Hi, My project is used about 200 ROM pages and 33 RAM. So FUZIX solution is not applicable for me.
My suggestion: 1. Any function which calls (caller) banked function (callee) must initialize frame pointer and allocate 4 bytes at (ix-4)...(ix-1). 2. To call generic callee caller must load bank address to BC register pair and callee address to DE or IY, if _z88dk_fastcall support is required. 3. Callee is generic function. Compiler may assign bank number to extra global symbol (like: __sdcc_bank_<function_name>) while compiling (the symbol villbe loaded to BC before calls). 4. Callee is called as generic (near) function always within same code section/area. 5. Add optimization to compiler to replace calls to ABS address (n*8, n= 0...7) by corresponding RST instruction (someone may want put banked_call on one of RSTs). Example: _caller:: push ix ld ix,0 add ix,sp ld hl,4 add hl,sp ld sp,hl ... ld bc,__sdcc_bank_callee ld de,_callee call banked_call ... __sdcc_bank_callee equ 5 _callee:: ... banked_call:: in a,(BANK_PORT) ld -3(ix),a ex de,hl ex (sp),hl ld -2(ix),l ld -1(ix),h ld hl,100$ ex (sp),hl ex de,hl push de ret 100$: ld a,-3(ix) out (BANK_PORT),a ld c,-2(ix) ld b,-1(ix) push bc ret Best regards, Sergey Belyashov
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