Spectrum Computing

Take Io with you, it will be useful.

Floating bus vs snow. Bang!
Emulators have beaten real hardware again.

Method 2 The basic idea is to store the checksums for all the blocks in which the reading through the stack is used. The interrupt routine considers the block checksum (add as a rule) and restores the value on the stack. Requires a little more memory (for checksums) and spends more tacts (~1400) in ...

method 1 ;sprite out routine ld c,(hl) inc hl ld b,(hl) inc hl ld sp,hl .... pop bc .... ;------ int ld (.memhl), hl pop hl ld (.memret), hl ld (.memsp), sp push bc ld sp, intSp .... ;player timer etc .memhl equ $+1 ld hl, 0 .memsp equ $+1 ld sp, 0 ei .memret equ $+1 jp 0

There are several techniques without disabling interrupts to work with data on the stack. Their application depends on the specific situation, if you give an example of how the stack can be used more precisely.

and ofc jp p ret equ ret m jr

from Russia with love
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