Search found 159 matches

by olofsen
Thu Jun 13, 2019 11:16 pm
Forum: Emulators
Topic: sz81 emulator
Replies: 8
Views: 340

Re: sz81 emulator

by olofsen
Sat Apr 27, 2019 4:57 pm
Forum: Emulators
Topic: bugs found on eo
Replies: 14
Views: 2285

Re: bugs found on eo

Per design, the Z condition bit is not affected by ADD HL,BC...
by olofsen
Sat Apr 27, 2019 3:15 pm
Forum: Development
Topic: Using sll with z80asm Version 1.8
Replies: 4
Views: 410

Re: Using sll with z80asm Version 1.8

Apparently z80asm doesn't know this undocumented instruction... For example zasm and sjasm do handle it:

https://k1.spdns.de/Develop/Projects/zasm/
http://www.xl2s.tk/
by olofsen
Sun Nov 11, 2018 7:31 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 26918

Re: SPeccy ON the ZeddY

The attachment on the previous page with ZTOS.P is updated to do the startup as described in the previous post, and I think it is indeed solved :)
by olofsen
Sat Nov 03, 2018 9:58 am
Forum: ZX BASIC
Topic: Possible bug in ZX81x2 ROM ?
Replies: 36
Views: 4286

Re: Possible bug in ZX81x2 ROM ?

On my ZXmore with ZXmaster 1.7 (but both when switched on and off), and an early CPLD, I do get the inverted screen. Without line 400, it is not inverted. The RAND indeed modifies the dummy display file according to the manual on page 12.
by olofsen
Thu Oct 25, 2018 11:59 pm
Forum: ZX BASIC
Topic: Possible bug in ZX81x2 ROM ?
Replies: 36
Views: 4286

Re: Possible bug in ZX81x2 ROM ?

Does the attached demo run ok? I changed a few calls to the ROM...

Code: Select all

	defpage 0,16393
	page 0
	incbin HRDEMO30.P

	code !	48f5h
	call	1be9h

	code !	4a40h
	call	nz,1b8dh
	
	code !	4b80h
	call	19fdh
by olofsen
Tue Oct 16, 2018 8:00 am
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 26918

Re: SPeccy ON the ZeddY

Yes, it is a special version (with a tiny patch for the tape loading) of the latest Sponzy I obtained from Zsolt.
by olofsen
Wed Oct 10, 2018 12:04 am
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 26918

Re: SPeccy ON the ZeddY

siggi wrote:
Tue Oct 09, 2018 9:14 am
PS: Instance 1 may also be a ZX81x2m.rom? Correct?
Correct! :)
by olofsen
Mon Oct 08, 2018 11:25 pm
Forum: ZX BASIC
Topic: SPeccy ON the ZeddY
Replies: 100
Views: 26918

Re: SPeccy ON the ZeddY

Attached is a ZX81 program to start Sponzy2018, so that TAPs such as FLIPPIT can be loaded via USB on the ZXmore. Have a ZX81 at instance 1, and program the Sponzy in the Flash ROM at instance 2. Start instance 1, and LOAD ZTOS.P with DS-L. Next, Sponzy should start automatically, and has access to ...
by olofsen
Sun Sep 23, 2018 1:06 pm
Forum: ZX BASIC
Topic: ZX81X2.ROM - and the big bang
Replies: 36
Views: 6311

Re: ZX81X2.ROM - and the big bang

Congratulations!!! :)