• This demo is a BASIC program that draws a circle and then a sine funtion.
• Library - There are also game and miscellaneous other programs
• http://tinyurl.com/demozx81
• http://www.vavasour.ca/jeff/ts1000/index.html

; -------------------------
; Last updated: 13-DEC-2004
; -------------------------
;
; Work in progress.
; This file will cross-assemble an original version of the "Improved"
; ZX81 ROM.  The file can be modified to change the behaviour of the ROM
; when used in emulators although there is no spare space available.
;
; The documentation is incomplete and if you can find a copy
; of "The Complete Spectrum ROM Disassembly" then many routines
; such as POINTERS and most of the mathematical routines are
; similar and often identical.
;
; I've used the labels from the above book in this file and also
; some from the more elusive Complete ZX81 ROM Disassembly
; by the same publishers, Melbourne House.

An 8080 actually, not a Z80

• Readme file
• Run JSSpeccy online (includes 10 classic games!)
• Download JSSpeccy (644Kb)
• JSSpeccy Subversion repository