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clearer description of memory()
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@ -334,7 +334,7 @@ _done
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return
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}
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; TODO rewrite the rest in optimized assembly
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; TODO rewrite the rest in optimized assembly (or reuse GRAPH_draw_line if we can get the FB replacement vector layer working)
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word @zp d = 0
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ubyte positive_ix = true
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if dx < 0 {
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@ -840,12 +840,15 @@ swap(x, y)
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Swap the values of numerical variables (or memory locations) x and y in a fast way.
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memory(name, size)
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Statically allocates a fixed portion of memory of the given size in bytes, and returns its address.
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Slabs are considered identical if their name and size are the same.
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This can be used to allocate parts of the memory where a normal byte array would
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not suffice for instance if you need more than 256 bytes, and/or don't want to work
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with fixed memory addresses for buffers.
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The portion of memory cannot be used as an array, you only have the address of the first byte.
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Returns the address of the first location of a statically "reserved" block of memory of the given size in bytes,
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with the given name. Requesting the address of such a named memory block again later with
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the same name, will result in the same address as before.
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When reusing blocks in that way, it is required that the size argument is the same,
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otherwise you'll get a compilation error.
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This routine can be used to "reserve" parts of the memory where a normal byte array variable would
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not suffice; for instance if you need more than 256 consecutive bytes.
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The return value is just a simple uword address so it cannot be used as an array in your program.
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You can only treat it as a pointer or use it in inline assembly.
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Library routines
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@ -2,7 +2,6 @@
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TODO
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====
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- (github issue:) replace memory() function by some sort of declaration?
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- use (zp) addressing mode on 65c02 specific code rather than ldy#0 / lda (zp),y
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- optimize pointer access code @(pointer)? use a subroutine? macro? 65c02 vs 6502?
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- can we get rid of the --longOptionName command line options and only keep the short versions? https://github.com/Kotlin/kotlinx-cli/issues/50
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@ -1,41 +1,20 @@
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%import test_stack
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%import textio
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%import diskio
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%import string
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%zeropage basicsafe
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%option no_sysinit
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main {
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sub start() {
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ubyte[40] input_line
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if diskio.f_open(8, "romdis.asm") {
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uword line=0
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repeat 5 {
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ubyte length = diskio.f_readline(input_line)
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if length {
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line++
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txt.print_uw(line)
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txt.chrout(':')
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txt.print_ub(length)
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txt.print(":[")
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ubyte xx
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for xx in 0 to length-1 {
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txt.print_ubhex(input_line[xx], 1)
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txt.chrout(' ')
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}
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; txt.print(&input_line)
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txt.print("]\n")
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; textparse.process_line()
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if c64.READST() ; TODO also check STOP key
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break
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} else
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break
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}
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diskio.f_close()
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}
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txt.print_uwhex(memory("a", 100), 1)
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txt.nl()
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txt.print_uwhex(memory("a", 200), 1)
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txt.nl()
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txt.print_uwhex(memory("a", 200), 1)
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txt.nl()
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txt.print_uwhex(memory("b", 200), 1)
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txt.nl()
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}
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}
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