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textelite market start
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Irmen de Jong
parent
72b6dc3de7
commit
67a2241e32
@ -28,6 +28,16 @@ main {
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txt.print_ub(strlen(strptr))
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txt.chrout('\n')
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ubyte q
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for q in 0 to 255 {
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txt.print_ub(q)
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txt.chrout(' ')
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;txt.print_uw(q*4) ; TODO fix
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; txt.chrout(' ')
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txt.print_uw(q*$0004) ; TODO fix
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txt.chrout('\n')
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}
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}
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@ -20,6 +20,7 @@ main {
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galaxy.init(1)
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galaxy.travel_to(numforLave)
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market.init(0) ; Lave's market is seeded with 0
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planet.display(false)
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repeat {
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@ -80,7 +81,7 @@ trader {
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sub do_cash() {
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txt.print("\nCheat! Set cash amount: ")
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void txt.input_chars(input)
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ship.cash = lsb(conv.str2uword(input))
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ship.cash = conv.str2uword(input)
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}
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sub do_hold() {
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@ -121,7 +122,7 @@ ship {
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const uword Max_fuel = 70
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ubyte fuel = Max_fuel
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uword cash = 1000
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uword cash = 1000 ; actually has to be 4 bytes for the ultra rich.
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ubyte[17] cargohold = 0
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sub holdspace() -> ubyte {
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@ -132,7 +133,7 @@ ship {
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market {
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ubyte[17] baseprices = [$13, $14, $41, $28, $53, $C4, $EB, $9A, $75, $4E, $7C, $B0, $20, $61, $AB, $2D, $35]
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byte[17] gradients = [-$02, -$01, -$03, -$05, -$05, +$08, +$1D, +$0E, +$06, +$01, +$0d, -$09, -$01, -$01, -$02, -$01, +$0F]
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byte[17] gradients = [-$02, -$01, -$03, -$05, -$05, $08, $1D, $0E, $06, $01, $0d, -$09, -$01, -$01, -$02, -$01, $0F]
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ubyte[17] basequants = [$06, $0A, $02, $E2, $FB, $36, $08, $38, $28, $11, $1D, $DC, $35, $42, $37, $FA, $C0]
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ubyte[17] maskbytes = [$01, $03, $07, $1F, $0F, $03, $78, $03, $07, $1F, $07, $3F, $03, $07, $1F, $0F, $07]
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ubyte[17] units = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 0]
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@ -141,7 +142,37 @@ market {
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str[3] unitnames = ["t", "kg", "g"]
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ubyte[17] current_quantity = 0
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ubyte[17] current_price = 0
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uword[17] current_price = 0
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sub init(ubyte fluct) {
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; Prices and availabilities are influenced by the planet's economy type
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; (0-7) and a random "fluctuation" byte that was kept within the saved
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; commander position to keep the market prices constant over gamesaves.
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; Availabilities must be saved with the game since the player alters them
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; by buying (and selling(?))
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;
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; Almost all operations are one byte only and overflow "errors" are
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; extremely frequent and exploited.
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;
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; Trade Item prices are held internally in a single byte=true value/4.
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; The decimal point in prices is introduced only when printing them.
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; Internally, all prices are integers.
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; The player's cash is held in four bytes.
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ubyte ci
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for ci in 0 to len(names)-1 {
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word product
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byte changing
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product = planet.economy as word * gradients[ci]
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changing = fluct & maskbytes[ci] as byte
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ubyte q = (basequants[ci] as word + changing - product) as ubyte
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if q & $80
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q = 0 ; clip to positive 8-bit
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current_quantity[ci] = q & $3f
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q = (baseprices[ci] + changing + product) as ubyte
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current_price[ci] = q * $0004
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}
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current_quantity[16] = 0 ; force nonavailability of Alien Items
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}
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sub display() {
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ubyte ci
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@ -195,6 +226,7 @@ galaxy {
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generate_next_planet()
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}
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planet.name = make_current_planet_name()
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market.init(lsb(seed[0])+msb(seed[2]))
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}
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sub local_area() {
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@ -445,8 +477,8 @@ planet {
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ubyte ii
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str name = " " ; 8 chars max
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ubyte nx = 0
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for ii in 0 to gen_rnd_number() & 3 {
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ubyte x = gen_rnd_number() & $3e
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for ii in 0 to goatsoup_rnd_number() & 3 {
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ubyte x = goatsoup_rnd_number() & $3e
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if pairs0[x] != '.' {
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name[nx] = pairs0[x]
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nx++
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@ -461,7 +493,7 @@ planet {
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return name
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}
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sub gen_rnd_number() -> ubyte {
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sub goatsoup_rnd_number() -> ubyte {
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ubyte x = goatsoup_rnd[0] * 2
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uword a = x as uword + goatsoup_rnd[2]
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if goatsoup_rnd[0] > 127
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@ -519,7 +551,7 @@ planet {
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}
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else {
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if c <= $a4 {
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ubyte rnr = gen_rnd_number()
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ubyte rnr = goatsoup_rnd_number()
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ubyte wordNr = (rnr >= $33) + (rnr >= $66) + (rnr >= $99) + (rnr >= $CC)
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source_stack[stack_ptr] = source_ptr
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stack_ptr++
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@ -675,21 +707,28 @@ util {
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}
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txt.print(string)
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}
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asmsub print_10s(ubyte value @A) clobbers(A, X, Y) {
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asmsub print_10s(uword value @AY) clobbers(A, X, Y) {
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%asm {{
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jsr conv.ubyte2decimal ;(100s in Y, 10s in A, 1s in X)
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pha
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cpy #'0'
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jsr conv.uword2decimal
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lda conv.uword2decimal.decTenThousands
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cmp #'0'
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beq +
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tya
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jsr c64.CHROUT
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+ pla
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+ lda conv.uword2decimal.decThousands
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cmp #'0'
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beq +
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jsr c64.CHROUT
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+ lda conv.uword2decimal.decHundreds
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cmp #'0'
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beq +
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jsr c64.CHROUT
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+ lda conv.uword2decimal.decTens
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jsr c64.CHROUT
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lda #'.'
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jsr c64.CHROUT
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txa
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lda conv.uword2decimal.decOnes
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jsr c64.CHROUT
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rts
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rts
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}}
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}
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