málaga, Spain	Posted: Thu Jan 14, 2021 10:24 pm
	You are my hero ;)

sverx Joined: 05 Sep 2013 Posts: 2818	Posted: Fri Jan 15, 2021 1:04 pm
sverx Joined: 05 Sep 2013 Posts: 2818	you are mine! :D

eruiz00 Joined: 28 Jan 2017 Posts: 388 Location: Málaga, Spain	Posted: Sat Jan 16, 2021 7:48 am
	had to replace two lines (a dot before "db") ex: "db #254" to ".db #254" but it works :)

Aranya Joined: 02 Mar 2011 Posts: 92 Location: Valencia,Spain.	Posted: Sat Jan 16, 2021 9:55 am
	Hi eruiz00, Do you have the intention of releasing physical copies of your games?. Your games are very good, and It would be awesome. Thank you!.

eruiz00 Joined: 28 Jan 2017 Posts: 388 Location: Málaga, Spain	Posted: Sat Jan 16, 2021 11:10 am
	Maybe... or maybe not. If someone wants to make physical copies and we agree in the terms, we could release the rom as physical edition months before releasing the rom (although i am almost sure someone will release the rom before!)... maybe a crowfunding? But this is not my main objetive (i would be making games for android or unity or elsewhere) and this game wont be finished in a long time. The fact is the new project main concept is a sort of development and narrative sandbox, too many things to do in it, if i want it to be properly finished. ... and I feel myself free at all, now that i have unlimited code size (checked and confirmed... i have now a 160kb rom with code on several banks working) i am doing the things more refined than before, with finished menus, effects, minigames, transitions, a more complex engine, etc. too many work dude! Regards.

8BitBoy Joined: 15 Aug 2019 Posts: 27 Location: Lancashire UK	1st boss disappears off screen Posted: Sat Jan 16, 2021 3:13 pm
	Finally made it to first boss (dragon). He's bloody hard as nails. Managed to knock him off the screen but now can't progress. Will have to reset 1610809953320340453177.jpg (2.8 MB)

eruiz00 Joined: 28 Jan 2017 Posts: 388 Location: Málaga, Spain	Posted: Sat Jan 16, 2021 9:32 pm
	It was a known ( by me) bug... I tryed to fix it but i see i did not it at all. Shame on me.

Aranya Joined: 02 Mar 2011 Posts: 92 Location: Valencia,Spain.	Posted: Sun Jan 17, 2021 7:30 am
	WoW eruiz00, It is fantastic reading about your new project and finding expresions like "now that i have unlimited code size (checked and confirmed", "doing the things more refined than before", "with finished menus", "effects, minigames, transitions", "a more complex engine, etc" Altought your main objective is not releasing physical copies, maybe It would help you accomplishing the main one watching your work beatifully presented and earning some coins for working hard. Regards dude!.

8BitBoy Joined: 15 Aug 2019 Posts: 27 Location: Lancashire UK	Posted: Sun Jan 17, 2021 7:58 am
	eruiz00 wrote It was a known ( by me) bug... I tryed to fix it but i see i did not it at all. Shame on me. Thanks. I restarted and was more careful this time. I kissed his ass. Thanks. Is there a way to get more lives on the console version (like emulation)? Or can you access menu on the console version?

sverx Joined: 05 Sep 2013 Posts: 2818	Posted: Mon Jan 18, 2021 11:25 am
sverx Joined: 05 Sep 2013 Posts: 2818	eruiz00 wrote had to replace two lines (a dot before "db") oh right. sorry.

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