6502/acme
1
0
Fork 0
mirror of https://github.com/uffejakobsen/acme.git synced 2024-06-22 11:29:26 +00:00
Code Issues Projects Releases Wiki Activity

ACME_Lib: added some more comments

Browse Source 
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@99 4df02467-bbd4-4a76-a152-e7ce94205b78
This commit is contained in:
marcobaye 2018-06-30 20:59:42 +00:00
parent bc68e36127
commit b3d818da39
3 changed files with 67 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
ACME_Lib/cbm/c128/kernal.a
View File

@ -9,7 +9,7 @@ lib_cbm_c128_kernal_a = 1
!address {
k_spin_spout = $ff47
k_close_all = $ff4a
k_c64mode = $ff4d
k_c64mode = $ff4d ; enter c64 mode (so does not return)
k_dma_call = $ff50
k_boot_call = $ff53
k_phoenix = $ff56
@ -18,17 +18,19 @@ lib_cbm_c128_kernal_a = 1
k_swapper = $ff5f
k_dlchr = $ff62
k_pfkey = $ff65
k_setbnk = $ff68
k_setbnk = $ff68 ; set banks for file name and load/save calls
k_getcfg = $ff6b
k_jsrfar = $ff6e
k_jmpfar = $ff71
k_indfet = $ff74
k_indsta = $ff77
k_indcmp = $ff7a
k_primm = $ff7d
k_primm = $ff7d ; "print immediate" - output string without having to setup a pointer:
; string must follow JSR $ff7d in memory, code execution will resume after terminating zero.
; A/X/Y are preserved
k_release_number = $ff80
}
!source <cbm/kernal.a> ; $ff81-$fff5 is backward compatible to older machines
!source <cbm/kernal.a> ; $ff81-$fff5 is mostly compatible to older machines
; $fff6/$fff7 are unused (ff ff)
!address {
k_indirect128mode = $fff8 ; indirect vector, without JMP command!

7
ACME_Lib/cbm/c64/cia2.a
View File

@ -5,6 +5,13 @@ lib_cbm_c64_cia2_a = 1
!address {
cia2_pra = $dd00
; %7....... DATA in (0 means GND)
; %.6...... CLK in (0 means GND)
; %..5..... DATA out (inverted, 1 means GND)
; %...4.... CLK out (inverted, 1 means GND)
; %....3... ATN out (inverted, 1 means GND)
; %.....2.. PA2 (pin M at user port, 0 means GND)
; %......10 VIC bank (inverted, so value $3 means address $0000)
cia2_prb = $dd01
cia2_ddra = $dd02
cia2_ddrb = $dd03

72
ACME_Lib/cbm/kernal.a
View File

@ -8,8 +8,10 @@ lib_cbm_kernal_a = 1
; There are alternative names for some calls.
!address {
; for additional c128 calls, see <cbm/c128/kernal.a>
k_cint = $ff81
k_ioinit = $ff84
; cbm-ii rom starts here:
k_ramtas = $ff87
k_restor = $ff8a
k_vector = $ff8d
@ -27,24 +29,58 @@ lib_cbm_kernal_a = 1
k_listen = $ffb1:k_listn = $ffb1
k_talk = $ffb4
k_readss = $ffb7
k_setlfs = $ffba
k_setnam = $ffbd ; A is length, X is ptr-low, Y is ptr-high
k_open = $ffc0
k_close = $ffc3:k_close_A = $ffc3
k_chkin = $ffc6:k_chkin_X = $ffc6
k_chkout = $ffc9:k_chkout_X = $ffc9:k_ckout = $ffc9
k_clrchn = $ffcc:k_clrch = $ffcc
k_chrin = $ffcf:k_basin = $ffcf
k_chrout = $ffd2:k_basout = $ffd2:k_bsout = $ffd2
k_load = $ffd5:k_load_AXY = $ffd5 ; A means verify, YYXX is desired load address (if channel == 0), returns end+1 in YYXX
k_save = $ffd8:k_save_AXY = $ffd8 ; A is zp address of start ptr(!), YYXX is end address (+1)
k_settim = $ffdb
k_rdtim = $ffde
k_stop = $ffe1
k_getin = $ffe4:k_get = $ffe4
k_setlfs = $ffba ; set file parameters (A = logical file number, X = device, Y = secondary address)
k_setnam = $ffbd ; set file name (A = length, YYXX = pointer)
; pet rom starts here:
; i/o calls: most of these set C on error. in that case, A holds error code.
k_open = $ffc0 ; open channel/file (call setlfs/setnam before!)
k_close = $ffc3:k_close_A = $ffc3 ; close channel/file (A = logical file number)
k_chkin = $ffc6:k_chkin_X = $ffc6 ; set input channel (X = logical file number)
k_chkout = $ffc9:k_chkout_X = $ffc9:k_ckout = $ffc9 ; set output channel (X = logical file number)
k_clrchn = $ffcc:k_clrch = $ffcc ; restore default input/output channels
k_chrin = $ffcf:k_basin = $ffcf ; read byte from current input channel (not the same as $ffe4, see note* below)
; A is result byte
; X is preserved
; Y gets clobbered by tape access (preserved by disk access)
k_chrout = $ffd2:k_basout = $ffd2:k_bsout = $ffd2 ; send byte to current output channel
; A/X/Y are preserved
k_load = $ffd5:k_load_AXY = $ffd5 ; load file to memory, or verify (call setlfs/setnam before!)
; A: zero means LOAD, nonzero means VERIFY
; YYXX is desired load address (only used if secondary address == 0), returns end address plus 1
k_save = $ffd8:k_save_AXY = $ffd8 ; save memory to file (call setlfs/setnam before!)
; A is zp address of start ptr(!)
; YYXX is end address plus 1
k_settim = $ffdb ; set time
k_rdtim = $ffde ; read time
k_stop = $ffe1 ; check STOP key
k_getin = $ffe4:k_get = $ffe4 ; get input byte (not the same as $ffcf, see note* below)
; A is result byte
; X is preserved
; Y gets clobbered by tape access (preserved by disk access)
k_clall = $ffe7
k_udtim = $ffea
k_scrorg = $ffed
k_plot = $fff0:k_plot_CXY = $fff0 ; get/set cursor (to set, clear carry. X/Y are y/x!)
k_iobase = $fff3
; pet rom stops here!?
k_scrorg = $ffed ; returns screen size (X = number of columns, Y = number of lines)
; CAUTION: the c128 uses a new format:
; c128: X/Y now return maximum values in current window (so 0..39/0..24 instead of 40/25).
; c128: A returns max column on current screen (39 or 79)
k_plot = $fff0:k_plot_CXY = $fff0 ; get/set cursor (X is line, Y is column)
; C = 0: set cursor position.
; C = 1: read cursor position.
k_iobase = $fff3 ; returns first i/o address (i.e. memory limit) in YYXX
; cbm-ii: $dc00
; vic20: $9110
; c64: $d000
; 264: $fd00
; c128: $d000
}
;note*
; the difference between CHRIN and GETIN depends on the current input device:
; input device 0 (keyboard): CHRIN reads from input buffer, GETIN reads from keyboard buffer
; (the same difference as between INPUT and GET in basic)
; input device 2 (rs232): CHRIN does some error handling, GETIN may just return zero on error.
; roughly speaking, CHRIN returns a "processed" byte while GETIN returns a "raw" byte.
; for devices on the IEC bus there should be no difference between the two calls.
; when reading from the console (keyboard/screen), a zero byte means "no data".
; do not expect a valid Z flag in this case! some devices may clobber the Z flag.